7/16"-20 Set Screws | McMaster-Carr

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Unified Standard Class 3A

Specifications Met

ASME B18.3

ASTM F912

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28 Products

Tip Type

Cup

Thin edges dig into surfaces for a secure hold

20 products

Flat

Less likely than other tips to mar surfaces when you reposition parts frequently

2 products

Tip Type

Cone

A pointed tip gives you more grip than other set screws

6 products

Hollow

Thread over pins or other set screws to hold them in place

2 products

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.

Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.

	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







	7/16"-20

	3/8"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	25	000000000	000000


	7/16"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	25	000000000	00000
	1/2"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	25	000000000	00000
	5/8"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	25	000000000	00000
	3/4"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	10	000000000	00000
	7/8"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	10	000000000	0000
	1"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	10	000000000	00000
	1 1/4"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	10	000000000	0000
	1 1/2"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	5	000000000	00000
	1 3/4"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	5	000000000	0000
	2"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	5	000000000	00000


	2 1/2"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	5	000000000	00000
	3"	7/32"	Rockwell C45	ASME B18.3, ASTM F912	1	000000000	0000

Stainless Steel Cup-Tip Set Screws

These corrosion-resistant cup-tip screws grip parts tightly. Made of stainless steel, they won't rust, but they're not as strong as alloy steel. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.

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.

	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	7/16"-20

	3/8"	7/32"	Rockwell B80	ASME B18.3	10	000000000	00000


	1/2"	7/32"	Rockwell B80	ASME B18.3	10	000000000	0000
	5/8"	7/32"	Rockwell B80	ASME B18.3	10	000000000	0000
	3/4"	7/32"	Rockwell B80	ASME B18.3	10	000000000	0000
	1"	7/32"	Rockwell B80	ASME B18.3	10	000000000	00000
	1 1/4"	7/32"	Rockwell B80	ASME B18.3	5	000000000	0000
	1 1/2"	7/32"	Rockwell B80	ASME B18.3	5	000000000	0000

Steel Cone-Tip Set Screws

Permanently locate parts that you don't intend to move. The pointed tip bites down on surfaces but may scratch or gouge. Made of alloy steel, they're strong enough to hold components without wearing down.

Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.

	Hardness	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







	7/16"-20

	3/8"	118°	7/32"	Rockwell C45	ASME B18.3, ASTM F912	1	000000000	00000


	7/16"	118°	7/32"	Rockwell C45	ASME B18.3, ASTM F912	5	000000000	0000
	1/2"	90°	7/32"	Rockwell C45	ASME B18.3, ASTM F912	1	000000000	0000
	5/8"	90°	7/32"	Rockwell C45	ASME B18.3, ASTM F912	1	000000000	0000
	1"	90°	7/32"	Rockwell C45	ASME B18.3, ASTM F912	1	000000000	0000
	1 1/2"	90°	7/32"	Rockwell C45	ASME B18.3, ASTM F912	1	000000000	0000

Steel Hollow-Tip Set Screws

Screw Used to Adjust

Spring Tension

Image of Product. Front orientation. Set Screws. Steel Hollow-Tip Set Screws.

Thread these screws over a pin or another set screw to lock it in place, or over a spring to adjust tension. You can also peek through the hollow center to inspect locked parts. Made of alloy steel, these screws are strong enough to hold components without wearing down. Also known as jam set screws.

Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.

	Lg.	Drive Size	Hardness	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel



	7/16"-20	7/32"	7/32"	Rockwell C45	10	000000000	000000

Stainless Steel Hollow-Tip Set Screws

Screw Used to Adjust

Spring Tension

Image of Product. Front orientation. Set Screws. Stainless Steel Hollow-Tip Set Screws.

The most corrosion-resistant hollow-tip set screws we offer. Made of stainless steel, they won't rust, but they're not as strong as alloy steel. Thread these screws over a pin or another set screw to lock it in place, or over a spring to adjust tension. You can also peek through the hollow center to inspect locked parts. Also known as jam set screws.

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.

	Lg.	Drive Size	Hardness	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	7/16"-20	7/32"	7/32"	Rockwell B80	1	000000000	00000