2,625 Piece Grade 8 UNC Hex Head Cap Screw Assortment Starter Kit
2,625 Grade 8 UNC hex head cap screws with thick USS flat washers, hex nuts, lock washers, and flat washers — 40 holes, 1/4" through 1/2", in a large metal bin with QR-coded labels. The thick USS flat washer specification sets this kit apart from standard Grade 8 assortments: heavy-gauge USS washers distribute clamping load over a larger area, making this the right kit for structural fastening on construction equipment, agricultural machinery, and heavy fabrication where thin washers would embed or deform under load.
What's Included
- Grade 8 UNC hex head cap screws — 1/4", 5/16", 3/8", 1/2" in multiple lengths per diameter
- Thick USS flat washers — one set per bolt diameter
- Grade 8 hex nuts — matching each bolt diameter
- Lock washers — matching each bolt diameter
- Large metal bin — 40 holes, pre-sorted
- QR-coded product labels — making reordering easy
- 2,625 pieces total
Specifications
| Grade | Grade 8 (SAE J429) — 150,000 PSI tensile strength |
| Thread standard | UNC (Unified National Coarse) |
| Diameter range | 1/4" through 1/2" |
| Washer type | Thick USS flat washers (heavy-gauge) |
| Finish | Yellow zinc (Grade 8 standard) |
| Total pieces | 2,625 |
| Storage included | Yes — 40-hole large metal bin |
Best For
- Heavy construction and equipment shops — thick USS washers are specified where standard SAE washers would pull through or embed in structural steel, castings, or softer base materials under Grade 8 torque loads
- Agricultural equipment dealers and repair shops — farm equipment relies heavily on Grade 8 fasteners with USS washers for structural and implement attachment; this kit covers the most-used sizes in one bin
- Heavy fabrication and welding shops — fabricators building trailers, hoppers, lift tables, and structural assemblies need Grade 8 with thick washers as a standard stock item
- Fleet maintenance with heavy-duty vehicles — commercial trucks, semi-trailers, and heavy equipment use Grade 8 fasteners with USS washers on suspension, frame, and body attachment points
Thick USS vs. Standard USS Flat Washers
Both flat washers are used with Grade 8 bolts, but they serve different applications:
- USS flat washers — same OD with a thinner gauge. Suited for close-tolerance applications where the washer must fit within a counterbore. Standard with most Grade 8 assortments.
- USS extra-thick flat washers (thick) — same OD with a heavier gauge. The larger footprint distributes clamping force over more surface area, reducing the risk of the washer embedding in soft or irregular surfaces under high torque. Required in structural applications and anywhere the joint material is softer than the fastener (wood, composite, castings).
If your work regularly involves structural steel, agricultural equipment, or heavy fabrication, the thick USS washers in this kit are the correct specification. Questions? Contact us.
Shipping & Ordering
- Ships within 1–2 business days from our warehouse
- Volume pricing available — save up to 20% when ordering 3 or more
- Reorder regularly? Ask us about a B2B account with custom pricing — contact us
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2,625 Piece Grade 8 UNC Hex Head Cap Screw Assortment Starter Kit
2,625 Grade 8 UNC hex head cap screws with thick USS flat washers, hex nuts, lock washers, and flat washers — 40 holes, 1/4" through 1/2", in a large metal bin with QR-coded labels. The thick USS flat washer specification sets this kit apart from standard Grade 8 assortments: heavy-gauge USS washers distribute clamping load over a larger area, making this the right kit for structural fastening on construction equipment, agricultural machinery, and heavy fabrication where thin washers would embed or deform under load.
