SAE Square Head Bolts | McMaster-Carr

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55 Products

Medium-Strength SAE Grade 5 Steel Square Head Screws


Fully Threaded	Partially Threaded

Made from Grade 5 steel, these screws are suitable for fastening most machinery and equipment. Large flat sides make them easy to grip with a wrench and keep them from rotating in square holes. A zinc yellow-chromate plating provides corrosion resistance in wet environments. Grade 5 steel square head screws are marked with three radial lines. Material meets SAE J429 specifications for quality. Dimensions meet ASME B18.2.1 specifications. Length is measured from under the head.

	Square Head Screws										Nuts
					Head
	Lg.	Threading	Min. Thread Lg.	Thread Spacing	Wd.	Ht.	Tensile Strength, psi	Specs. Met		Each	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel





				1/4"-20 Threads

				3/4"	Fully Threaded	—	Coarse	3/8"	11/64"	120,000	ASME B18.2.1, SAE J429	92327A810	00000	100	98694A110	00000
				1"	Fully Threaded	—	Coarse	3/8"	11/64"	120,000	ASME B18.2.1, SAE J429	92327A811	0000	100	98694A110	0000
				1 1/4"	Fully Threaded	—	Coarse	3/8"	11/64"	120,000	ASME B18.2.1, SAE J429	92327A812	0000	100	98694A110	0000
				1 1/2"	Fully Threaded	—	Coarse	3/8"	11/64"	120,000	ASME B18.2.1, SAE J429	92327A813	0000	100	98694A110	0000
				2"	Fully Threaded	—	Coarse	3/8"	11/64"	120,000	ASME B18.2.1, SAE J429	92327A814	00000	100	98694A110	0000
				3"	Fully Threaded	—	Coarse	3/8"	11/64"	120,000	ASME B18.2.1, SAE J429	92327A111	00000	100	98694A110	0000
				4"	Fully Threaded	—	Coarse	3/8"	11/64"	120,000	ASME B18.2.1, SAE J429	92327A112	00000	100	98694A110	0000




						5/16"-18 Threads

						3/4"	Fully Threaded	—	Coarse	1/2"	13/64"	120,000	ASME B18.2.1, SAE J429	92327A815	0000	100	98694A115	00000
						1"	Fully Threaded	—	Coarse	1/2"	13/64"	120,000	ASME B18.2.1, SAE J429	92327A816	0000	100	98694A115	00000
						1 1/4"	Fully Threaded	—	Coarse	1/2"	13/64"	120,000	ASME B18.2.1, SAE J429	92327A817	00000	100	98694A115	00000
						1 1/2"	Fully Threaded	—	Coarse	1/2"	13/64"	120,000	ASME B18.2.1, SAE J429	92327A818	00000	100	98694A115	00000
						2"	Fully Threaded	—	Coarse	1/2"	13/64"	120,000	ASME B18.2.1, SAE J429	92327A819	00000	100	98694A115	00000
						3"	Fully Threaded	—	Coarse	1/2"	13/64"	120,000	ASME B18.2.1, SAE J429	92327A113	00000	100	98694A115	00000
						4"	Fully Threaded	—	Coarse	1/2"	13/64"	120,000	ASME B18.2.1, SAE J429	92327A114	00000	100	98694A115	00000




								3/8"-16 Threads

								1"	Fully Threaded	—	Coarse	9/16"	1/4"	120,000	ASME B18.2.1, SAE J429	92327A279	0000	50	98694A120	00000
								1 1/2"	Fully Threaded	—	Coarse	9/16"	1/4"	120,000	ASME B18.2.1, SAE J429	92327A283	0000	50	98694A120	00000
								2"	Fully Threaded	—	Coarse	9/16"	1/4"	120,000	ASME B18.2.1, SAE J429	92327A288	0000	50	98694A120	00000
								2 1/2"	Fully Threaded	—	Coarse	9/16"	1/4"	120,000	ASME B18.2.1, SAE J429	92327A820	0000	50	98694A120	00000
								3"	Fully Threaded	—	Coarse	9/16"	1/4"	120,000	ASME B18.2.1, SAE J429	92327A291	0000	50	98694A120	00000
								4"	Fully Threaded	—	Coarse	9/16"	1/4"	120,000	ASME B18.2.1, SAE J429	92327A294	0000	50	98694A120	00000




