Socket-Drive Thumb Screws

Filter by

System of Measurement

Thread Size

Length

Head Diameter

Material

Shoulder Length

Shoulder Diameter

Thumb Screw Head Profile

Thread Length

Threading

Head Height

Drive Size

Thread Type

Thread Spacing

Tensile Strength

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

RoHS

Compliant

DFARS Specialty Metals

Hardness

Performance

Thread Fit

Unified Standard Class 2A

Unified Standard Class 3A

Thread Pitch

0.5 mm

0.7 mm

0.8 mm

Relative Thread Length

133 Products

Stainless Steel Thumb Head Hex-Drive Precision Shoulder Screws

Take a hands-on approach with screws designed to be adjusted without tools. Twist the knob by hand for easy adjustment in maintenance-heavy environments. The hex drive offers the option for added torque. They are engineered to tight tolerances for assemblies that require smooth and accurate movement, with shoulder diameters twice as precise as those on standard-fit screws.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

				Head					Each
	Shoulder Lg.	Thread Size	Thread Lg.	Dia.	Ht.	Drive Size	Tensile Strength, psi		1-4	5-Up
18-8 Stainless Steel







				1/8" Diameter Shoulder (-0.001" to 0" Tolerance)

				1/8"	4-40	5/32"	5/16"	1/8"	5/64"	70,000	000000000	00000	00000


				3/16"	4-40	5/32"	5/16"	1/8"	5/64"	70,000	000000000	0000	0000
				1/4"	4-40	5/32"	5/16"	1/8"	5/64"	70,000	000000000	0000	0000
				5/16"	4-40	5/32"	5/16"	1/8"	5/64"	70,000	000000000	0000	0000
				3/8"	4-40	5/32"	5/16"	1/8"	5/64"	70,000	000000000	0000	0000




						3/16" Diameter Shoulder (-0.001" to 0" Tolerance)

						1/8"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000


						3/16"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000
						1/4"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000
						5/16"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000
						3/8"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000
						1/2"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000
						5/8"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000
						3/4"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000
						1"	8-32	3/16"	3/8"	5/32"	3/32"	70,000	000000000	0000	0000




								1/4" Diameter Shoulder (-0.001" to 0" Tolerance)

								1/8"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000


								3/16"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000
								1/4"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000
								5/16"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000
								3/8"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000
								1/2"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000
								5/8"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000
								3/4"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000
								1"	10-32	1/4"	7/16"	3/16"	1/8"	70,000	000000000	0000	0000




										4 mm Diameter Shoulder (-0.025 mm to 0 mm Tolerance)

										4 mm	M3 × 0.5 mm	4 mm	8 mm	3.2 mm	2 mm	70,000	000000000	0000	0000


										5 mm	M3 × 0.5 mm	4 mm	8 mm	3.2 mm	2 mm	70,000	000000000	0000	0000
										6 mm	M3 × 0.5 mm	4 mm	8 mm	3.2 mm	2 mm	70,000	000000000	0000	0000
										8 mm	M3 × 0.5 mm	4 mm	8 mm	3.2 mm	2 mm	70,000	000000000	0000	0000
										10 mm	M3 × 0.5 mm	4 mm	8 mm	3.2 mm	2 mm	70,000	000000000	0000	0000




										5 mm Diameter Shoulder (-0.025 mm to 0 mm Tolerance)

		4 mm								M4 × 0.7 mm	5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000


		5 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		6 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		8 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		10 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		12 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		14 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		16 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		20 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000
		25 mm	M4 × 0.7 mm							5 mm	10 mm	4 mm	2.5 mm	70,000	000000000	0000	0000




				6 mm Diameter Shoulder (-0.025 mm to 0 mm Tolerance)

				6 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000


				8 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000
				10 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000
				12 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000
				14 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000
				16 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000
				20 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000
				25 mm	M5 × 0.8 mm					6 mm	12 mm	5 mm	3 mm	70,000	000000000	0000	0000

Shoulder Shims

Shoulder

Shortening

Shoulder Shortening—Pare down the shoulder on screws or tighten the screw's hold. Stack multiple shims to get the exact spacing you need.

