NASM35190 Flat Head Screws

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Unified Standard Class 2A

Tensile Strength

60,000 psi to 69,999 psi

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16 Products

Steel Phillips Flat Head Screws

One of the most common drive styles. Phillips drives have a cross-shaped opening in which a driver fits snugly for easy alignment. With four contact points, they withstand more torque than slotted drives, but drivers slip when you apply too much force.

Length is measured from the top of the head.

Cadmium-Plated 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.

Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.

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	Specs. Met	Mil. Spec.	Pkg. Qty.		Pkg.
Cadmium-Plated Steel







				4-40

				3/16"	82°	Undercut	0.225"	0.047"	Fully Threaded	60,000	NASM35190	MS35190-220	100	000000000	000000


				1/4"	82°	Standard	0.225"	0.067"	Fully Threaded	60,000	NASM35190	MS35190-221	100	000000000	00000
				3/8"	82°	Standard	0.225"	0.067"	Fully Threaded	60,000	NASM35190	MS35190-223	100	000000000	00000
				1/2"	82°	Standard	0.225"	0.067"	Fully Threaded	60,000	NASM35190	MS35190-225	100	000000000	00000




						6-32

						1/4"	82°	Standard	0.279"	0.083"	Fully Threaded	60,000	NASM35190	MS35190-234	100	000000000	00000


						3/8"	82°	Standard	0.279"	0.083"	Fully Threaded	60,000	NASM35190	MS35190-236	100	000000000	00000
						1/2"	82°	Standard	0.279"	0.083"	Fully Threaded	60,000	NASM35190	MS35190-238	100	000000000	00000
						3/4"	82°	Standard	0.279"	0.083"	Fully Threaded	60,000	NASM35190	MS35190-240	100	000000000	00000




								8-32

								1/4"	82°	Undercut	0.332"	0.07"	Fully Threaded	60,000	NASM35190	MS35190-249	100	000000000	00000


								3/8"	82°	Standard	0.332"	0.1"	Fully Threaded	60,000	NASM35190	MS35190-251	100	000000000	00000
								1/2"	82°	Standard	0.332"	0.1"	Fully Threaded	60,000	NASM35190	MS35190-253	100	000000000	00000
								3/4"	82°	Standard	0.332"	0.1"	Fully Threaded	60,000	NASM35190	MS35190-255	100	000000000	00000




										1/4"-20

										1/2"	82°	Standard	0.507"	0.153"	Fully Threaded	60,000	NASM35190	MS35190-287	25	000000000	00000


										3/4"	82°	Standard	0.507"	0.153"	Fully Threaded	60,000	NASM35190	MS35190-289	25	000000000	00000
										1"	82°	Standard	0.507"	0.153"	Fully Threaded	60,000	NASM35190	MS35190-291	25	000000000	00000
										1 1/2"	82°	Standard	0.507"	0.153"	Fully Threaded	60,000	NASM35190	MS35190-293	25	000000000	00000