SERIES NA1-PK5/5 Ultra-slim Body Picking Sensor Even a slim hand is detected by the 25 mm (0.984 in) pitch beam curtain Conforming to UL Recognition EMC Directive NA1-5 10 mm 0.394 in thick: half the thickness of conventional models Clearly visible job indicator Long sensing range: 3 m 9.843 ft Space savings now possible; ultra-thin Bright, easy-to-see job indicators, Its long sensing range of 3 m 9.843 ft design does not obstruct picking 55 mm 2.165 in length, have been is sufficient for confirming access to a operations. incorporated into both the emitter and parts shelf. Further, if the sensor has the receiver. This sensor is optimal for been set to the Light-ON mode, the picking. With the NA1-PK5, we’ve output is turned OFF should the cable enhanced visibility even further by break. using 8 orange LED lights. 55 mm 2.165 in Cable can be freely arranged in any position Two unit installations are possible Lighting pattern selectable Selectable detection operation Sensor units can now be set to The job indicator operation can be Either of two different detection operations different light emission frequencies, in selected as either continuous lighting may be selected, in order to best suit the order to prevent mutual interference. or blinking. particular application. Sensor units can be Two units can now be operated in a set to detect the interruption of 1 or more side-by-side configuration without beam channels, or can be set to detect only Continuous Blinking interference, for problem-free detection the interruption of 2 or more beam channels. lighting over wider areas. Single beam interruption Double beam interruption Changeover Changeover All opaque bodies with The accidental passage of "35 mm "1.378 in or small objects through the beam greater will be detected. axis will not trigger detection, yet the operator’s hands will always be accurately detected. This function is also useful when small objects regularly interrupt the beam axis. 462 NA1-PK5/5 APPLICATIONS Preventing wrong parts picking Access control on assembly line Detecting parts having wide positioning area Never use this product in any WARNING personnel safety application. ORDER GUIDE Type Appearance Sensing range (Note) Model No. Output 0.1 to 1.2 m NPN open-collector transistor NA1-PK5 0.328 to 3.937 ft 0.05 to 0.5 m 0.164 to 1.640 ft Sensing height NA1-PK5-PN PNP open-collector transistor when set to SHORT. 100 mm 3.937 in 0.2 to 3 m NPN open-collector transistor NA1-5 Beam pitch 0.656 to 9.843 ft 5 beam channels 0.05 to 1 m 0.164 to 3.281 ft 25 mm 0.984 in NA1-5-PN PNP open-collector transistor when set to SHORT. Note:The sensing range is the possible setting distance between the emitter and the receiver. NA1-PK5(-PN) can detect an object less than 0.1 m 0.328 ft (0.05 m 0.164 ft when set to SHORT) away. NA1-5(-PN) can detect an object less than 0.2 m 0.656 ft (0.05 m 0.164 ft when set to SHORT) away. Actual sensing range of the sensor NA1-PK5(-PN): 1.2 m 3.937 ft Receiver cannot be NA1-PK5(-PN): 0.1 m 0.328 ft (0.05 m 0.164 ft when set to SHORT) (0.5 m 1.640 ft when set to SHORT) placed in this range NA1-5(-PN): 0.2 m 0.656 ft (0.05 m 0.164 ft when set to SHORT) NA1-5(-PN): 3 m 9.843 ft Setting range of the receiver (1 m 3.281 ft when set to SHORT) Emitter Receiver Receiver 5 m 16.404 ft cable length type, pigtailed type 5 m 16.404 ft cable length type (standard: 2 m 6.562 ft) and pigtailed type (standard: cable type) are also available. • Table of Model Nos. Type Standard type 5 m 16.404 ft cable length type Pigtailed type (Note) NA1-PK5 NA1-PK5-J NA1-PK5-PN NA1-PK5-PN-J NA1-5 NA1-5-C5 NA1-5-J NA1-5-PN NA1-5-PN-J Note: Please order the suitable mating cable separately for pigtailed type. • Mating