		Shoulder Shortening
	Thk.	For Screw Size	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				For 1/8" Diameter Shoulder

				0.005"	No. 4	10	000000000	00000


				0.01"	No. 4	10	000000000	0000
				0.016"	No. 4	10	000000000	0000
				0.02"	No. 4	10	000000000	0000
				0.03"	No. 4	10	000000000	0000
				0.06"	No. 4	5	000000000	0000




						For 3/16" Diameter Shoulder

						0.005"	No. 8	10	000000000	0000


						0.01"	No. 8	10	000000000	0000
						0.016"	No. 8	10	000000000	0000
						0.02"	No. 8	10	000000000	0000
						0.03"	No. 8	10	000000000	0000
						0.06"	No. 8	5	000000000	0000




								For 1/4" Diameter Shoulder

								0.005"	No. 10	50	000000000	0000


								0.01"	No. 10	100	000000000	00000
								0.016"	No. 10	50	000000000	00000
								0.02"	No. 10	50	000000000	00000
								0.03"	No. 10	50	000000000	00000
								0.06"	No. 10	25	000000000	0000




										For 4 mm Diameter Shoulder

										0.005"	M4	10	000000000	00000


										0.01"	M4	10	000000000	00000
										0.031"	M4	10	000000000	00000




												For 5 mm Diameter Shoulder

												0.005"	M5	10	000000000	00000


0.01"	M5											10	000000000	00000
0.031"	M5											10	000000000	00000




		For 6 mm Diameter Shoulder

		0.005"	M6									10	000000000	00000


		0.01"	M6									10	000000000	00000
		0.015"	M6									10	000000000	00000
		0.02"	M6									10	000000000	00000
		0.025"	M6									10	000000000	00000
		0.031"	M6									10	000000000	00000
		0.062"	M6									5	000000000	0000

Hex-Drive Plastic-Head Thumb Screws

Twist these thumb screws with a hex key when you need more torque than fingers can provide. You can also use a hex key to unfasten them in cramped spaces such as small control boxes. When fastening these thumb screws by hand, the knurled texture of the head creates extra grip as you twist. These thumb screws combine the strength of stainless steel with a lightweight plastic head that won't rust.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Temp. Range, ° F	Color	Threading	Tensile Strength	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				4-40

				9/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	25	000000000	000000


				13/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	25	000000000	00000
				17/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	25	000000000	00000
				21/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
				25/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
				29/32"	5/16"	11/64"	32 to 180	Black	Partially Threaded	Not Rated	10	000000000	0000




						6-32

						9/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000


						13/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
						17/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
						21/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
						25/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
						29/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000




								8-32

								9/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000


								13/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
								17/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
								21/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
								25/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
								29/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000




										10-24

										3/8"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000


										1/2"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
										5/8"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
										3/4"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
										7/8"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
										1 1/8"	5/8"	1/4"	32 to 180	Black	Partially Threaded	Not Rated	10	000000000	0000




												10-32

3/8"	5/8"											1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000


1/2"	5/8"											1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
5/8"	5/8"	1/4"										32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
3/4"	5/8"	1/4"	32 to 180									Black	Fully Threaded	Not Rated	10	000000000	0000
7/8"	5/8"	1/4"	32 to 180									Black	Fully Threaded	Not Rated	10	000000000	0000
1 1/8"	5/8"	1/4"	32 to 180									Black	Partially Threaded	Not Rated	10	000000000	0000




		1/4"-20

		3/8"	3/4"									5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000


		1/2"	3/4"									5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
		5/8"	3/4"									5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
		3/4"	3/4"	5/16"								32 to 180	Black	Fully Threaded	Not Rated	10	000000000	0000
		7/8"	3/4"	5/16"	32 to 180							Black	Fully Threaded	Not Rated	10	000000000	00000
		1 1/8"	3/4"	5/16"	32 to 180							Black	Fully Threaded	Not Rated	10	000000000	00000
		1 3/8"	3/4"	5/16"	32 to 180							Black	Partially Threaded	Not Rated	10	000000000	00000




				1/4"-28

				3/8"	3/4"							5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	00000


				1/2"	3/4"							5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	00000
				5/8"	3/4"							5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	000000000	00000
				3/4"	3/4"	5/16"						32 to 180	Black	Fully Threaded	Not Rated	10	000000000	00000
				7/8"	3/4"	5/16"	32 to 180					Black	Fully Threaded	Not Rated	10	000000000	00000
				1 1/8"	3/4"	5/16"	32 to 180					Black	Fully Threaded	Not Rated	10	000000000	00000
				1 3/8"	3/4"	5/16"	32 to 180					Black	Partially Threaded	Not Rated	10	000000000	00000




						5/16"-18

						1/2"	1"					13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000


						5/8"	1"					13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000
						3/4"	1"					13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000
						7/8"	1"	13/32"				32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000
						1 1/8"	1"	13/32"	32 to 180			Black	Fully Threaded	Not Rated	5	000000000	0000
						1 3/8"	1"	13/32"	32 to 180			Black	Fully Threaded	Not Rated	5	000000000	0000




								5/16"-24

								1/2"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000


								5/8"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000
								3/4"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000
								7/8"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000
								1 1/8"	1"	13/32"		32 to 180	Black	Fully Threaded	Not Rated	5	000000000	0000
								1 3/8"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000