MS 51957 Machine Screws | McMaster-Carr

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NASM51576

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Unified Standard Class 2A

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

Yes

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UNC

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30,000 psi to 99,999 psi

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104 Products

Stainless Steel Pan Head Phillips Screws

These stainless steel pan head Phillips screws won't rust or corrode when exposed to moisture and chemicals. They have a moderate height and width profile, offering a middle ground between narrower button heads and wider truss heads. The Phillips drive easily aligns with drivers and withstands more torque than slotted drives, but drivers slip when you apply too much force.

Length is measured from under the head.

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

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They won't rust in wet and outdoor environments, but they don't hold up to the harsh chemicals that 316 stainless steel can.

Military Specification—These screws are manufactured and tested to meet strict U.S. military standards for material and construction.

		Head
	Lg.	Dia.	Ht.	Threading	Tensile Strength, psi	Mil. Spec.	Certificate Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				2-56

				1/8"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-1	—	100	91400A050	00000


				3/16"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-2	—	100	91400A052	0000
				1/4"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-3	—	100	91400A054	0000
				5/16"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-4	—	100	91400A056	0000
				3/8"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-5	—	100	91400A058	0000
				7/16"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-6	—	100	91400A060	0000
				1/2"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-7	—	100	91400A062	00000
				9/16"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-141	—	100	91400A063	00000
				5/8"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-8	—	100	91400A064	00000
				3/4"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-9	—	100	91400A066	00000
				7/8"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-10	—	25	91400A068	00000


				1"	0.167"	0.062"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-142	—	50	91400A069	00000




						4-40

						1/8"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-11	—	100	91400A101	00000


						3/16"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-12	—	100	91400A104	00000
						1/4"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-13	—	100	91400A106	0000
						5/16"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-14	—	100	91400A107	0000
						3/8"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-15	—	100	91400A108	00000
						7/16"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-16	—	100	91400A112	00000
						1/2"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-17	—	100	91400A110	00000
						9/16"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-120	—	100	91400A111	00000
						5/8"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-18	—	100	91400A114	0000
						3/4"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-19	—	100	91400A116	00000
						7/8"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-20	—	50	91400A118	0000


						1"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-21	—	50	91400A119	00000
						1 1/8"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-121	—	50	91400A121	00000
						1 1/4"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-22	—	50	91400A124	00000
						1 3/8"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-122	—	50	91400A127	00000
						1 1/2"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-23	Material Certificate	10	91400A130	0000




								6-32

								1/8"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-24	—	50	91400A142	00000


								3/16"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-25	—	100	91400A143	00000
								1/4"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-26	—	100	91400A144	00000
								5/16"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-27	—	100	91400A145	00000
								3/8"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-28	Material Certificate	100	91400A146	00000
7/16"								0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-29	—	100	91400A149	00000
1/2"	0.27"							0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-30	—	100	91400A148	00000
9/16"	0.27"							0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-123	—	50	91400A147	00000
5/8"	0.27"							0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-31	—	50	91400A150	00000
3/4"	0.27"							0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-32	Material Certificate	50	91400A151	0000
7/8"	0.27"	0.097"						Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-33	—	50	91400A152	00000


1"	0.27"	0.097"	Fully Threaded					80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-34	—	50	91400A154	00000
1 1/8"	0.27"	0.097"	Fully Threaded					80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-124	—	25	91400A155	0000
1 1/4"	0.27"	0.097"	Fully Threaded					80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-35	—	25	91400A156	0000
1 3/8"	0.27"	0.097"	Fully Threaded					80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-125	—	25	91400A157	0000
1 1/2"	0.27"	0.097"	Fully Threaded					80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-36	—	25	91400A158	0000
1 3/4"	0.27"	0.097"	Fully Threaded					80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-37	—	25	91400A160	00000
2"	0.27"	0.097"	Fully Threaded					80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-38	—	25	91400A162	00000




		8-32

		3/16"	0.322"					0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-40	—	50	91400A189	00000


