Cadmium-Plated Socket Head Screws

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Titanium Carbon Nitride (TiCN) Coated

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100,000 psi or greater

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DFARS Specialty Metals

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Unified Standard Class 3A

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129 Products

Steel Socket Head Screws

Fully Threaded

Partially Threaded

Made of alloy steel, these screws are the standard for high-strength fastening. Use them in high-load applications such as dies, presses, and heavy equipment. The deep, six-point socket keeps the hex key from slipping out and damaging the drive.

Length is measured from under the head.

Cadmium-Plated Alloy Steel—The plating reduces friction between the screw and your mounting surface to prevent sticking when you tighten or loosen them. It also creates a barrier against rust.

Military Specification—Manufactured and tested to meet strict U.S. military standards for material and construction.

		Head
	Lg.	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Mil. Spec.		Each
Cadmium-Plated Alloy Steel







				2-56

				3/16"	0.14"	0.086"	Fully Threaded	Coarse	160,000	MS16997-1, NAS1352-02-3P	92562A111	00000


				1/4"	0.14"	0.086"	Fully Threaded	Coarse	160,000	MS16997-2, NAS1352-02-4P	92562A112	0000
				3/8"	0.14"	0.086"	Fully Threaded	Coarse	160,000	MS16997-3, NAS1352-02-6P	92562A113	0000
				1/2"	0.14"	0.086"	Fully Threaded	Coarse	160,000	MS16997-4, NAS1352-02-8P	92562A114	0000




						4-40

						1/4"	0.183"	0.112"	Fully Threaded	Coarse	160,000	MS16997-9, NAS1352-04-4P	92562A115	0000


						3/8"	0.183"	0.112"	Fully Threaded	Coarse	160,000	MS16997-10, NAS1352-04-6P	92562A116	0000
						1/2"	0.183"	0.112"	Fully Threaded	Coarse	160,000	MS16997-11, NAS1352-04-8P	92562A117	0000
						5/8"	0.183"	0.112"	Fully Threaded	Coarse	160,000	MS16997-12, NAS1352-04-10P	92562A118	0000
						3/4"	0.183"	0.112"	Fully Threaded	Coarse	160,000	MS16997-13, NAS1352-04-12P	92562A119	0000
						1"	0.183"	0.112"	Partially Threaded	Coarse	160,000	NAS1352-04-16P	92562A120	0000




								6-32

								1/4"	0.226"	0.138"	Fully Threaded	Coarse	160,000	MS16997-18, NAS1352-06-4P	92562A207	0000


								3/8"	0.226"	0.138"	Fully Threaded	Coarse	160,000	MS16997-19, NAS1352-06-6P	92562A121	0000
								1/2"	0.226"	0.138"	Fully Threaded	Coarse	160,000	MS16997-20, NAS1352-06-8P	92562A212	0000
								5/8"	0.226"	0.138"	Fully Threaded	Coarse	160,000	MS16997-21, NAS1352-06-10P	92562A122	0000
								3/4"	0.226"	0.138"	Fully Threaded	Coarse	160,000	MS16997-22, NAS1352-06-12P	92562A214	0000
								7/8"	0.226"	0.138"	Fully Threaded	Coarse	160,000	MS16997-23, NAS1352-06-14P	92562A123	0000
								1"	0.226"	0.138"	Fully Threaded	Coarse	160,000	MS16997-24, NAS1352-06-16P	92562A216	0000




										8-32

										1/4"	0.27"	0.164"	Fully Threaded	Coarse	160,000	MS16997-30, NAS1352-08-4P	92562A711	0000


										3/8"	0.27"	0.164"	Fully Threaded	Coarse	160,000	MS16997-31, NAS1352-08-6P	92562A124	0000
										1/2"	0.27"	0.164"	Fully Threaded	Coarse	160,000	MS16997-32, NAS1352-08-8P	92562A219	0000
										5/8"	0.27"	0.164"	Fully Threaded	Coarse	160,000	MS16997-33, NAS1352-08-10P	92562A125	0000
										3/4"	0.27"	0.164"	Fully Threaded	Coarse	160,000	MS16997-34, NAS1352-08-12P	92562A221	0000
										7/8"	0.27"	0.164"	Fully Threaded	Coarse	160,000	MS16997-35, NAS1352-08-14P	92562A126	0000
										1"	0.27"	0.164"	Fully Threaded	Coarse	160,000	MS16997-36, NAS1352-08-16P	92562A225	0000
										1 1/4"	0.27"	0.164"	Partially Threaded	Coarse	160,000	MS16997-37, NAS1352-08-20P	92562A227	0000
										1 1/2"	0.27"	0.164"	Partially Threaded	Coarse	160,000	MS16997-38, NAS1352-08-24P	92562A229	0000




