Countersunk Head Shoulder Screws

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Unified Standard Class 3A

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Yes

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Compliant

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EAR99

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99 Products

Fastener Head Type

Headless

Flush mount for clearance in tight spaces or use as aligning pins

55 products

Flat

Flush mount to prevent snags around moving parts

44 products

Performance

Precision

Twice as precise as standard-fit for smooth, accurate movement

55 products

High Strength

Withstand heavy loads and high stress without breaking

55 products

Steel Headless Slotted Precision Shoulder Screws

With no head, you can flush mount these screws in counterbored holes and tight spaces. You can also use them as pins for aligning parts. 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. Hand-tighten with a slotted screwdriver to avoid damaging the drive.

	Shoulder Lg.	Thread Size	Thread Lg.	Tensile Strength	Specs. Met	Material Certificate Form	Pkg. Qty.		Pkg.
Alloy Steel







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

				1/8"	4-40	5/32"	Not Rated	—	—	1	94128A141	00000


				1/4"	4-40	5/32"	Not Rated	—	—	1	94128A142	0000
				3/8"	4-40	5/32"	Not Rated	—	—	1	94128A143	0000
				1/2"	4-40	5/32"	Not Rated	—	—	1	94128A144	0000
				5/8"	4-40	5/32"	Not Rated	—	—	1	94128A145	0000
				3/4"	4-40	5/32"	Not Rated	—	—	1	94128A146	0000




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

						1/8"	8-32	3/16"	Not Rated	—	—	1	94128A147	0000


						1/4"	8-32	3/16"	Not Rated	—	Digital	1	94128A148	0000
						3/8"	8-32	3/16"	Not Rated	—	—	1	94128A149	0000
						1/2"	8-32	3/16"	Not Rated	—	—	1	94128A151	0000
						5/8"	8-32	3/16"	Not Rated	—	—	1	94128A152	0000
						3/4"	8-32	3/16"	Not Rated	—	—	1	94128A153	0000




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

								1/8"	10-32	1/4"	Not Rated	—	—	1	94128A154	0000


								1/4"	10-32	1/4"	Not Rated	—	—	1	94128A155	0000
								3/8"	10-32	1/4"	Not Rated	—	—	1	94128A156	0000
								1/2"	10-32	1/4"	Not Rated	—	—	1	94128A157	0000
								5/8"	10-32	1/4"	Not Rated	—	—	1	94128A158	0000
								3/4"	10-32	1/4"	Not Rated	—	Digital	1	94128A159	0000




										5/16" Diameter Shoulder (-0.001" to 0" Tolerance)

										1/4"	1/4"-20	7/16"	Not Rated	—	—	1	94128A161	0000


										3/8"	1/4"-20	7/16"	Not Rated	—	—	1	94128A162	0000
										1/2"	1/4"-20	7/16"	Not Rated	—	—	1	94128A163	0000
										5/8"	1/4"-20	7/16"	Not Rated	—	—	1	94128A164	0000
										3/4"	1/4"-20	7/16"	Not Rated	—	—	1	94128A165	0000
										1"	1/4"-20	7/16"	Not Rated	—	—	1	94128A166	0000




												3/8" Diameter Shoulder (-0.001" to 0" Tolerance)

1/4"	5/16"-18											1/2"	Not Rated	—	—	1	94128A167	0000


3/8"	5/16"-18											1/2"	Not Rated	—	—	1	94128A168	0000
1/2"	5/16"-18	1/2"										Not Rated	—	—	1	94128A169	0000
5/8"	5/16"-18	1/2"	Not Rated									—	—	1	94128A171	0000
3/4"	5/16"-18	1/2"	Not Rated									—	—	1	94128A172	0000
1"	5/16"-18	1/2"	Not Rated									—	—	1	94128A173	0000




		1/2" Diameter Shoulder (-0.001" to 0" Tolerance)

		1/4"	3/8"-16									5/8"	Not Rated	—	—	1	94128A174	0000


		3/8"	3/8"-16									5/8"	Not Rated	—	—	1	94128A175	0000
		1/2"	3/8"-16									5/8"	Not Rated	—	—	1	94128A176	0000
		5/8"	3/8"-16	5/8"								Not Rated	—	—	1	94128A177	00000
		3/4"	3/8"-16	5/8"	Not Rated							—	Digital	1	94128A178	00000
		1"	3/8"-16	5/8"	Not Rated							—	—	1	94128A179	00000




				4 mm Diameter Shoulder (-0.03 mm to 0 mm Tolerance)

				3 mm	M3 × 0.5 mm							4.5 mm	Not Rated	DIN 927	—	10	94128A101	0000


				4 mm	M3 × 0.5 mm							4.5 mm	Not Rated	DIN 927	—	10	94128A102	0000
				5 mm	M3 × 0.5 mm							4.5 mm	Not Rated	DIN 927	—	10	94128A103	0000
				6 mm	M3 × 0.5 mm							4.5 mm	Not Rated	DIN 927	—	10	94128A104	0000
				8 mm	M3 × 0.5 mm	4.5 mm						Not Rated	DIN 927	—	10	94128A105	0000




						5.5 mm Diameter Shoulder (-0.03 mm to 0 mm Tolerance)

						4 mm	M4 × 0.7 mm					6 mm	Not Rated	DIN 927	—	5	94128A106	0000


						5 mm	M4 × 0.7 mm					6 mm	Not Rated	DIN 927	—	5	94128A107	0000
						6 mm	M4 × 0.7 mm					6 mm	Not Rated	DIN 927	—	5	94128A108	0000
						8 mm	M4 × 0.7 mm					6 mm	Not Rated	DIN 927	—	5	94128A109	0000
						10 mm	M4 × 0.7 mm					6 mm	Not Rated	DIN 927	—	5	94128A110	0000




