Carriage Bolts — 3/8-16 x 3" · Zinc Plated · Box of 25
Round-head, square-neck bolts for wood and timber framing.
● In stock — typically ships within 1–2 business days
| Order qty (packs) | Per pack | Per piece | Save |
|---|---|---|---|
| 1–4 packs | $7.99 | $0.32 | — |
| 5–19 packs | $7.35 | $0.29 | −8% |
| 20+ packs | $6.79 | $0.27 | −15% |
Cost-effective indoor / dry corrosion protection (ASTM B633).
Active tier: 1–4 packs
SKU: IH-CARRIA-0375-3-ZN-B25 · MPN: IRX-CB0375-3ZNB25
Pack: 25 pieces · Ship weight: 2 lb · Brand: IronHex Fastener Co
Shipping is calculated by order amount and destination at checkout. USA-focused shipping with international options available. See shipping tiers →
Questions? Call +1 702-509-4651 or email sales@ironhexfastener.com
Need bulk pricing beyond tier 3?
Contractor or OEM volumes? Submit a BOM and we'll respond with line-item pricing within 4 business hours.
Request Bulk QuoteProduct description
Carriage Bolts — Round-head, square-neck bolts for wood and timber framing. Manufactured to ASME B18.5 round head, square neck. Each unit is supplied as a factory-sealed package containing the exact piece count shown; no break-units, no estimated counts.
Finish — Zinc Plated. Cost-effective indoor / dry corrosion protection (ASTM B633). Use the finish that matches your environment: zinc for dry indoor work, hot-dip galvanized for outdoor and treated-lumber exposure, 18-8 stainless for general corrosion resistance, and 316 stainless for marine, coastal, and chemical service.
This variant. Size 3/8-16 x 3" · Box of 25 (25 pieces) · 2 lb ship weight · SKU IH-CARRIA-0375-3-ZN-B25 · MPN IRX-CB0375-3ZNB25. Price shown is per package and updates automatically as your order quantity crosses each tier break.
Typical applications. Steel-to-steel structural connections, equipment mounting, machinery anchoring, and general construction.
How to order. Select finish, exact size, and pack on this page. Quantity is in packs — per-piece cost is shown for reference. Public checkout accepts PayPal or Wire Transfer. Need volumes beyond tier 3 or a mixed BOM? Use Request Bulk Quote.