	10-24

	3/8"										5/16"	0.19"	Fully Threaded	Coarse	160,000	MS16997-43, NAS1352-3-6P	92562A127	0000


	1/2"	5/16"									0.19"	Fully Threaded	Coarse	160,000	MS16997-44, NAS1352-3-8P	92562A234	0000
	5/8"	5/16"	0.19"								Fully Threaded	Coarse	160,000	MS16997-45, NAS1352-3-10P	92562A128	0000
	3/4"	5/16"	0.19"								Fully Threaded	Coarse	160,000	MS16997-46, NAS1352-3-12P	92562A237	0000
	7/8"	5/16"	0.19"								Fully Threaded	Coarse	160,000	MS16997-47, NAS1352-3-14P	92562A129	0000
	1"	5/16"	0.19"								Fully Threaded	Coarse	160,000	MS16997-48, NAS1352-3-16P	92562A239	0000
	1 1/4"	5/16"	0.19"								Partially Threaded	Coarse	160,000	MS16997-49, NAS1352-3-20P	92562A242	0000
	1 1/2"	5/16"	0.19"								Partially Threaded	Coarse	160,000	MS16997-50, NAS1352-3-24P	92562A245	00000
	1 3/4"	5/16"	0.19"								Partially Threaded	Coarse	160,000	MS16997-51, NAS1352-3-28P	92562A247	0000
	2"	5/16"	0.19"								Partially Threaded	Coarse	160,000	MS16997-52, NAS1352-3-32P	92562A253	00000




			10-32

			3/8"	5/16"	0.19"						Fully Threaded	Fine	160,000	MS16998-26, NAS1351-3-6P	92562A130	0000


			1/2"	5/16"	0.19"						Fully Threaded	Fine	160,000	MS16998-27, NAS1351-3-8P	92562A416	0000
			5/8"	5/16"	0.19"						Fully Threaded	Fine	160,000	MS16998-28, NAS1351-3-10P	92562A131	0000
			3/4"	5/16"	0.19"						Fully Threaded	Fine	160,000	MS16998-29, NAS1351-3-12P	92562A428	0000
			7/8"	5/16"	0.19"						Fully Threaded	Fine	160,000	MS16998-30, NAS1351-3-14P	92562A132	0000
			1"	5/16"	0.19"						Fully Threaded	Fine	160,000	MS16998-31, NAS1351-3-16P	92562A434	0000
			1 1/4"	5/16"	0.19"						Partially Threaded	Fine	160,000	MS16998-32, NAS1351-3-20P	92562A133	0000
			1 1/2"	5/16"	0.19"						Partially Threaded	Fine	160,000	MS16998-33, NAS1351-3-24P	92562A134	0000
			1 3/4"	5/16"	0.19"						Partially Threaded	Fine	160,000	MS16998-34, NAS1351-3-28P	92562A135	0000
			2"	5/16"	0.19"						Partially Threaded	Fine	160,000	MS16998-35, NAS1351-3-32P	92562A136	0000




					1/4"-20

					3/8"	3/8"	1/4"				Fully Threaded	Coarse	160,000	MS16997-57, NAS1352-4-6P	92562A712	0000


					1/2"	3/8"	1/4"				Fully Threaded	Coarse	160,000	MS16997-58, NAS1352-4-8P	92562A257	0000
					5/8"	3/8"	1/4"				Fully Threaded	Coarse	160,000	MS16997-59, NAS1352-4-10P	92562A137	0000
					3/4"	3/8"	1/4"				Fully Threaded	Coarse	160,000	MS16997-60, NAS1352-4-12P	92562A263	0000
					7/8"	3/8"	1/4"				Fully Threaded	Coarse	160,000	MS16997-61, NAS1352-4-14P	92562A138	0000
					1"	3/8"	1/4"				Fully Threaded	Coarse	160,000	MS16997-62, NAS1352-4-16P	92562A271	0000
					1 1/4"	3/8"	1/4"				Fully Threaded	Coarse	160,000	MS16997-63, NAS1352-4-20P	92562A273	0000
					1 1/2"	3/8"	1/4"				Partially Threaded	Coarse	160,000	MS16997-64, NAS1352-4-24P	92562A276	0000
					1 3/4"	3/8"	1/4"	Partially Threaded			Coarse	160,000	MS16997-65, NAS1352-4-28P	92562A279	0000
					2"	3/8"	1/4"	Partially Threaded	Coarse		160,000	MS16997-66, NAS1352-4-32P	92562A281	0000
					2 1/4"	3/8"	1/4"	Partially Threaded	Coarse		160,000	MS16997-67, NAS1352-4-36P	92562A139	00000


					2 1/2"	3/8"	1/4"	Partially Threaded	Coarse		160,000	MS16997-68, NAS1352-4-40P	92562A140	00000




