Stud Bolts, Hex Bolts & Heavy Hex Nuts — ASTM-Certified Flange Bolting
Warwick supplies stud bolts, heavy hex nuts, hex head bolts, socket head cap screws, and structural fasteners in carbon steel, alloy steel, stainless, and nickel alloy grades. ASTM A193/A194 certified with full traceability for pressure-containing applications.
Our fastener inventory covers all flange bolting requirements from standard B7/2H carbon steel stud bolt sets to B8M stainless and B16 alloy steel for high-temperature service. We supply complete flange bolt-up kits matched to gasket and flange specifications.
Structural fasteners including A325, A490, and F3125 high-strength bolts for structural connections are available with mill certifications. All pressure-containing fasteners are supplied with ASTM-certified test reports and heat traceability documentation.
Bolts & Fasteners — Specifications & Grades
All materials supplied to ASTM, ASME, API, and applicable international standards. Applicable MTRs and material documentation provided per specification and purchase-order requirements.
| PRODUCT | SIZE RANGE |
|---|---|
| Stud Bolts (Fully Threaded) | 1/4" – 4" diameter, up to 72" length |
| Heavy Hex Nuts | 1/4" – 4" diameter |
| Hex Head Bolts & Cap Screws | 1/4" – 2" diameter |
| Socket Head Cap Screws | #0-80 – 1-1/2"-6 UNC |
| Structural Bolts (A325 / A490) | 1/2" – 1-1/2" diameter |
| Stainless Stud Bolts | 1/4" – 2" diameter |
| Nickel Alloy Fasteners | 1/4" – 1-1/2" diameter |
| Washers (Flat & Lock) | 1/4" – 2" diameter |
* Contact sales for custom grades, non-standard sizes, or expedited sourcing. MTRs and certifications available on request.
Who We Supply
Documentation Provided Per Specification
Mill test reports are reviewed and verified before shipment — not assembled after the fact. Heat numbers, certifications, and compliance documentation are retained for 10+ years. We supply to ASTM, ASME, API, and applicable international standards.
Submit Your Bolts & Fasteners Requirements
Upload your BOM, MTO, or specification sheet. Our sourcing team responds the same business day with pricing and availability.