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.

					Head						Nuts
	Lg.	Threading	Min. Thread Lg.	Thread Spacing	Wd.	Ht.	Tensile Strength	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 psi	ASME B18.2.1, SAE J429	000000000	00000	100	000000000	00000
				1"	Fully Threaded	__	Coarse	3/8"	11/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	0000
				1 1/4"	Fully Threaded	__	Coarse	3/8"	11/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	0000
				1 1/2"	Fully Threaded	__	Coarse	3/8"	11/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	0000
				2"	Fully Threaded	__	Coarse	3/8"	11/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	0000
				3"	Fully Threaded	__	Coarse	3/8"	11/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	0000
				4"	Fully Threaded	__	Coarse	3/8"	11/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	0000



						5/16"-18 Threads
						3/4"	Fully Threaded	__	Coarse	1/2"	13/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	00000
						1"	Fully Threaded	__	Coarse	1/2"	13/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	00000
						1 1/4"	Fully Threaded	__	Coarse	1/2"	13/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	00000
						1 1/2"	Fully Threaded	__	Coarse	1/2"	13/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	00000
						2"	Fully Threaded	__	Coarse	1/2"	13/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	00000
						3"	Fully Threaded	__	Coarse	1/2"	13/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	00000
						4"	Fully Threaded	__	Coarse	1/2"	13/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	100	000000000	00000



								3/8"-16 Threads
								1"	Fully Threaded	__	Coarse	9/16"	1/4"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	50	000000000	00000
								1 1/2"	Fully Threaded	__	Coarse	9/16"	1/4"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	50	000000000	00000
								2"	Fully Threaded	__	Coarse	9/16"	1/4"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	50	000000000	00000
								2 1/2"	Fully Threaded	__	Coarse	9/16"	1/4"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	50	000000000	00000
								3"	Fully Threaded	__	Coarse	9/16"	1/4"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	50	000000000	00000
								4"	Fully Threaded	__	Coarse	9/16"	1/4"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	50	000000000	00000



										1/2"-13 Threads
										1"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										1 1/4"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										1 1/2"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										2"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										2 1/2"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										3"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										3 1/2"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										4"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										4 1/2"	Partially Threaded	1 1/4"	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	25	000000000	00000
										5"	Fully Threaded	__	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	25	000000000	00000
										6"	Partially Threaded	1 1/4"	Coarse	3/4"	21/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	25	000000000	00000



												5/8"-11 Threads
												2"	Fully Threaded	__	Coarse	15/16"	27/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	10	000000000	0000
												2 1/2"	Fully Threaded	__	Coarse	15/16"	27/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	10	000000000	0000
												3"	Fully Threaded	__	Coarse	15/16"	27/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	10	000000000	0000
												4"	Fully Threaded	__	Coarse	15/16"	27/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	10	000000000	0000
												5"	Fully Threaded	__	Coarse	15/16"	27/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	0000
												6"	Partially Threaded	1 1/2"	Coarse	15/16"	27/64"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	0000



														3/4"-10 Threads
														2"	Fully Threaded	__	Coarse	1 1/8"	1/2"	120,000 psi	ASME B18.2.1, SAE J429	000000000	0000	10	000000000	00000
2 1/2"														Partially Threaded	1 3/4"	Coarse	1 1/8"	1/2"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	00000
3"	Fully Threaded													__	Coarse	1 1/8"	1/2"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	00000
3 1/2"	Partially Threaded													1 3/4"	Coarse	1 1/8"	1/2"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	00000
4"	Fully Threaded	__												Coarse	1 1/8"	1/2"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	00000
5"	Fully Threaded	__	Coarse											1 1/8"	1/2"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	00000
6"	Fully Threaded	__	Coarse											1 1/8"	1/2"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	10	000000000	00000



		1"-8 Threads
		3"	Fully Threaded											__	Coarse	1 1/2"	11/16"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	1	000000000	0000
		4"	Fully Threaded											__	Coarse	1 1/2"	11/16"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	1	000000000	0000
		5"	Fully Threaded											__	Coarse	1 1/2"	11/16"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	1	000000000	0000
		6"	Fully Threaded											__	Coarse	1 1/2"	11/16"	120,000 psi	ASME B18.2.1, SAE J429	000000000	00000	1	000000000	0000