Grade 8 Hex Head Cap Screws
KM-USA High Head Grade 8 Cap Screws - USS
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
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|---|---|---|---|---|---|---|
| 1/2" | 1/4"-20 | Coarse | KM-USA High Head | 25 |
380404J
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Item Number: 380404J
Package Weight: 0.3 lbs
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||||||
| 1/2" | 1/4"-20 | Coarse | KM-USA High Head | 100 |
380404
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Item Number: 380404
Package Weight: 1.3 lbs
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| 3/4" | 1/4"-20 | Coarse | KM-USA High Head | 25 |
380406J
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Item Number: 380406J
Package Weight: 0.4 lbs
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||||||
| 3/4" | 1/4"-20 | Coarse | KM-USA High Head | 100 |
380406
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Item Number: 380406
Package Weight: 1.6 lbs
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| 1" | 1/4"-20 | Coarse | KM-USA High Head | 25 |
380408J
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Item Number: 380408J
Package Weight: 0.5 lbs
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| 1" | 1/4"-20 | Coarse | KM-USA High Head | 100 |
380408
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Item Number: 380408
Package Weight: 1.9 lbs
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| 1-1/4" | 1/4"-20 | Coarse | KM-USA High Head | 25 |
380410J
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Item Number: 380410J
Package Weight: 0.6 lbs
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| 1-1/4" | 1/4"-20 | Coarse | KM-USA High Head | 100 |
380410
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Item Number: 380410
Package Weight: 2.2 lbs
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| 1-1/2" | 1/4"-20 | Coarse | KM-USA High Head | 25 |
380412J
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Item Number: 380412J
Package Weight: 0.7 lbs
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| 1-1/2" | 1/4"-20 | Coarse | KM-USA High Head | 100 |
380412
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Item Number: 380412
Package Weight: 2.6 lbs
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| 1-3/4" | 1/4"-20 | Coarse | KM-USA High Head | 25 |
380414J
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Item Number: 380414J
Package Weight: 0.7 lbs
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||||||
| 1-3/4" | 1/4"-20 | Coarse | KM-USA High Head | 100 |
380414
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Item Number: 380414
Package Weight: 2.9 lbs
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KM-USA Grade 8 (USS) High Head Hex Head Cap Screws Assortments
Storage Type: 24-Compartment Drawer
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 3/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 750 | 1 |
40388
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Item Number: 40388
Package Weight: 24.6 lbs
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Storage Type: 40-Hole Bin
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 1/2") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 1,735 | 1 |
40380
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Item Number: 40380
Package Weight: 102.4 lbs
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|||||||
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 3/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 1,200 | 1 |
403801
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Item Number: 403801
Package Weight: 58.7 lbs
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| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (3/4" - 1") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 230 | 1 |
403811
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Item Number: 403811
Package Weight: 117.3 lbs
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Storage Type: 80-Hole Bin
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| KM-USA High Head Grade 8 Hex Head (USS & SAE) Cap Screw Assortment (1/4" - 5/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE, USS | 3,000 | 1 |
40383
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Item Number: 40383
Package Weight: 185.5 lbs
|
|||||||
| KM-USA High Head Hex Head Grade 8 (USS) Cap Screw Assortment (1/4" - 3/4") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 3,775 | 1 |
40385
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Item Number: 40385
Package Weight: 299.8 lbs
|
|||||||
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 3/4") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 1,910 | 1 |
40386
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Item Number: 40386
Package Weight: 190.3 lbs
|
|||||||
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 5/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 2,720 | 1 |
40381
|
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Item Number: 40381
Package Weight: 180.8 lbs
|
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Storage Type: Refill Kit
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| Refill Kit for KM-USA High Head Grade 8 Hex Head (USS & SAE) Cap Screw Assortment (1/4" - 5/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE, USS | 3,000 | 1 |
40383RE
|
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Item Number: 40383RE
Package Weight: 107.3 lbs
|
|||||||
| Refill Kit for KM-USA High Head Grade 8 Hex Head (USS) Cap Screw Large Assortment (1/4" - 3/4") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 3,775 | 1 |
40385RE
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Item Number: 40385RE
Package Weight: 221.6 lbs
|
|||||||
| Refill Kit for KM-USA High Head Grade 8 Hex Head Cap Screw Large Assortment (1/4" - 5/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 2,720 | 1 |
