Grade 8 Hex Head Cap Screws

When the joint can’t slip, stretch or back off, go Grade 8. Kimball Midwest stocks SAE and USS hex head cap screws and fully threaded tap bolts up to 150,000 psi for engines, pumps, ag and heavy equipment. Choose plain for dry installs, zinc for everyday corrosion or Armor Coat for harsh washdowns. High head options bite harder.

1500 results

KM-USA High Head Grade 8 (USS) Hex Head Cap Screws - Zinc Plated

KM-USA High Head Grade 8 (SAE) Hex Head Cap Screws - Zinc Plated

KM-USA High Head Grade 8 (USS) Hex Head Cap Screws - Zinc Plated

With a taller head for improved wrench grip, these KM‑USA High Head Grade 8 screws offer enhanced alignment in tough MRO applications. Special alloy steel delivers 150,000 PSI tensile strength, while zinc yellow plating resists corrosion. Perfect for machinery needing extra torque, they’re made in the USA for assured quality. Combine with Grade 8 washers and nuts for maximum reliability.

Diameter: 1/4"

Length	Thread Size	Thread Type	Series	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	KM-USA High Head	25	380404J	Log in to view price
1/4"-20 x 1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack Item #: 380404J Package Weight: 0.3 lbs View Product Details Log in to Order
1/2"	1/4"-20	Coarse	KM-USA High Head	100	380404	Log in to view price
1/4"-20 x 1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack Item #: 380404 Package Weight: 1.3 lbs View Product Details Log in to Order
3/4"	1/4"-20	Coarse	KM-USA High Head	25	380406J	Log in to view price
1/4"-20 x 3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack Item #: 380406J Package Weight: 0.4 lbs View Product Details Log in to Order
3/4"	1/4"-20	Coarse	KM-USA High Head	100	380406	Log in to view price
1/4"-20 x 3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack Item #: 380406 Package Weight: 1.6 lbs View Product Details Log in to Order
1"	1/4"-20	Coarse	KM-USA High Head	25	380408J	Log in to view price
1/4"-20 x 1" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack Item #: 380408J Package Weight: 0.5 lbs View Product Details Log in to Order
1"	1/4"-20	Coarse	KM-USA High Head	100	380408	Log in to view price
1/4"-20 x 1" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack Item #: 380408 Package Weight: 1.9 lbs View Product Details Log in to Order
1-1/4"	1/4"-20	Coarse	KM-USA High Head	25	380410J	Log in to view price
1/4"-20 x 1-1/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack Item #: 380410J Package Weight: 0.6 lbs View Product Details Log in to Order
1-1/4"	1/4"-20	Coarse	KM-USA High Head	100	380410	Log in to view price
1/4"-20 x 1-1/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack Item #: 380410 Package Weight: 2.2 lbs View Product Details Log in to Order
1-1/2"	1/4"-20	Coarse	KM-USA High Head	25	380412J	Log in to view price
1/4"-20 x 1-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack Item #: 380412J Package Weight: 0.7 lbs View Product Details Log in to Order
1-1/2"	1/4"-20	Coarse	KM-USA High Head	100	380412	Log in to view price
1/4"-20 x 1-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack Item #: 380412 Package Weight: 2.6 lbs View Product Details Log in to Order
1-3/4"	1/4"-20	Coarse	KM-USA High Head	25	380414J	Log in to view price
1/4"-20 x 1-3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack Item #: 380414J Package Weight: 0.7 lbs View Product Details Log in to Order
1-3/4"	1/4"-20	Coarse	KM-USA High Head	100	380414	Log in to view price
1/4"-20 x 1-3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack Item #: 380414 Package Weight: 2.9 lbs View Product Details Log in to Order

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KM-USA High Head Grade 8 (SAE) Hex Head Cap Screws - Zinc Plated

Boasting a 20% taller head for improved tool contact, these KM‑USA High Head Grade 8 Cap Screws (SAE) resist fatigue with a 150,000 PSI rating. The chrome alloy steel design supports easy alignment, while a zinc yellow finish guards against corrosion. Ideal for engine blocks, pumps, or structural assemblies, they’re 100% made in the USA. Use matching washers and nuts for reliable, long‑lasting performance.

Diameter: 1/4"