cable (2 cables are required.) Model No. Description "14 mm "0.551 in 4-core, cable length 2 m 6.562 ft CN-24-C2 4-core, cable length 5 m 16.404 ft CN-24-C5 300 mm Mating cable 11.811 in 463 1800 2000 Long High-luminous Long sensing High-luminous sensing job indicator range type job indicator type range type type NA1-PK5/5 OPTIONS Designation Model No. Description MS-NA1-1 Four bracket set Four M4 (length 15 mm 0.591 in) screws with washers, eight Sensor nuts, four hooks, four spacers and eight M4 (length 18 mm mounting bracket 0.709 in) screws with washers are attached. (Spacers are not attached with MS-NA1-1.) MS-NA2-1 It protects the sensor body. Two silver bracket set MS-NA3 Four M4 (length 15 mm 0.591 in) screws with washers, and four nuts are attached. Sensor protection bracket It protects the sensor body. Two black bracket set MS-NA3-BK Four M4 (length 15 mm 0.591 in) screws with washers, and four nuts are attached. The slit mask restrains the amount of beam emitted or received. Slit mask OS-NA1-5 (Seal type, 10 pcs. in 1 set) SL-WY This connector is able to combine the cables of receiver and Y-shaped connector emitter into one. 5 pcs. per set Sensor protection brackets Slit mask • MS-NA3 • OS-NA1-5 • MS-NA3-BK Since the slit mask is seal type, it can be used by sticking it to the detection surface. Take care that the sensing range will be reduced when the slit mask is used. Please contact our office for details. M4 screws with washers, and nuts are attached. Sensor mounting brackets • MS-NA1-1 • MS-NA2-1 M4 screws with washers, nuts M4 screws with washers, nuts, and hooks are attached. and hooks and spacers are attached. Y-shaped connector • SL-WY Y-shaped connector SL-WY "14 mm 0.551 in Mating cable CN-24-C2 / CN-24-C5 300 mm 11.811 in 464 NA1-PK5/5 SPECIFICATIONS NPN output PNP output Type High-luminous job indicator type Long sensing range type High-luminous job indicator type Long sensing range type Item Model No. NA1-PK5 NA1-5 NA1-PK5-PN NA1-5-PN Sensing height 100 mm 3.937 in 0.1 to 1.2 m 0.328 to 3.937 ft 0.2 to 3 m 0.656 to 9.843 ft 0.1 to 1.2 m 0.328 to 3.937 ft 0.2 to 3 m 0.656 to 9.843 ft Sensing range (Note 1) (0.05 to 0.5 m 0.164 to 1.640 ft when set to SHORT) (0.05 to 1 m 0.164 to 3.281 ft when set to SHORT) (0.05 to 0.5 m 0.164 to 1.640 ft when set to SHORT) (0.05 to 1 m 0.164 to 3.281 ft when set to SHORT) Beam pitch 25 mm 0.984 in Number of beam channels 5 beam channels Sensing object "35 mm "1.378 in or more opaque object Supply voltage 12 to 24 V DC�10 % Ripple P-P 10 % or less Power consumption (Note 2) Emitter: 0.5 W or less, Receiver: 0.8 W or less Emitter: 0.6 W or less, Receiver: 0.9 W or less NPN open-collector transistor PNP open-collector transistor • Maximum sink current: 100 mA • Maximum source current: 100 mA Output • Applied voltage: 30 V DC or less (between output and 0 V) • Applied voltage: 30 V DC or less (between output and�V) • Residual voltage: 1 V or less (at 100 mA sink current) • Residual voltage: 1 V or less (at 100 mA source current) 0.4 V or less (at 16 mA sink current) 0.4 V or less (at 16 mA source current) Utilization category DC-12 or DC-13 ON or OFF when one or more beam channels are interrupted / Output operation ON or OFF when two or more beam channels are interrupted, selectable by operation mode switch Short-circuit protection Incorporated Response time 10 ms or less (when the interference prevention is used, in Light state: 30 ms or less, in Dark state: 13 ms or less) Power indicator: Green LED (lights up when the power is ON) Power indicator: Green LED (lights up when the power is ON) Job indicator: Orange LED Job indicator: Orange LED Emitter lights up or blinks when the job indicator input is Low, lights