		1/4"	0.322"					0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-41	—	50	91400A190	0000
		5/16"	0.322"					0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-42	Material Certificate	50	91400A191	0000
		3/8"	0.322"					0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-43	Material Certificate	50	91400A192	0000
		7/16"	0.322"					0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-44	—	50	91400A193	0000
		1/2"	0.322"	0.115"				Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-45	—	50	91400A194	00000
		9/16"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-126	—	25	91400A195	00000
		5/8"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-46	Material Certificate	25	91400A196	0000
		3/4"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-47	—	25	91400A197	0000
		7/8"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-48	—	25	91400A198	0000
		1"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-49	Material Certificate	25	91400A199	00000


		1 1/4"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-50	Material Certificate	25	91400A201	00000
		1 1/2"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-51	—	25	91400A203	00000
		1 3/4"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-52	Material Certificate	25	91400A204	00000
		2"	0.322"	0.115"	Fully Threaded			80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-53	Material Certificate	25	91400A206	00000




				10-24

				1/4"	0.373"			0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-59	Material Certificate	50	91400A238	00000


				5/16"	0.373"			0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-60	Material Certificate	50	91400A239	00000
				3/8"	0.373"			0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-61	—	50	91400A240	00000
				1/2"	0.373"			0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-63	Material Certificate	50	91400A242	00000
				5/8"	0.373"			0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-64	Material Certificate	50	91400A244	00000
				3/4"	0.373"			0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-65	—	25	91400A245	00000
				1"	0.373"			0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-67, NASM51576	—	25	91400A247	00000
				1 1/4"	0.373"	0.133"		Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-68	—	25	91400A251	00000
				1 1/2"	0.373"	0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-69	Material Certificate	25	91400A255	00000
				2"	0.373"	0.133"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-71	Material Certificate	10	91400A257	00000




						1/4"-20

						5/16"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-76	Material Certificate	25	91400A535	00000


						3/8"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-77	Material Certificate	25	91400A536	00000
						1/2"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-79	—	25	91400A537	00000
						5/8"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-80	—	25	91400A539	00000
						3/4"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-81	—	25	91400A540	00000
						7/8"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-82	—	10	91400A541	00000
						1"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-83	—	10	91400A542	0000
						1 1/4"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-84	—	10	91400A544	00000
						1 1/2"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-85	—	10	91400A546	00000
						2"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-87	Material Certificate	10	91400A548	00000




								5/16"-18

1/2"	0.615"							0.218"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-94	Material Certificate	10	91400A903	00000


3/4"	0.615"							0.218"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-96	—	10	91400A904	00000
1"	0.615"							0.218"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-98	—	10	91400A905	00000
1 1/2"	0.615"							0.218"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-100	—	10	91400A906	00000
2"	0.615"							0.218"	Fully Threaded	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51957-102	—	5	91400A907	00000


Black-Oxide 18-8 Stainless Steel







										4-40

										3/16"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-12B	—	25	90988A011	0000


										1/4"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-13B	—	25	90988A012	0000
										3/8"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-15B	—	25	90988A014	0000
										1/2"	0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-17B	—	25	90988A016	0000
		3/4"								0.219"	0.08"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-19B	—	25	90988A018	0000




										6-32

										1/4"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-26B	Material Certificate	25	90988A041	0000


										3/8"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-28B	—	25	90988A042	00000
										1/2"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-30B	—	25	90988A044	0000
										3/4"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-32B	—	25	90988A046	00000
										1"	0.27"	0.097"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-34B	—	10	90988A048	0000




				8-32

				1/4"	0.322"							0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-41B	—	25	90988A071	0000


				3/8"	0.322"							0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-43B	—	25	90988A072	00000
				1/2"	0.322"							0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-45B	—	10	90988A074	0000
				3/4"	0.322"							0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-47B	—	10	90988A076	0000
				1"	0.322"							0.115"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-49B	—	10	90988A078	0000




												1/4"-20

												1/2"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-79B	—	5	90988A252	0000


												3/4"	0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-81B	—	5	90988A254	0000
						1"						0.492"	0.175"	Fully Threaded	80,000	Fed. Spec. FF-S-92, MS51957-83B	Material Certificate	5	90988A256	00000