Length	Thread Size	Thread Type	Series	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"-28	Fine	KM-USA High Head	25	390404J	Log in to view price
1/4"-28 x 1/2" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 25 Pack Item #: 390404J Package Weight: 0.3 lbs View Product Details Log in to Order
1/2"	1/4"-28	Fine	KM-USA High Head	100	390404	Log in to view price
1/4"-28 x 1/2" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 100 Pack Item #: 390404 Package Weight: 1.4 lbs View Product Details Log in to Order
3/4"	1/4"-28	Fine	KM-USA High Head	25	390406J	Log in to view price
1/4"-28 x 3/4" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 25 Pack Item #: 390406J Package Weight: 0.4 lbs View Product Details Log in to Order
3/4"	1/4"-28	Fine	KM-USA High Head	100	390406	Log in to view price
1/4"-28 x 3/4" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 100 Pack Item #: 390406 Package Weight: 1.6 lbs View Product Details Log in to Order
1"	1/4"-28	Fine	KM-USA High Head	25	390408J	Log in to view price
1/4"-28 x 1" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 25 Pack Item #: 390408J Package Weight: 0.5 lbs View Product Details Log in to Order
1"	1/4"-28	Fine	KM-USA High Head	100	390408	Log in to view price
1/4"-28 x 1" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 100 Pack Item #: 390408 Package Weight: 2 lbs View Product Details Log in to Order
1-1/4"	1/4"-28	Fine	KM-USA High Head	25	390410J	Log in to view price
1/4"-28 x 1-1/4" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 25 Pack Item #: 390410J Package Weight: 0.6 lbs View Product Details Log in to Order
1-1/4"	1/4"-28	Fine	KM-USA High Head	100	390410	Log in to view price
1/4"-28 x 1-1/4" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 100 Pack Item #: 390410 Package Weight: 2.3 lbs View Product Details Log in to Order
1-1/2"	1/4"-28	Fine	KM-USA High Head	25	390412J	Log in to view price
1/4"-28 x 1-1/2" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 25 Pack Item #: 390412J Package Weight: 0.7 lbs View Product Details Log in to Order
1-1/2"	1/4"-28	Fine	KM-USA High Head	100	390412	Log in to view price
1/4"-28 x 1-1/2" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 100 Pack Item #: 390412 Package Weight: 2.6 lbs View Product Details Log in to Order
1-3/4"	1/4"-28	Fine	KM-USA High Head	25	390414J	Log in to view price
1/4"-28 x 1-3/4" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 25 Pack Item #: 390414J Package Weight: 0.8 lbs View Product Details Log in to Order
1-3/4"	1/4"-28	Fine	KM-USA High Head	100	390414	Log in to view price
1/4"-28 x 1-3/4" KM-USA High Head Grade 8 (SAE) Hex Head Cap Screw - 100 Pack Item #: 390414 Package Weight: 3 lbs View Product Details Log in to Order

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1/4"-20 x 1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380404

Price

Pkg Qty: 100

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1/4"-20 x 1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380404J

Price

Pkg Qty: 25

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1/4"-20 x 3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380406

Price

Pkg Qty: 100

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1/4"-20 x 3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380406J

Price

Pkg Qty: 25

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1/4"-20 x 1" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380408

Price

Pkg Qty: 100

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1/4"-20 x 1" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380408J

Price

Pkg Qty: 25

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1/4"-20 x 1-1/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380410

Price

Pkg Qty: 100

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1/4"-20 x 1-1/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380410J

Price

Pkg Qty: 25

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1/4"-20 x 1-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380412

Price

Pkg Qty: 100

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1/4"-20 x 1-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380412J

Price

Pkg Qty: 25

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1/4"-20 x 1-3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380414

Price

Pkg Qty: 100

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1/4"-20 x 1-3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380414J

Price

Pkg Qty: 25

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1/4"-20 x 2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380416

Price

Pkg Qty: 100

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1/4"-20 x 2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380416J

Price

Pkg Qty: 25

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1/4"-20 x 2-1/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 50 Pack

Item #: 380418

Price

Pkg Qty: 50

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1/4"-20 x 2-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 50 Pack

Item #: 380420

Price

Pkg Qty: 50

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1/4"-20 x 2-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380420J

Price

Pkg Qty: 25

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1/4"-20 x 2-3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 50 Pack

Item #: 380422

Price

Pkg Qty: 50

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1/4"-20 x 3" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 50 Pack

Item #: 380424

Price

Pkg Qty: 50

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1/4"-20 x 3" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380424J

Price

Pkg Qty: 25

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1/4"-20 x 3-1/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380426

Price

Pkg Qty: 25

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1/4"-20 x 3-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380428

Price

Pkg Qty: 25

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1/4"-20 x 3-3/4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380430

Price

Pkg Qty: 25

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1/4"-20 x 4" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380432

Price

Pkg Qty: 25

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1/4"-20 x 4-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380436

Price

Pkg Qty: 25

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1/4"-20 x 5" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380440

Price

Pkg Qty: 25

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1/4"-20 x 5-1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380444

Price

Pkg Qty: 25

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1/4"-20 x 6" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 25 Pack

Item #: 380448

Price

Pkg Qty: 25

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5/16"-18 x 1/2" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380504

Price

Pkg Qty: 100

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5/16"-18 x 5/8" KM-USA High Head Grade 8 (USS) Hex Head Cap Screw - 100 Pack

Item #: 380505

Price

Pkg Qty: 100

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Steeped in Kimball Midwest's commitment to American-made quality, our Grade 8 Hex Head cap screws are known for their superior strength and durability. They're ideal for heavy-duty applications where superior tensile strength is necessary.

Superior Strength and Durability

Our Grade 8 cap screws are crafted from high-strength carbon alloy steel and are designed for demanding applications and to deliver an extra margin of job safety. Their impressive strength makes them suitable for various industrial, machinery and automotive applications.

Cap Screws For Versatile Applications

Our hex head cap screws come in various sizes and lengths, making them versatile for different uses. Whether you need fasteners for machinery, construction or maintenance tasks, our Grade 8 screws offer the reliability you need to get the job done right. Choose from a variety of screw series including Armor Coat™, KM-USA High Head, Standard and Tap Bolt.

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Grade 8 Hex Head Cap Screws

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1500 results

Superior Strength and Durability

Cap Screws For Versatile Applications