What's Included
- Grade 8 UNC hex head cap screws — 1/4", 5/16", 3/8", 1/2" in multiple lengths per diameter
- Thick USS flat washers — one set per bolt diameter
- Grade 8 hex nuts — matching each bolt diameter
- Lock washers — matching each bolt diameter
- Large metal bin — 40 holes, pre-sorted
- QR-coded product labels — making reordering easy
- 2,625 pieces total
Specifications
| Grade | Grade 8 (SAE J429) — 150,000 PSI tensile strength |
| Thread standard | UNC (Unified National Coarse) |
| Diameter range | 1/4" through 1/2" |
| Washer type | Thick USS flat washers (heavy-gauge) |
| Finish | Yellow zinc (Grade 8 standard) |
| Total pieces | 2,625 |
| Storage included | Yes — 40-hole large metal bin |
Best For
- Heavy construction and equipment shops — thick USS washers are specified where standard SAE washers would pull through or embed in structural steel, castings, or softer base materials under Grade 8 torque loads
- Agricultural equipment dealers and repair shops — farm equipment relies heavily on Grade 8 fasteners with USS washers for structural and implement attachment; this kit covers the most-used sizes in one bin
- Heavy fabrication and welding shops — fabricators building trailers, hoppers, lift tables, and structural assemblies need Grade 8 with thick washers as a standard stock item
- Fleet maintenance with heavy-duty vehicles — commercial trucks, semi-trailers, and heavy equipment use Grade 8 fasteners with USS washers on suspension, frame, and body attachment points
Thick USS vs. Standard USS Flat Washers
Both flat washers are used with Grade 8 bolts, but they serve different applications:
- USS flat washers — same OD with a thinner gauge. Suited for close-tolerance applications where the washer must fit within a counterbore. Standard with most Grade 8 assortments.
- USS extra-thick flat washers (thick) — same OD with a heavier gauge. The larger footprint distributes clamping force over more surface area, reducing the risk of the washer embedding in soft or irregular surfaces under high torque. Required in structural applications and anywhere the joint material is softer than the fastener (wood, composite, castings).
If your work regularly involves structural steel, agricultural equipment, or heavy fabrication, the thick USS washers in this kit are the correct specification. Questions? Contact us.
Shipping & Ordering
- Ships within 1–2 business days from our warehouse
- Volume pricing available — save up to 20% when ordering 3 or more
- Reorder regularly? Ask us about a B2B account with custom pricing — contact us
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
2,625 Grade 8 UNC hex head cap screws with thick USS flat washers, hex nuts, lock washers, and flat washers — 40 holes, 1/4" through 1/2", in a large metal bin with QR-coded labels. The thick USS flat washer specification sets this kit apart from standard Grade 8 assortments: heavy-gauge USS washers distribute clamping load over a larger area, making this the right kit for structural fastening on construction equipment, agricultural machinery, and heavy fabrication where thin washers would embed or deform under load.
What's Included
- Grade 8 UNC hex head cap screws — 1/4", 5/16", 3/8", 1/2" in multiple lengths per diameter
- Thick USS flat washers — one set per bolt diameter
- Grade 8 hex nuts — matching each bolt diameter
- Lock washers — matching each bolt diameter
- Large metal bin — 40 holes, pre-sorted
- QR-coded product labels — making reordering easy
- 2,625 pieces total
Specifications
| Grade | Grade 8 (SAE J429) — 150,000 PSI tensile strength |
| Thread standard | UNC (Unified National Coarse) |
| Diameter range | 1/4" through 1/2" |
| Washer type | Thick USS flat washers (heavy-gauge) |
| Finish | Yellow zinc (Grade 8 standard) |
| Total pieces | 2,625 |
| Storage included | Yes — 40-hole large metal bin |
Best For
- Heavy construction and equipment shops — thick USS washers are specified where standard SAE washers would pull through or embed in structural steel, castings, or softer base materials under Grade 8 torque loads
- Agricultural equipment dealers and repair shops — farm equipment relies heavily on Grade 8 fasteners with USS washers for structural and implement attachment; this kit covers the most-used sizes in one bin
- Heavy fabrication and welding shops — fabricators building trailers, hoppers, lift tables, and structural assemblies need Grade 8 with thick washers as a standard stock item
- Fleet maintenance with heavy-duty vehicles — commercial trucks, semi-trailers, and heavy equipment use Grade 8 fasteners with USS washers on suspension, frame, and body attachment points
Thick USS vs. Standard USS Flat Washers
Both flat washers are used with Grade 8 bolts, but they serve different applications:
- USS flat washers — same OD with a thinner gauge. Suited for close-tolerance applications where the washer must fit within a counterbore. Standard with most Grade 8 assortments.
- USS extra-thick flat washers (thick) — same OD with a heavier gauge. The larger footprint distributes clamping force over more surface area, reducing the risk of the washer embedding in soft or irregular surfaces under high torque. Required in structural applications and anywhere the joint material is softer than the fastener (wood, composite, castings).
If your work regularly involves structural steel, agricultural equipment, or heavy fabrication, the thick USS washers in this kit are the correct specification. Questions? Contact us.
Shipping & Ordering
- Ships within 1–2 business days from our warehouse
- Volume pricing available — save up to 20% when ordering 3 or more
- Reorder regularly? Ask us about a B2B account with custom pricing — contact us