							1/4"-28

							1/2"	3/8"	1/4"		Fully Threaded	Fine	160,000	MS16998-41, NAS1351-4-8P	92562A141	0000


5/8"							3/8"	1/4"	Fully Threaded		Fine	160,000	MS16998-42, NAS1351-4-10P	92562A142	0000
3/4"							3/8"	1/4"	Fully Threaded		Fine	160,000	MS16998-43, NAS1351-4-12P	92562A588	0000
7/8"							3/8"	1/4"	Fully Threaded	Fine	160,000	MS16998-44, NAS1351-4-14P	92562A143	0000
1"							3/8"	1/4"	Fully Threaded	Fine	160,000	MS16998-45, NAS1351-4-16P	92562A596	0000
1 1/4"							3/8"	1/4"	Fully Threaded	Fine	160,000	MS16998-46, NAS1351-4-20P	92562A144	0000
1 1/2"							3/8"	1/4"	Partially Threaded	Fine	160,000	MS16998-47, NAS1351-4-24P	92562A605	0000
1 3/4"							3/8"	1/4"	Partially Threaded	Fine	160,000	MS16998-48, NAS1351-4-28P	92562A612	0000
2"							3/8"	1/4"	Partially Threaded	Fine	160,000	MS16998-49, NAS1351-4-32P	92562A145	0000
2 1/4"							3/8"	1/4"	Partially Threaded	Fine	160,000	MS16998-50, NAS1351-4-36P	92562A146	0000




								5/16"-18

								3/4"	15/32"	5/16"	Fully Threaded	Coarse	160,000	MS16997-78, NAS1352-5-12P	92562A299	0000


	7/8"	15/32"						5/16"	Fully Threaded	Coarse	160,000	MS16997-79, NAS1352-5-14P	92562A147	0000
	1"	15/32"						5/16"	Fully Threaded	Coarse	160,000	MS16997-80, NAS1352-5-16P	92562A304	0000
	1 1/4"	15/32"						5/16"	Fully Threaded	Coarse	160,000	MS16997-81, NAS1352-5-20P	92562A306	0000
	1 1/2"	15/32"						5/16"	Fully Threaded	Coarse	160,000	MS16997-82, NAS1352-5-24P	92562A309	0000
	1 3/4"	15/32"						5/16"	Partially Threaded	Coarse	160,000	MS16997-83, NAS1352-5-28P	92562A312	00000
	2"	15/32"						5/16"	Partially Threaded	Coarse	160,000	MS16997-84, NAS1352-5-32P	92562A315	00000
	2 1/2"	15/32"						5/16"	Partially Threaded	Coarse	160,000	MS16997-86, NAS1352-5-40P	92562A148	00000




								3/8"-16

								1/2"	9/16"	3/8"	Fully Threaded	Coarse	160,000	MS16997-95, NAS1352-6-8P	92562A149	00000


								3/4"	9/16"	3/8"	Fully Threaded	Coarse	160,000	MS16997-97, NAS1352-6-12P	92562A341	00000
			1"					9/16"	3/8"	Fully Threaded	Coarse	160,000	MS16997-99, NAS1352-6-16P	92562A346	0000
			1 1/4"	9/16"				3/8"	Fully Threaded	Coarse	160,000	MS16997-100, NAS1352-6-20P	92562A349	0000
			1 1/2"	9/16"				3/8"	Fully Threaded	Coarse	160,000	MS16997-101, NAS1352-6-24P	92562A352	0000
			1 3/4"	9/16"				3/8"	Partially Threaded	Coarse	160,000	MS16997-102, NAS1352-6-28P	92562A355	00000
			2"	9/16"				3/8"	Partially Threaded	Coarse	160,000	MS16997-103, NAS1352-6-32P	92562A358	00000
			2 1/4"	9/16"				3/8"	Partially Threaded	Coarse	160,000	MS16997-104, NAS1352-6-36P	92562A361	00000
			2 1/2"	9/16"				3/8"	Partially Threaded	Coarse	160,000	MS16997-105, NAS1352-6-40P	92562A364	00000
			2 3/4"	9/16"				3/8"	Partially Threaded	Coarse	160,000	MS16997-106, NAS1352-6-44P	92562A367	00000

Steel Cup-Tip Set Screws

Made of alloy steel, these screws are strong enough to hold components without wearing down. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.

Cadmium-Plated Alloy Steel—The plating reduces friction between the screw and your mounting surface to prevent sticking when tightening and loosening. It also creates a barrier against rust.