up or blinks when the job indicator input is High, lighting pattern is selected by operation mode switch lighting pattern is selected by operation mode switch Operation indicator: Red LED Operation indicator: Red LED lights up when one or more beam channels are lights up when one or more beam channels are interrupted, but lights up when two beam channels or more interrupted, but lights up when two beam channels or more are interrupted in the double-beam-interruption mode are interrupted in the double-beam-interruption mode Receiver Stable incident beam indicator: Green LED Stable incident beam indicator: Green LED (lights up when all beam channels are stably received) (lights up when all beam channels are stably received) Job indicator: Orange LED Job indicator: Orange LED lights up or blinks when the job indicator input is Low, lights up or blinks when the job indicator input is High, lighting pattern is selected by operation mode switch lighting pattern is selected by operation mode switch Interference prevention function Incorporated Pollution degree 3 (Industrial environment) Protection IP62 (IEC) Ambient temperature �10 to�55 �C �14 to�131 �F (No dew condensation or icing allowed), Storage: �20 to�70 �C �4 to�158 �F Ambient humidity 35 to 85 % RH, Storage: 35 to 85 % RH Ambient illuminance Sunlight: 10,000 ?x at the light-receiving face, Incandescent light: 3,000 ?x at the light-receiving face EMC EN 50081-2, EN 50082-2, EN 60947-5-2 Voltage withstandability 1,000 V AC for one min. between all supply terminals connected together and enclosure Insulation resistance 20 MΩ, or more, with 250 V DC megger between all supply terminals connected together and enclosure Vibration resistance 10 to 150 Hz frequency, 0.75 mm 0.030 in amplitude in X, Y and Z directions for two hours each 2 Shock resistance 490 m/s acceleration (50 G approx.) in X, Y and Z directions for three times each Emitting element Infrared LED (synchronized scanning system) Material Enclosure: Heat-resistant ABS, Lens cover: Acrylic, Indicator cover: Acrylic 2 Cable 0.3 mm 4-core (emitter: 3-core) oil resistant cabtyre cable, 2 m 6.562 ft long 2 Cable extension Extension up to total 100 m 328.084 ft is possible for both emitter and receiver with 0.3 mm , or more, cable. Emitter: 80 g approx. Emitter: 70 g approx. Emitter: 70 g approx. Emitter: 80 g approx. Weight Receiver: 85 g approx. Receiver: 80 g approx. Receiver: 80 g approx. Receiver: 85 g approx. Notes: 1) The sensing range is the possible setting distance between Actual sensing range of the sensor NA1-PK5(-PN): 1.2 m 3.937 ft the emitter and the receiver. NA1-PK5(-PN) can detect an Receiver cannot be NA1-PK5(-PN): 0.1 m 0.328 ft (0.05 m 0.164 ft when set to SHORT) (0.5 m 1.640 ft when set to SHORT) object less than 0.1 m 0.328 ft (0.05 m 0.164 ft when set to placed in this range NA1-5(-PN): 0.2 m 0.656 ft (0.05 m 0.164 ft when set to SHORT) NA1-5(-PN): 3 m 9.843 ft SHORT) away, NA1-5(-PN) can detect an object less than (1 m 3.281 ft when set to SHORT) Setting range of 0.2 m 0.656 ft (0.05 m 0.164 ft when set to SHORT) away. the receiver Notes: 2) Obtain the current consumption by the following equation. Current consumption�Power consumption�Supply voltage (e.g.) When the supply voltage is 12 V, the current consumption of the emitter is: 0.5 W�12 V c 0.042 A�42 mA Receiver Emitter Receiver 465 Environmental resistance Indicators NA1-PK5/5 I/O CIRCUIT AND WIRING DIAGRAMS NA1-PK5 NPN output type NA1-5 I/O circuit diagram Wiring diagram Color code / Connector pin No. of the pigtailed type (Brown / 1)�V D (Black / 4) Load Color code / Connector pin No. � Output (Note 1) 12 to 24 V DC of the pigtailed type Tr �10 % 100 mA max. � ZD (Blue / 3) 0 V