Clean Room Screws | McMaster-Carr

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Clean Room Standard

Fed. Std. Class 100

ISO Class 5

Environment

Clean Room

System of Measurement

Thread Size

Length

Material

Fastener Head Type

Socket Head Profile

Finish

Threading

Drive Style

Head Diameter

Thread Pitch

Head Height

Drive Size

Thread Type

Specifications Met

Thread Spacing

Thread Direction

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RoHS

Tensile Strength

30,000 psi to 99,999 psi

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

REACH

58 Products

Cleaned and Bagged Socket Head Screws for High Vacuum

Install these screws in high-vacuum systems where even a small amount of contamination could affect performance. These are cleaned and double-bagged in an ISO Class 5 (Fed. Std. Class 100) clean room. The deep, six-point socket keeps hex keys from slipping out and damaging the drive.

Length is measured from under the head.

Silver-Plated 18-8 Stainless Steel—18-8 stainless steel screws release gas at a slower rate than other metal screws, so your system can reach higher levels of vacuum. The silver plating helps the screw slide smoothly when tightening or loosening it in the mounting surface.

		Head
	Lg.	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Clean Room Std.	Specs. Met		Each
Silver-Plated 18-8 Stainless Steel







				4-40

				1/2"	0.183"	0.112"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A110	000000


				3/4"	0.183"	0.112"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A160	00000
				1"	0.183"	0.112"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A210	00000




						6-32

						1/2"	0.226"	0.138"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A120	00000


						3/4"	0.226"	0.138"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A170	00000
						1"	0.226"	0.138"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A220	00000




								8-32

								1/2"	0.27"	0.164"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A130	00000


								3/4"	0.27"	0.164"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A180	00000
								1"	0.27"	0.164"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A230	00000




										10-32

										1/2"	5/16"	0.19"	Fully Threaded	Fine	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A140	00000


										3/4"	5/16"	0.19"	Fully Threaded	Fine	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A190	00000
										1"	5/16"	0.19"	Fully Threaded	Fine	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A240	00000




												1/4"-20

												1/2"	3/8"	1/4"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A150	00000


												3/4"	3/8"	1/4"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A200	00000
												1"	3/8"	1/4"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	—	90843A250	00000




														M3 × 0.5 mm

8 mm														5.5 mm	3 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A260	00000


10 mm	5.5 mm													3 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A300	00000
12 mm	5.5 mm													3 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A340	00000




		M4 × 0.7 mm

		8 mm	7 mm											4 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A270	00000


		10 mm	7 mm											4 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A310	00000
		12 mm	7 mm											4 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A350	00000




				M5 × 0.8 mm

				8 mm	8.5 mm									5 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A280	00000


				10 mm	8.5 mm									5 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A320	00000
				12 mm	8.5 mm									5 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A360	00000




						M6 × 1 mm

						8 mm	10 mm							6 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A290	00000


						10 mm	10 mm							6 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A330	00000
						12 mm	10 mm							6 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90843A370	00000

Cleaned and Bagged Venting Socket Head Screws for High Vacuum

Reduce the time it takes to reach vacuum conditions in high-vacuum systems. A vent in these screws allows fluid and gas to escape. Cleaned and double-bagged in an ISO Class 5 (Fed. Std. Class 100) clean room, use them these screws in places where even a small amount of contamination could affect performance. The deep, six-point socket keeps hex keys from slipping out and damaging the drive.

Length is measured from under the head.

18-8 Stainless Steel—Release gas at a slower rate than other metals, allowing your system to achieve higher levels of vacuum.