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

	Drive Size	Hardness	Mil. Spec.		Each
Cadmium-Plated Alloy Steel







			2-56

			1/8"	0.035"	Rockwell C45	MS51963-1	98637A016	00000


			3/16"	0.035"	Rockwell C45	MS51963-2	98637A019	0000
			1/4"	0.035"	Rockwell C45	MS51963-3	98637A022	0000




					4-40

					1/8"	0.050"	Rockwell C45	MS51963-9	98637A103	0000


					3/16"	0.050"	Rockwell C45	MS51963-10	98637A105	0000
					1/4"	0.050"	Rockwell C45	MS51963-11	98637A111	0000
					1/2"	0.050"	Rockwell C45	MS51963-15	98637A123	0000




							6-32

							1/8"	1/16"	Rockwell C45	MS51963-20	98637A142	0000


							3/16"	1/16"	Rockwell C45	MS51963-21	98637A146	0000
							1/4"	1/16"	Rockwell C45	MS51963-22	98637A151	0000
							3/8"	1/16"	Rockwell C45	MS51963-24	98637A155	0000




									8-32

									1/8"	5/64"	Rockwell C45	MS51963-33	98637A278	0000


									3/16"	5/64"	Rockwell C45	MS51963-34	98637A283	0000
									1/4"	5/64"	Rockwell C45	MS51963-35	98637A286	0000
									3/8"	5/64"	Rockwell C45	MS51963-37	98637A289	0000
									1/2"	5/64"	Rockwell C45	MS51963-39	98637A292	0000




											10-32

											3/16"	3/32"	Rockwell C45	MS51964-48	98637A351	0000


											1/4"	3/32"	Rockwell C45	MS51964-49	98637A356	0000
											3/8"	3/32"	Rockwell C45	MS51964-51	98637A365	0000
											1/2"	3/32"	Rockwell C45	MS51964-53	98637A368	0000




											1/4"-20

	1/4"										1/8"	Rockwell C45	MS51963-63	98637A401	0000


	3/8"	1/8"									Rockwell C45	MS51963-65	98637A410	0000
	1/2"	1/8"									Rockwell C45	MS51963-67	98637A416	0000




											1/4"-28

			1/4"								1/8"	Rockwell C45	MS51964-64	98637A527	0000


			5/16"	1/8"							Rockwell C45	MS51964-65	98637A533	0000
			3/8"	1/8"							Rockwell C45	MS51964-66	98637A538	0000
			1/2"	1/8"							Rockwell C45	MS51964-68	98637A542	0000

Steel Hex-Drive Flat Head Screws

Our strongest hex-drive flat head screws. They're made of alloy steel, so they have nearly twice the tensile strength of other screws. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.

Length is measured from the top of the head.

Cadmium-Plated Alloy Steel—The plating reduces friction between the screw and your mounting surface to prevent sticking when you tighten or loosen them. It also creates a barrier against rust.

Standard Profile—Standard-profile heads are the most common choice for flat head screws.

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

				Head
	Lg.	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Mil. Spec.		Each
Cadmium-Plated Alloy Steel







				4-40

				1/4"	82°	Standard	0.255"	0.083"	Fully Threaded	140,000	MS24667-1	93401A100	00000


				3/8"	82°	Standard	0.255"	0.083"	Fully Threaded	140,000	MS24667-2	93401A102	0000
				1/2"	82°	Standard	0.255"	0.083"	Fully Threaded	140,000	MS24667-3	93401A110	0000
				3/4"	82°	Standard	0.255"	0.083"	Fully Threaded	140,000	MS24667-5	93401A108	0000




						6-32

						3/8"	82°	Standard	0.307"	0.097"	Fully Threaded	140,000	MS24667-8	93401A203	0000


						1/2"	82°	Standard	0.307"	0.097"	Fully Threaded	140,000	MS24667-9	93401A205	0000
						5/8"	82°	Standard	0.307"	0.097"	Fully Threaded	140,000	MS24667-10	93401A207	00000
						3/4"	82°	Standard	0.307"	0.097"	Fully Threaded	140,000	MS24667-11	93401A209	0000




								8-32

								3/8"	82°	Standard	0.359"	0.112"	Fully Threaded	140,000	MS24667-13	93401A305	0000


								1/2"	82°	Standard	0.359"	0.112"	Fully Threaded	140,000	MS24667-14	93401A307	0000
								5/8"	82°	Standard	0.359"	0.112"	Fully Threaded	140,000	MS24667-15	93401A309	0000




										1/4"-20

										5/8"	82°	Standard	0.531"	0.161"	Fully Threaded	140,000	MS24667-29	93401A507	0000


										3/4"	82°	Standard	0.531"	0.161"	Fully Threaded	140,000	MS24667-30	93401A611	0000
										1"	82°	Standard	0.531"	0.161"	Fully Threaded	140,000	MS24667-31	93401A612	00000




												5/16"-18

												1"	82°	Standard	0.656"	0.198"	Fully Threaded	140,000	MS24667-41	93401A560	00000




														3/8"-16

														1"	82°	Standard	0.781"	0.234"	Fully Threaded	140,000	MS24667-52	93401A610	00000