Brown / 1 (Pink / 2) Job Load m1 Job indicator indicator input � Black / 4 12 to 24 V DC lighting / blinking circuit �10 % � E m1 Blue / 3 Non-contact voltage or NPN open- m1 Internal circuit Users’ circuit collector transistor Pink / 2 Notes: 1) The emitter does not incorporate the output. or Notes: 2) Unused wire must be insulated to ensure that they Notes: 1) The emitter does not incorporate the black do not come into contact with wires already in use. lead wire. Low (0 to 2 V): Lights up or Blinks Notes: 2) Unused wire must be insulated to ensure that High (5 to 30 V, or open): Lights off Symbols … D : Reverse supply polarity protection diode they do not come into contact with wires ZD: Surge absorption zener diode already in use. Tr : NPN output transistor Connector pin position E : Job indicator (IND.) (Pigtailed type) 1 2 Job indicator �V input 4 3 Output (Note 1) 0 V Notes: 1) No connection is required for the emitter. Notes: 2) The pin arrangement of the SL-WY Y-shaped connector (optional) is identical to the receiver. NA1-PK5-PN PNP output type NA1-5-PN I/O circuit diagram Wiring diagram Color code / Connector pin No. of the pigtailed type (Brown / 1)�V ZD Tr 100 mA max. � Color code / Connector pin No. 12 to 24 V DC �10 % of the pigtailed type (Black / 4) � Load Output (Note 1) D Brown / 1 (Blue / 3) 0 V Job indicator m1 lighting / blinking circuit � Black / 4 12 to 24 V DC (Pink / 2) Job �10 % indicator input � E Load m1 Blue / 3 Internal circuit Users’ circuit Non-contact voltage or PNP open- m1 collector transistor Pink / 2 Notes: 1) The emitter does not incorporate the output. or Notes: 2) Unused wire must be insulated to ensure that they Notes: 1) The emitter does not incorporate the black do not come into contact with wires already in use. lead wire. High (4 V or more): Lights up or Blinks Notes: 2) Unused wire must be insulated to ensure that Low (0 to 0.6 V, or open): Lights off they do not come into contact with wires Symbols … D : Reverse supply polarity protection diode already in use. ZD: Surge absorption zener diode Tr : PNP output transistor Connector pin position E : Job indicator (IND.) (Pigtailed type) 2 1 Job indicator �V input 4 3 Output (Note 1) 0 V Notes: 1) No connection is required for the emitter. Notes: 2) The pin arrangement of the SL-WY Y-shaped connector (optional) is identical to the receiver. 466 Sensor circuit Sensor circuit NA1-PK5/5 SENSING CHARACTERISTICS (TYPICAL) NA1-PK5 NA1-PK5-PN Parallel deviation • Vertical direction • Horizontal direction Vertical direction 2 2 ? 6.562 6.562 Receiver Setting on Setting on 1.5 LONG 1.5 LONG L 4.921 4.921 Emitter 1 1 Setting on 3.281 3.281 SHORT Horizontal direction 0.5 0.5 1.640 1.640 Setting on ? Receiver SHORT 0 0 100 50 050 100 100 50 050 100 L 3.937 1.969 1.969 3.937 3.937 1.969 1.969 3.937 Down Center Up Left Center Right Emitter Operating point ? (mm in) Operating point ? (mm in) Angular deviation • Setting on LONG • Setting on SHORT Emitter angular deviation 2 2 6.562 6.562 Receiver Receiver Emitter angular angular $ L deviation deviation 1.5 1.5 Emitter Receiver 4.921 4.921 angular angular Emitter deviation deviation 1 1 3.281 3.281 Receiver angular deviation 0.5 0.5 1.640 1.640 Receiver 0 0 20 10 0 10 20 20 10 0 10 20 $ L Left Center Right Left Center Right $ $ Operating angle ( ° ) Operating angle ( ° ) Emitter NA1-5 NA1-5-PN Parallel deviation Angular deviation • Common for both horizontal and vertical directions • Setting on LONG • Setting on SHORT Vertical direction Emitter angular deviation 4 4 4 4 ? 