										1/2"-13 Threads

										1"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A821	0000	25	98694A130	00000
										1 1/4"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A822	0000	25	98694A130	00000
										1 1/2"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A823	0000	25	98694A130	00000
										2"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A304	0000	25	98694A130	00000
										2 1/2"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A308	0000	25	98694A130	00000
										3"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A311	0000	25	98694A130	00000
										3 1/2"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A824	0000	25	98694A130	00000
										4"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A314	0000	25	98694A130	00000
										4 1/2"	Partially Threaded	1 1/4"	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A115	00000	25	98694A130	00000
										5"	Fully Threaded	—	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A317	0000	25	98694A130	00000


										6"	Partially Threaded	1 1/4"	Coarse	3/4"	21/64"	120,000	ASME B18.2.1, SAE J429	92327A116	00000	25	98694A130	00000




												5/8"-11 Threads

2"												Fully Threaded	—	Coarse	15/16"	27/64"	120,000	ASME B18.2.1, SAE J429	92327A323	0000	10	98694A135	0000
2 1/2"	Fully Threaded											—	Coarse	15/16"	27/64"	120,000	ASME B18.2.1, SAE J429	92327A327	0000	10	98694A135	0000
3"	Fully Threaded											—	Coarse	15/16"	27/64"	120,000	ASME B18.2.1, SAE J429	92327A332	0000	10	98694A135	0000
4"	Fully Threaded	—										Coarse	15/16"	27/64"	120,000	ASME B18.2.1, SAE J429	92327A338	0000	10	98694A135	0000
5"	Fully Threaded	—	Coarse									15/16"	27/64"	120,000	ASME B18.2.1, SAE J429	92327A341	0000	10	98694A135	0000
6"	Partially Threaded	1 1/2"	Coarse									15/16"	27/64"	120,000	ASME B18.2.1, SAE J429	92327A117	00000	10	98694A135	0000




		3/4"-10 Threads

		2"	Fully Threaded									—	Coarse	1 1/8"	1/2"	120,000	ASME B18.2.1, SAE J429	92327A825	0000	10	98694A140	00000
		2 1/2"	Partially Threaded									1 3/4"	Coarse	1 1/8"	1/2"	120,000	ASME B18.2.1, SAE J429	92327A118	00000	10	98694A140	00000
		3"	Fully Threaded									—	Coarse	1 1/8"	1/2"	120,000	ASME B18.2.1, SAE J429	92327A362	0000	10	98694A140	00000
		3 1/2"	Partially Threaded									1 3/4"	Coarse	1 1/8"	1/2"	120,000	ASME B18.2.1, SAE J429	92327A119	00000	10	98694A140	00000
		4"	Fully Threaded									—	Coarse	1 1/8"	1/2"	120,000	ASME B18.2.1, SAE J429	92327A365	0000	10	98694A140	00000
		5"	Fully Threaded	—								Coarse	1 1/8"	1/2"	120,000	ASME B18.2.1, SAE J429	92327A367	00000	10	98694A140	00000
		6"	Fully Threaded	—	Coarse							1 1/8"	1/2"	120,000	ASME B18.2.1, SAE J429	92327A369	00000	10	98694A140	00000




				1"-8 Threads

				3"	Fully Threaded							—	Coarse	1 1/2"	11/16"	120,000	ASME B18.2.1, SAE J429	92327A413	00000	1	98694A150	0000
				4"	Fully Threaded							—	Coarse	1 1/2"	11/16"	120,000	ASME B18.2.1, SAE J429	92327A419	00000	1	98694A150	0000
				5"	Fully Threaded							—	Coarse	1 1/2"	11/16"	120,000	ASME B18.2.1, SAE J429	92327A425	00000	1	98694A150	0000
				6"	Fully Threaded							—	Coarse	1 1/2"	11/16"	120,000	ASME B18.2.1, SAE J429	92327A431	00000	1	98694A150	0000