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FREE SHIPPING on non-Industrial Storage orders $50+
FREE SHIPPING on non-Industrial Storage orders $50+
3,575 Piece Grade 8 UNC Hex Head Cap Screw Assortment Refill

3,575 Piece Grade 8 UNC Hex Head Cap Screw Assortment Refill

SKU ASST80C8/NLNC8REFILL

The same 3,575-piece Grade 8 coarse-thread assortment as the Starter Kit — without the bins. If you already own bin storage, this refill restocks 1/4" through 3/4" UNC hex head cap screws, hex nuts, nylon-insert lock nuts, flat washers, and lock washers without paying for storage you already have.

What's Included
  • Grade 8 hex head cap screws — 1/4"-20 through 3/4"-10 UNC, multiple lengths per diameter
  • Grade 8 hex nuts — matching every bolt size in the kit
  • Nylon-insert lock nuts (Grade C) — matching every bolt diameter, for vibration-resistant fastening
  • SAE flat washers and high-alloy lock washers — one set per diameter
  • 3,575 pieces total
  • Storage is not included — designed for customers who already own it.
Specifications
Thread standard UNC — Unified National Coarse
Grade SAE J429 Grade 8
Tensile strength 150,000 PSI minimum
Finish Yellow zinc
Diameters 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11, 3/4"-10
Lock nut type Nylon-insert (Grade C) — rated to 250°F continuous
Total pieces 3,575
Approx. weight ~90 lbs
Storage included No — for customers who already own bins
Compatible storage 2 40-hole metal bins (included with the 3,575-Piece Grade 8 UNC Starter Kit)
Best For
  • Existing bin owners — if you already have metal bin storage from a previous kit purchase, this refill restocks it completely without the added cost of new storage
  • Vibration-prone environments — nylon-insert lock nuts are ideal for equipment that sees regular vibration, such as trucks, trailers, compressors, and generators
  • High-volume shops — fleet facilities, construction crews, and heavy equipment maintenance teams that cycle through Grade 8 coarse-thread fasteners regularly
  • Multi-station operations — shops that already have bins set up across multiple workstations and simply need to replenish fasteners

Don't have a bin storage yet? The 3,575-Piece Grade 8 UNC Hex Head Cap Screw Starter Kit includes both the fasteners and the metal bins — everything you need to get organized from scratch.

Starter Kit vs. Refill — Which Do I Need?
Starter Kit This Refill
Fasteners (3,575 pcs) ✓ ✓
Nylon-insert lock nuts ✓ ✓
2 40-hole metal bins ✓ Included — Already own them
QR-coded labels ✓ Included — Included

If this is your first purchase, the Starter Kit is the right choice. If you're restocking existing bin storage, this refill gives you the full fastener load without paying for storage twice.

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 a quarterly restock cadence and custom pricing — contact us
Buy More, Save More
$1087.13 / kit
1 - 2
0% off
$1032.7735 / kit
3 - 5
5% off
$978.417 / kit
6 - 7
10% off
$924.0605 / kit
8 - 9
15% off
$869.704 / kit
10+
20% off
Description

The same 3,575-piece Grade 8 coarse-thread assortment as the Starter Kit — without the bins. If you already own bin storage, this refill restocks 1/4" through 3/4" UNC hex head cap screws, hex nuts, nylon-insert lock nuts, flat washers, and lock washers without paying for storage you already have.

What's Included
  • Grade 8 hex head cap screws — 1/4"-20 through 3/4"-10 UNC, multiple lengths per diameter
  • Grade 8 hex nuts — matching every bolt size in the kit
  • Nylon-insert lock nuts (Grade C) — matching every bolt diameter, for vibration-resistant fastening
  • SAE flat washers and high-alloy lock washers — one set per diameter
  • 3,575 pieces total
  • Storage is not included — designed for customers who already own it.
Specifications
Thread standard UNC — Unified National Coarse
Grade SAE J429 Grade 8
Tensile strength 150,000 PSI minimum
Finish Yellow zinc
Diameters 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11, 3/4"-10
Lock nut type Nylon-insert (Grade C) — rated to 250°F continuous
Total pieces 3,575
Approx. weight ~90 lbs
Storage included No — for customers who already own bins
Compatible storage 2 40-hole metal bins (included with the 3,575-Piece Grade 8 UNC Starter Kit)
Best For
  • Existing bin owners — if you already have metal bin storage from a previous kit purchase, this refill restocks it completely without the added cost of new storage
  • Vibration-prone environments — nylon-insert lock nuts are ideal for equipment that sees regular vibration, such as trucks, trailers, compressors, and generators
  • High-volume shops — fleet facilities, construction crews, and heavy equipment maintenance teams that cycle through Grade 8 coarse-thread fasteners regularly
  • Multi-station operations — shops that already have bins set up across multiple workstations and simply need to replenish fasteners

Don't have a bin storage yet? The 3,575-Piece Grade 8 UNC Hex Head Cap Screw Starter Kit includes both the fasteners and the metal bins — everything you need to get organized from scratch.
Starter Kit vs. Refill — Which Do I Need?
Starter Kit This Refill
Fasteners (3,575 pcs) ✓ ✓
Nylon-insert lock nuts ✓ ✓
2 40-hole metal bins ✓ Included — Already own them
QR-coded labels ✓ Included — Included

If this is your first purchase, the Starter Kit is the right choice. If you're restocking existing bin storage, this refill gives you the full fastener load without paying for storage twice.
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 a quarterly restock cadence and custom pricing — contact us