Square Head Set Screws

Square head set screws give you a solid wrenching surface when an Allen key is not in the cards. These case-hardened, cup point screws bite into shafts and collars to stop slip and hold torque. Choose plain heads for standard installs or drilled heads for safety wire and lockout insurance. ASME B18.6.2.

52 results

Plain Square Head Set Screws - Coarse Thread (USS)

Drilled Square Head Cup Point Set Screws - Coarse Thread (USS)

Plain Square Head Set Screws - Coarse Thread (USS)

Plain square head set screws in case-hardened steel with a plain finish and coarse USS threads. Cup point tip and square head provide secure holding and easy wrenching, while case hardening improves shear resistance. Common for fastening and shaft‑seat applications.

Diameter: 1/4"

Length	Thread Size	Thread Type	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/2"	1/4"-20	Coarse	25	304931	Log in to view price
1/4"-20 x 1/2" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304931 Package Weight: 0.2 lbs View Product Details Log in to Order
3/4"	1/4"-20	Coarse	25	304932	Log in to view price
1/4"-20 x 3/4" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304932 Package Weight: 0.3 lbs View Product Details Log in to Order
1"	1/4"-20	Coarse	25	304933	Log in to view price
1/4"-20 x 1" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304933 Package Weight: 0.4 lbs View Product Details Log in to Order

Diameter: 5/16"

Length	Thread Size	Thread Type	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/2"	5/16"-18	Coarse	25	304936	Log in to view price
5/16"-18 x 1/2" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304936 Package Weight: 0.4 lbs View Product Details Log in to Order
3/4"	5/16"-18	Coarse	25	304937	Log in to view price
5/16"-18 x 3/4" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304937 Package Weight: 0.4 lbs View Product Details Log in to Order
1"	5/16"-18	Coarse	25	304938	Log in to view price
5/16"-18 x 1" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304938 Package Weight: 0.6 lbs View Product Details Log in to Order

Diameter: 3/8"

Length	Thread Size	Thread Type	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/2"	3/8"-16	Coarse	25	304943	Log in to view price
3/8"-16 x 1/2" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304943 Package Weight: 0.5 lbs View Product Details Log in to Order
5/8"	3/8"-16	Coarse	25	304942	Log in to view price
3/8"-16 x 5/8" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304942 Package Weight: 0.6 lbs View Product Details Log in to Order
3/4"	3/8"-16	Coarse	25	304944	Log in to view price
3/8"-16 x 3/4" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304944 Package Weight: 0.7 lbs View Product Details Log in to Order
1"	3/8"-16	Coarse	25	304945	Log in to view price
3/8"-16 x 1" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304945 Package Weight: 0.9 lbs View Product Details Log in to Order
1-1/4"	3/8"-16	Coarse	25	304946	Log in to view price
3/8"-16 x 1-1/4" (USS) Plain Square Head Set Screw - 25 Pack Item #: 304946 Package Weight: 1 lbs View Product Details Log in to Order
1-1/2"	3/8"-16	Coarse	25	304947	Log in to view price
3/8"-16 x 1-1/2" Square Head Set Screw - 25 Pack Item #: 304947 Package Weight: 1.2 lbs View Product Details Log in to Order

View All

Drilled Square Head Cup Point Set Screws - Coarse Thread (USS)

Drilled square head cup point set screws made from case‑hardened steel with plain finish and coarse USS threads. The drilled shank and square head provide secure wrenching and the cup point helps locate and resist loosening. Suitable for general fastening and shaft retention.

Diameter: 3/8"

Length	Thread Size	Thread Type	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
5/8"	3/8"-16	Coarse	10	304974	Log in to view price
3/8"-16 x 5/8" Drilled Square Head Cup Point Set Screw - 10 Pack Item #: 304974 Package Weight: 0.3 lbs View Product Details Log in to Order
3/4"	3/8"-16	Coarse	10	304975	Log in to view price
3/8"-16 x 3/4" Drilled Square Head Cup Point Set Screw - 10 Pack Item #: 304975 Package Weight: 0.3 lbs View Product Details Log in to Order