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FREE SHIPPING on non-Industrial Storage orders $50+
FREE SHIPPING on non-Industrial Storage orders $50+
2,525 Piece Grade 8 UNF Hex Head Cap Screw Assortment Refill

2,525 Piece Grade 8 UNF Hex Head Cap Screw Assortment Refill

SKU ASST40F8REFILL

The same 2,525-piece Grade 8 fine-thread assortment as the Starter Kit — without the bin. If you already own a 40-hole bin, this refill restocks 1/4"-28 through 1/2"-20 UNF bolts, nuts, and washers without paying for storage you already have.

What's Included
  • Grade 8 hex head cap screws — 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, and 1/2"-20, multiple lengths per size
  • Grade 8 hex nuts — matching every bolt size in the kit
  • USS flat washers and high-alloy lock washers — one set per diameter
  • 2,525 pieces total
  • Storage is not included — designed for customers who already own a 40-hole bin
Specifications
Thread standard UNF — Unified National Fine
Grade SAE J429 Grade 8
Tensile strength 150,000 PSI minimum
Finish Yellow zinc
Diameters 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20
Total pieces 2,525
Approx. weight ~55 lbs
Storage included No — for customers who already own a 40-hole bin
Compatible storage 40-hole metal bin (included with ASST40F8 Starter Kit)
Best For
  • Existing bin owners — if you already have a 40-hole metal bin from a previous kit purchase, this refill restocks it completely without the added cost of new storage
  • Fleet and vehicle maintenance shops — operations that cycle through fine-thread Grade 8 fasteners regularly and need a fast, reliable way to restock
  • Multi-station operations — shops with bins at multiple workstations that need to replenish fasteners, not storage

Don't have a bin yet? The 2,525-Piece Grade 8 UNF Starter Kit includes both the fasteners and the labeled 40-hole metal bin — everything you need to get set up from scratch.

Starter Kit vs. Refill — Which Do I Need?
Starter Kit This Refill
Fasteners (2,525 pcs) ✓ ✓
40-hole metal bin ✓ Included — Already own one
QR-coded labels ✓ Included ✓ Included

If this is your first purchase, the Starter Kit is the right choice. If you're restocking an existing 40-hole bin, this refill saves you money.

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
$683.95 / kit
1 - 2
0% off
$649.7525 / kit
3 - 5
5% off
$615.555 / kit
6 - 7
10% off
$581.3575 / kit
8 - 9
15% off
$547.16 / kit
10+
20% off
Description

The same 2,525-piece Grade 8 fine-thread assortment as the Starter Kit — without the bin. If you already own a 40-hole bin, this refill restocks 1/4"-28 through 1/2"-20 UNF bolts, nuts, and washers without paying for storage you already have.

What's Included
  • Grade 8 hex head cap screws — 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, and 1/2"-20, multiple lengths per size
  • Grade 8 hex nuts — matching every bolt size in the kit
  • USS flat washers and high-alloy lock washers — one set per diameter
  • 2,525 pieces total
  • Storage is not included — designed for customers who already own a 40-hole bin
Specifications
Thread standard UNF — Unified National Fine
Grade SAE J429 Grade 8
Tensile strength 150,000 PSI minimum
Finish Yellow zinc
Diameters 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20
Total pieces 2,525
Approx. weight ~55 lbs
Storage included No — for customers who already own a 40-hole bin
Compatible storage 40-hole metal bin (included with ASST40F8 Starter Kit)
Best For
  • Existing bin owners — if you already have a 40-hole metal bin from a previous kit purchase, this refill restocks it completely without the added cost of new storage
  • Fleet and vehicle maintenance shops — operations that cycle through fine-thread Grade 8 fasteners regularly and need a fast, reliable way to restock
  • Multi-station operations — shops with bins at multiple workstations that need to replenish fasteners, not storage

Don't have a bin yet? The 2,525-Piece Grade 8 UNF Starter Kit includes both the fasteners and the labeled 40-hole metal bin — everything you need to get set up from scratch.
Starter Kit vs. Refill — Which Do I Need?
Starter Kit This Refill
Fasteners (2,525 pcs) ✓ ✓
40-hole metal bin ✓ Included — Already own one
QR-coded labels ✓ Included ✓ Included

If this is your first purchase, the Starter Kit is the right choice. If you're restocking an existing 40-hole bin, this refill saves you money.
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