40381RE
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Item Number: 40381RE
Package Weight: 102.6 lbs
|
|||||||
| Refill Kit for KM-USA High Head Grade 8 Hex Head Cap Screw Small Assortment (1/4" - 1/2") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | USS | 1,735 | 1 |
40380RE
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Item Number: 40380RE
Package Weight: 63.3 lbs
|
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KM-USA High Head Grade 8 Cap Screws - SAE
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
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|---|---|---|---|---|---|---|
| 1/2" | 1/4"-28 | Fine | KM-USA High Head | 25 |
390404J
|
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Item Number: 390404J
Package Weight: 0.3 lbs
|
||||||
| 1/2" | 1/4"-28 | Fine | KM-USA High Head | 100 |
390404
|
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Item Number: 390404
Package Weight: 1.4 lbs
|
||||||
| 3/4" | 1/4"-28 | Fine | KM-USA High Head | 25 |
390406J
|
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Item Number: 390406J
Package Weight: 0.4 lbs
|
||||||
| 3/4" | 1/4"-28 | Fine | KM-USA High Head | 100 |
390406
|
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Item Number: 390406
Package Weight: 1.6 lbs
|
||||||
| 1" | 1/4"-28 | Fine | KM-USA High Head | 25 |
390408J
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Item Number: 390408J
Package Weight: 0.5 lbs
|
||||||
| 1" | 1/4"-28 | Fine | KM-USA High Head | 100 |
390408
|
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Item Number: 390408
Package Weight: 2 lbs
|
||||||
| 1-1/4" | 1/4"-28 | Fine | KM-USA High Head | 25 |
390410J
|
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Item Number: 390410J
Package Weight: 0.6 lbs
|
||||||
| 1-1/4" | 1/4"-28 | Fine | KM-USA High Head | 100 |
390410
|
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Item Number: 390410
Package Weight: 2.3 lbs
|
||||||
| 1-1/2" | 1/4"-28 | Fine | KM-USA High Head | 25 |
390412J
|
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Item Number: 390412J
Package Weight: 0.7 lbs
|
||||||
| 1-1/2" | 1/4"-28 | Fine | KM-USA High Head | 100 |
390412
|
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Item Number: 390412
Package Weight: 2.6 lbs
|
||||||
| 1-3/4" | 1/4"-28 | Fine | KM-USA High Head | 25 |
390414J
|
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Item Number: 390414J
Package Weight: 0.8 lbs
|
||||||
| 1-3/4" | 1/4"-28 | Fine | KM-USA High Head | 100 |
390414
|
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Item Number: 390414
Package Weight: 3 lbs
|
||||||
KM-USA Grade 8 (SAE) Hex Head Cap Screws Assortments
Storage Type: 24-Compartment Drawer
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 3/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 620 | 1 |
40398
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Item Number: 40398
Package Weight: 23.6 lbs
|
|||||||
Storage Type: 40-Hole Bin
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 1/2") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 1,735 | 1 |
40390
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Item Number: 40390
Package Weight: 98.6 lbs
|
|||||||
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (3/4" - 1") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 230 | 1 |
403911
|
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Item Number: 403911
Package Weight: 119.2 lbs
|
|||||||
Storage Type: 80-Hole Bin
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| KM-USA High Head Hex Head Grade 8 (SAE) Cap Screw Assortment (1/4" - 3/4") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 3,375 | 1 |
40395
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Item Number: 40395
Package Weight: 289.7 lbs
|
|||||||
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 3/4") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 1,910 | 1 |
40396
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Item Number: 40396
Package Weight: 185.3 lbs
|
|||||||
| KM-USA High Head Hex Head Grade 8 Cap Screw Assortment (1/4" - 5/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 2,720 | 1 |
40391
|
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Item Number: 40391
Package Weight: 174.4 lbs
|
|||||||
Storage Type: Refill Kit
| Name | Material | Finish | Measurement Type | Number of Pieces | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|
| Refill Kit for KM-USA High Head Grade 8 Hex Head Cap Screw Small Assortment (1/4" - 3/4") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 1,910 | 1 |
40396RE
|
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Item Number: 40396RE
Package Weight: 107.1 lbs
|
|||||||
| Refill Kit for KM-USA High Head Hex Grade 8 Head Cap Screw Small Assortment (1/4" - 5/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 2,720 | 1 |
40391RE
|
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Item Number: 40391RE
Package Weight: 96.2 lbs
|
|||||||
| Refill Kit for KM-USA High Head Hex Head Cap Screw Assortment (1/4" - 1/2") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 1,735 | 1 |
40390RE
|
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Item Number: 40390RE
Package Weight: 59.5 lbs
|
|||||||
| Refill Kit for KM-USA High Head Hex Head Grade 8 Cap Screw Large Assortment (3/4" - 1") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 230 | 1 |
403911RE
|
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Item Number: 403911RE
Package Weight: 80.1 lbs
|
|||||||
| Refill Kit for Large KM-USA High Head Hex Head Cap Screw Assortment (1/4" - 5/8") | Medium Carbon Alloy Steel | Zinc, Yellow Trivalent | SAE | 3,375 | 1 |
40395RE
|
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Item Number: 40395RE
Package Weight: 211.5 lbs
|
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