		Head
	Lg.	Dia.	Ht.	Vent Dia.	Threading	Thread Spacing	Tensile Strength, psi	Clean Room Std.	Specs. Met		Each
18-8 Stainless Steel







				4-40

				1/2"	0.183"	0.112"	0.036"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A110	000000


				3/4"	0.183"	0.112"	0.036"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A160	00000
				1"	0.183"	0.112"	0.036"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A210	00000




						6-32

						1/2"	0.226"	0.138"	0.04"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A120	00000


						3/4"	0.226"	0.138"	0.04"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A170	00000
						1"	0.226"	0.138"	0.04"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A220	00000




								8-32

								1/2"	0.27"	0.164"	0.042"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A130	00000


								3/4"	0.27"	0.164"	0.042"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A180	00000
								1"	0.27"	0.164"	0.042"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A230	00000




										10-32

										1/2"	5/16"	0.19"	0.052"	Fully Threaded	Fine	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A140	00000


										3/4"	5/16"	0.19"	0.052"	Fully Threaded	Fine	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A190	00000
										1"	5/16"	0.19"	0.052"	Fully Threaded	Fine	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A240	00000




												1/4"-20

												1/2"	3/8"	1/4"	0.063"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A150	00000


												3/4"	3/8"	1/4"	0.063"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A200	00000
												1"	3/8"	1/4"	0.063"	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	ASME B18.3	90841A250	00000




														M3 × 0.5 mm

8 mm														5.5 mm	3 mm	1 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A260	00000


10 mm	5.5 mm													3 mm	1 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A300	00000
12 mm	5.5 mm													3 mm	1 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A340	00000




		M4 × 0.7 mm

		8 mm	7 mm											4 mm	1.1 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A270	00000


		10 mm	7 mm											4 mm	1.1 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A310	00000
		12 mm	7 mm											4 mm	1.1 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A350	00000




				M5 × 0.8 mm

				8 mm	8.5 mm									5 mm	1.3 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A280	00000


				10 mm	8.5 mm									5 mm	1.3 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A320	00000
				12 mm	8.5 mm									5 mm	1.3 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A360	00000




						M6 × 1 mm

						8 mm	10 mm							6 mm	1.6 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A290	00000


						10 mm	10 mm							6 mm	1.6 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A330	00000
						12 mm	10 mm							6 mm	1.6 mm	Fully Threaded	Coarse	70,000	Fed. Std. Class 100, ISO Class 5	DIN 912, ISO 4762	90841A370	00000

Clean Room Factory-Set Torque Screwdrivers

Rated for ISO Class 5 (Fed. Std. Class 100) clean rooms, these tools have a sealed handle to keep lubrication in and contaminants out. They are factory set to reach the same torque every time. Drivers slip to disengage and stop turning the fastener when the set torque is reached, preventing overtightening. The torque setting cannot be adjusted. Drivers come with a calibration certificate that is traceable to NIST and states the product has passed a test for accuracy. Use with screwdriver bits (not included).

								Material
	Torque Setting	Torque Setting Increment	For Bit Hex Shank Size	Clockwise Accuracy	Torque-Limiting Direction	Certificate Type	Overall Lg.	Shaft	Handle	Clean Room Std.		Each
Slip-Release Torque Limiter







				in·lbf

				0.9 in·lbf to 12 in·lbf	0.1 in·lbf	1/4"	±6%	Clockwise	Calibration Certificate Traceable to NIST	4 3/8"	Steel	Aluminum	Fed. Std. Class 100, ISO Class 5	2999N11	0000000


				4.4 in·lbf to 36 in·lbf	0.1 in·lbf	1/4"	±6%	Clockwise	Calibration Certificate Traceable to NIST	5"	Steel	Aluminum	Fed. Std. Class 100, ISO Class 5	2999N12	000000




						N-cm

						14 N-cm to 135 N-cm	0.1 N-cm	1/4"	±6%	Clockwise	Calibration Certificate Traceable to NIST	4 3/8"	Steel	Aluminum	Fed. Std. Class 100, ISO Class 5	2999N13	000000


						50 N-cm to 400 N-cm	0.1 N-cm	1/4"	±6%	Clockwise	Calibration Certificate Traceable to NIST	5"	Steel	Aluminum	Fed. Std. Class 100, ISO Class 5	2999N14	000000