13.123 13.123 13.123 Receiver Receiver 3 3 3 3 $ L L Receiver Receiver 9.843 9.843 9.843 Setting on angular angular LONG deviation deviation Emitter 2 2 2 2 6.562 6.562 6.562 Emitter Setting on SHORT Horizontal direction 1 Receiver angular deviation 1 1 3.281 3.281 3.281 Emitter Emitter ? Receiver Receiver angular angular deviation deviation 0 0 0 200 100 0 100 200 20 10 0 10 20 20 10 0 10 20 L 7.874 3.937 3.937 7.874 Left Center Right Left Center Right $ L (Down) Left Center Right (Up) $ $ Operating angle ( ° ) Operating angle ( ° ) Operating point ? (mm in) Emitter Emitter 467 Setting distance L (m ft) Setting distance L (m ft) Setting distance L (m ft) Setting distance L (m ft) Setting distance L (m ft) Setting distance L (m ft) Setting distance L (m ft) NA1-PK5/5 PRECAUTIONS FOR PROPER USE LONG / SHORT selection switch (incorporated on the emitter) • Never use this product as a sensing device for • Select the switch setting according to the setting distance personnel protection. between the emitter and the receiver as given below. • For sensing devices to be used as safety The switches must be set with the power supply off. devices for press machines or for personnel The operation mode does not change if the switch protection, use products which meet standards, () setting is changed with the power supplied. such as OSHA, ANSI or IEC etc., for personnel protection applicable in each region or country. Setting distance Operation mode switch • If this product is used as a sensing device for personnel protection, death or serious body 0.05 to 0.5 m 0.164 to 1.640 ft [NA1-PK5(-PN)] LONG SHORT injury could result. 0.05 to 1 m 0.164 to 3.281 ft [NA1-5(-PN)] • For a product which meets safety standards, use the following products. 0.5 to 1.2 m 1.640 to 3.937 ft [NA1-PK5(-PN)] LONG SHORT 1 to 3 m 3.281 to 9.843 ft [NA1-5(-PN)] Type 4: SF4-AH series SF2-EH series Type 2: SF2-A series SF2-N series Selection of output operation Mounting • The output operation mode is selected by the operation • Use M4 screws with washers and M4 nuts. The tightening mode switch on the receiver. torque should be 0.5 N�m or less. The switches must be set with the power supply off. (Please arrange the screws and nuts separately.) The operation mode does not change if the switch () setting is changed with the power supplied. Output operation Operation mode switch M4 screws with ON when one or more beam washers channels are interrupted SINGLE DOUBLE (OFF when all beam channels D / ON L / ON are received). M4 nuts OFF when one or more beam channels are interrupted (ON SINGLE DOUBLE when all beam channels are D / ON L / ON received). ON when any two or more beam channels are SINGLE DOUBLE Orientation D / ON L / ON interrupted. • The emitter and the receiver must face each other correctly. If they are set upside down, the sensor does not work. OFF when any two or more beam channels are SINGLE DOUBLE D / ON L / ON interrupted. Cable Job indicator operation selection • Lighting / Blinking is selected by the operation mode Cable switch on the emitter and the receiver. The switches must be set with the power supply off. The operation mode does not change if the switch () Interference prevention function setting is changed with the power supplied. • By setting different emission frequencies, two units of the sensor can be mounted close together, as shown in the Operation mode switch figure below. Emitter Receiver The switches must be set with the power supply off. The operation mode does not change if the switch LIGHT FLASH LIGHT FLASH () Lighting setting is changed with the power supplied. LIGHT FLASH LIGHT FLASH Sensor A Sensor A Blinking Others • Do not use during the initial transient time (0.5 sec.) after the power supply is switched on. Sensor B Sensor B Operation mode switch Emitter Receiver FREQ. A FREQ. B FREQ. A FREQ. B Sensor A (FREQ. A) FREQ. A FREQ. B FREQ. A FREQ. B