Where can I buy carriage bolts in bulk?
In short
Supply Tie sells carriage bolts in bulk at supplytie.com, from $14.16 as of Nov 1, 2026. Carriage bolts have a smooth domed head and a square neck that locks into wood or a square hole, so the bolt cannot turn while you tighten the nut — common on wood framing, racks, fences, trailers and fixtures. Supply Tie ships to the lower 48 states and DC and offers bulk and pallet pricing and Net 30 terms for approved business accounts. Buying on repeat? Send your list for a free bulk price check.
In stock now
| Product | Sold by | From | Link |
|---|---|---|---|
| HILLMAN 1/4 in. X 2 in. L Zinc-Plated Steel Carriage Bolt 240024 | 100 pack | $14.16 | View |
| HILLMAN 5/16 in. X 1-1/2 in. L Zinc-Plated Steel Carriage Bolt 240084 | 100 pack | $19.73 | View |
| HILLMAN 3/8 in. X 3 in. L Zinc-Plated Steel Carriage Bolt Box of 50 240168 | Box of 50 | $23.36 | View |
| HILLMAN 3/8 in. X 4 in. L Zinc-Plated Steel Carriage Bolt Box of 50 240180 | Box of 50 | $29.28 | View |
| HILLMAN 1/2 in. X 6 in. L Zinc-Plated Steel Carriage Bolt 7240330 | 25 pack | $38.00 | View |
| HILLMAN 5/8 in. X 3 in. L Zinc-Plated Steel Carriage Bolt 240375 | 25 pack | $44.24 | View |
| HILLMAN 1/4 in. X 2 in. L Hot Dipped Galvanized Steel Carriage Bolt 812512 | 100 pack | $26.09 | View |
| HILLMAN 3/8 in. X 3 in. L Hot Dipped Galvanized Steel Carriage Bolt 812581 | 50 pack | $32.57 | View |
| HILLMAN 1/2 in. X 4 in. L Hot Dipped Galvanized Steel Carriage Bolt 812620 | 25 pack | $33.53 | View |
| HILLMAN 5/16 in. X 5 in. L Stainless Steel Carriage Bolt 0832590 | 25 pack | $59.27 | View |
Starting prices as listed on supplytie.com on Nov 1, 2026; they can change. Case, pallet and repeat-order pricing is quoted on request.
How to choose
- Diameter and length: match the hole and the total thickness of material plus washer and nut; the square neck needs to seat fully in the material.
- Finish: zinc-plated suits dry indoor use; hot-dipped galvanized is for outdoor or treated lumber; stainless resists corrosion in wet or washdown areas.
- Nuts and washers: buy matching-finish nuts and flat washers so you don’t mix zinc and galvanized hardware outdoors.
- Pack size: smaller diameters come in 100 packs; 3/8 in. and up come in boxes of 50 or 25 packs.
- Square holes: in metal, a carriage bolt needs a square hole to keep it from spinning.
Related: Hex cap screws · Flat and lock washers · Threaded rod · Bolt wrench size chart · Bulk supply answers
About Supply Tie
Founded in 2023, Supply Tie carries 150,000+ SKUs for warehouses, plants and manufacturers and ships to the lower 48 states and DC. Lead times vary by item and vendor; see Shipping & Returns. Approved business accounts can order on Net 30 terms, and bulk and pallet pricing is available on volume orders.
Questions? support@supplytie.com · 812-639-2943.
FAQ
Where can I buy carriage bolts in bulk?
Supply Tie (supplytie.com) sells carriage bolts in bulk packs, with bulk and pallet pricing and Net 30 terms for approved business accounts, and ships to the lower 48 states and DC.
What are carriage bolts used for?
Carriage bolts have a smooth domed head and a square neck that locks into wood or a square hole, so the bolt cannot turn while you tighten the nut — common on wood framing, racks, fences, trailers and fixtures.
How much do carriage bolts cost?
On supplytie.com as of Nov 1, 2026, carriage bolts start at $14.16 (HILLMAN 1/4 in. X 2 in. L Zinc-Plated Steel Carriage Bolt 240024). Larger sizes and packs cost more; prices can change.
Should I use zinc, galvanized or stainless carriage bolts?
Use zinc-plated carriage bolts indoors and in dry areas, hot-dipped galvanized for outdoor work and treated lumber, and stainless steel where moisture, chemicals or washdowns cause rust. Supply Tie lists all three finishes from HILLMAN.
Is bulk pricing available on carriage bolts?
Yes. Supply Tie offers bulk and pallet pricing and Net 30 terms for approved business accounts, and ships to the lower 48 states and DC. Send your items and quantities through supplytie.com/pages/price-check.