								6.5 mm Diameter Shoulder (-0.036 mm to 0 mm Tolerance)

								5 mm	M5 × 0.8 mm			7 mm	Not Rated	DIN 927	—	10	94128A111	0000


								6 mm	M5 × 0.8 mm			7 mm	Not Rated	DIN 927	—	10	94128A112	0000
								8 mm	M5 × 0.8 mm			7 mm	Not Rated	DIN 927	—	5	94128A113	0000
								10 mm	M5 × 0.8 mm			7 mm	Not Rated	DIN 927	—	5	94128A114	0000
								12 mm	M5 × 0.8 mm			7 mm	Not Rated	DIN 927	—	5	94128A115	00000




										8 mm Diameter Shoulder (-0.036 mm to 0 mm Tolerance)

										8 mm	M6 × 1 mm	8 mm	Not Rated	DIN 927	—	5	94128A116	0000


										10 mm	M6 × 1 mm	8 mm	Not Rated	DIN 927	—	5	94128A117	00000
										12 mm	M6 × 1 mm	8 mm	Not Rated	DIN 927	—	5	94128A118	0000




										10 mm Diameter Shoulder (-0.07 mm to 0 mm Tolerance)

										16 mm	M8 × 1.25 mm	11 mm	Not Rated	DIN 927	—	1	94128A119	0000

Stainless Steel Flat Head Hex-Drive Shoulder Screws

Create a smooth surface to avoid snags or catches in tight assemblies or around moving machinery. These screws have a flat head that sits flush with your surface or just below it.

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.	Countersink Angle	Dia.	Ht.	Drive Size	Tensile Strength, psi	Material Certificate Form		1-4	5-Up
18-8 Stainless Steel







				1/4" Diameter Shoulder (-0.004" to -0.002" Tolerance)

				1/4"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	—	92944A111	00000	00000


				3/8"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	—	92944A112	0000	0000
				1/2"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	—	92944A113	0000	0000
				5/8"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	Digital	92944A114	0000	0000
				3/4"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	—	92944A115	0000	0000
				1"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	—	92944A116	00000	0000
				1 1/4"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	—	92944A117	00000	00000
				1 1/2"	10-24	3/8"	82°	0.531"	0.161"	5/32"	70,000	Digital	92944A118	00000	00000




						5/16" Diameter Shoulder (-0.004" to -0.002" Tolerance)

						1/4"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A119	0000	0000


						3/8"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A121	0000	0000
						1/2"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A122	00000	0000
						5/8"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A123	00000	0000
						3/4"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A124	00000	0000
						1"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A125	00000	00000
						1 1/4"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A126	00000	00000
						1 1/2"	1/4"-20	7/16"	82°	0.656"	0.198"	3/16"	70,000	—	92944A127	00000	00000




								3/8" Diameter Shoulder (-0.004" to -0.002" Tolerance)

								1/4"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	Digital	92944A128	0000	0000


								3/8"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	—	92944A129	00000	0000
								1/2"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	—	92944A131	00000	0000
								5/8"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	—	92944A132	00000	0000
								3/4"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	—	92944A133	00000	00000
								1"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	Digital	92944A134	00000	00000
								1 1/4"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	—	92944A135	00000	00000
								1 1/2"	5/16"-18	1/2"	82°	0.781"	0.234"	7/32"	70,000	—	92944A136	00000	00000




										1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance)

										3/8"	3/8"-16	5/8"	82°	0.937"	0.251"	5/16"	70,000	—	92944A137	00000	0000


										1/2"	3/8"-16	5/8"	82°	0.937"	0.251"	5/16"	70,000	—	92944A138	00000	0000
										5/8"	3/8"-16	5/8"	82°	0.937"	0.251"	5/16"	70,000	—	92944A139	00000	00000
										3/4"	3/8"-16	5/8"	82°	0.937"	0.251"	5/16"	70,000	—	92944A141	00000	00000
										1"	3/8"-16	5/8"	82°	0.937"	0.251"	5/16"	70,000	—	92944A142	00000	00000
1 1/4"										3/8"-16	5/8"	82°	0.937"	0.251"	5/16"	70,000	—	92944A143	00000	00000
1 1/2"	3/8"-16									5/8"	82°	0.937"	0.251"	5/16"	70,000	Digital	92944A144	00000	00000
2"	3/8"-16									5/8"	82°	0.937"	0.251"	5/16"	70,000	—	92944A145	00000	00000

Shoulder Shims

Shoulder

Lengthening

Shoulder Lengthening—Wiggle over threads to add space or increase travel along the shoulder of screws. Stack these shims to get the exact spacing you need.

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







				For 1/4" Diameter Shoulder

				0.005"	No. 10	50	90135A431	000000


				0.016"	No. 10	50	90135A443	00000
				0.03"	No. 10	25	90135A455	0000




						For 5/16" Diameter Shoulder

						0.005"	1/4"	50	90135A433	00000


						0.016"	1/4"	25	90135A445	0000
						0.03"	1/4"	25	90135A457	00000




								For 3/8" Diameter Shoulder

								0.005"	5/16"	50	90135A435	00000


								0.016"	5/16"	25	90135A447	00000
								0.03"	5/16"	25	90135A459	00000




										For 1/2" Diameter Shoulder

										0.005"	3/8"	25	90135A437	00000


										0.016"	3/8"	25	90135A449	00000
										0.03"	3/8"	25	90135A461	00000