Sensor B (FREQ. B) 468 NA1-PK5/5 DIMENSIONS (Unit: mm in) NA1-PK5(-PN) Sensor NA1-5(-PN) Emitter Receiver 2-"4.6 "0.181 2-"4.5 "0.177 2-"4.5 "0.177 2-"4.6 "0.181 supplementary mounting mounting holes with mounting holes with supplementary mounting holes, 1.1 0.043 deep M4 nut seats, 3.3 0.130 deep M4 nut seats, 3.3 0.130 deep holes, 1.1 0.043 deep (on both sides) (1.1 0.043 deep on back side) (1.1 0.043 deep on back side) (on both sides) 30 1.181 30 1.181 18 18 10 0.709 10 0.709 0.394 0.394 5 0.197 5 0.197 15 15 0.591 0.591 Beam Beam Operation Channel 1 Channel 1 Operation mode switch 25 25 Job indicator (Orange) mode switch Job indicator (Orange) 0.984 0.984 Beam Beam Channel 2 Channel 2 25 25 0.984 0.984 Beam Beam 130 140 Channel 3 140 130 Channel 3 5.118 5.512 Stable incident 5.512 5.118 25 25 beam indicator (Green) 0.984 0.984 Beam Beam Channel 4 Channel 4 25 25 0.984 0.984 Beam Beam Channel 5 Channel 5 Power Operation indicator (Green) indicator (Red) 5 0.197 5 0.197 "3.7 "0.146 cable, "3.7 "0.146 cable, 2 m 6.562 ft long 2 m 6.562 ft long MS-NA1-1 Sensor mounting bracket (Optional) Assembly dimensions Mounting drawing with the receiver 2-M4 screws with washers 20 0.787 2-hooks 10 0.394 6 0.236 18 32 40 1.575 0.709 2-M4 nuts 40 1.260 4-"4.6 30 1.181 1.575 5 20 18 "0.181 t 2 6 0.236 0.197 0.787 0.709 10 t 0.079 4.6 0.181 holes 25 0.984 0.394 15 0.591 10 0.394 Beam Channel 1 25 0.984 Beam 22 Channel 2 0.866 6 25 6 0.236 0.984 0.236 Beam 130 (110) 4.6 0.181 Channel 3 140 5.118 20 10 (4.331) 25 5.512 0.787 0.394 0.984 4.6 0.181 Beam Channel 4 25 Material: Cold rolled carbon steel (SPCC) 0.984 (Uni-chrome plated) Beam Four bracket set Channel 5 Four M4 (length 15 mm 0.591 in) screws with 10 0.394 washers, eight nuts, four hooks and eight M4 (length 18 mm 0.709 in) screws with washers are attached. 4.6 M4 (length 18 mm 0.709 in) screws with 0.181 () washers are not used for NA1-PK5/5 series. 469 NA1-PK5/5 DIMENSIONS (Unit: mm in) MS-NA2-1 Sensor mounting bracket (Optional) Assembly dimensions Mounting drawing with the receiver t 1.6 t 0.063 75 2.953 2-hooks 45 1.772 (18.6) 2-M4 nuts 18 (0.732) 0.709 20 30 10 0.787 1.181 0.394 75 2.953 15 45 30 0.591 20 Beam 1.772 1.181 Channel 1 0.787 25 30 6 6 0.984 1.181 0.236 Beam 0.236 Channel 2 4.6 6 6 25 0.181 0.984 0.236 0.236 Beam (80) Channel 3 (3.150) 25 0.984 37 4.6 Beam 30 1.457 0.181 5 Channel 4 1.181 20 0.197 25 0.984 0.787 Beam Channel 5 30 1.181 2-"4.6 "0.181 holes 6 18 2-M4 screws 0.236 0.709 with washers Material: Cold rolled carbon steel (SPCC) (Uni-chrome plated) Four bracket set Four M4 (length 15 mm 0.591 in) screws with washers, eight nuts, four hooks, four spacers and eight M4 (length 18 mm 0.709 in) screws with washers are attached. MS-NA3 Sensor protection bracket (Optional) MS-NA3-BK 15 15 34.2 34.2 0.591 7 0.591 7 2-"4.8 "0.189 1.346 1.346 2-"4.8 "0.189 0.276 0.276 5 5 9 0.354 9 0.354 0.197 0.197 17 17 17 17 23 23 0.669 0.669 0.669 0.669 0.906 0.906 25 25 0.984 0.984 7.1 7.1 57 57 0.280 0.280 2.244 2.244 25 25 72.5 72.5 7.1 0.984 0.984 7.1 2.854 130 2.854 0.280 0.280 130 144 5.118 5.118 144 25 25 5.669 5.669 0.984 0.984 7.1 7.1 25 25 8.1 0.319 8.1 0.319 0.280 0.280 0.984 0.984 7 7 10.5 10.5 0.276 0.276 27 0.413 0.413 27 17 17 1.063 1.063 0.669 0.669 7 0.276 7 0.276 5-"14 5-"14 9 9 "0.551 "0.551 5 5 4.35 4.5 4.5 4.35 0.354 0.354 0.197 2-"9 "0.354 0.197 0.171 0.177 0.177 0.171 2-"9 "0.354 15 15 13.7 13.7 0.591 0.591 0.539 0.539 10.5 t 1.6 t 0.063 10.5 t 1.6 t 0.063 0.413 31 31 0.413 1.220 1.220 For receiver For emitter Material: Cold rolled carbon steel (SPCC) (MS-NA3: Chrome plated, MS-NA3-BK: Black chromate) Two bracket set Four M4 (length 15 mm 0.591 in) screws with washers, and four nuts are attached. 470