Fully-threaded stud bolts to ASTM A193 Grade B7 (chromium-molybdenum alloy) with two ASTM A194 Grade 2H heavy hex nuts - the standard for flange bolting on pipelines, refineries, pressure vessels and power plant. Sizes are metric with an inch equivalent (switch units below); length is cut to your flange rating (ASME B16.5).
- ✓ Nationwide delivery
- ✓ MTR / test cert on request
- ✓ Quote within 1 business day
- ✓ Bulk & trade pricing
Stud Bolt (B7)
ASTM A193 B7 flange stud bolts with A194 2H nuts - metric or inch.
ASTM A193 B7 stud + A194 2H nut
Configure & add to quote
Price on requestPick your exact spec — we reply with a price, usually within one business day.
Self-colour B7 stud, lightly oiled. The standard for indoor / insulated flanges.
Cut to your flange rating and gasket (ASME B16.5). Give a stud length, or the flange NPS + class / rating and we size it.
No minimum order — buy by piece, box or bulk. Volume pricing on request.
Your selection: —
Added items go to your quote list — send everything as one request.
Supplied as an assembly
- • 1 x B7 threaded stud
- • 2 x A194 Grade 2H heavy hex nuts
- • Hardened washers on request
Recommended matching nut
ASTM A194 Grade 2H heavy hex nut (2 per stud). Why it matters →
Specification
| Type | Stud Bolt (B7) |
|---|---|
| Product standard | ASTM A193 B7 stud + A194 2H nut |
| Strength standard | ASTM A193 / A194 |
| Grades / classes | B7 |
| Size range | M6 – M36 |
| Head | None (double-end / continuous thread) |
| Drive | Two heavy hex nuts |
| Threading | Full thread |
Finishes explained
| Plain / Self-Colour (B7 black) | Self-colour B7 stud, lightly oiled. The standard for indoor / insulated flanges. |
|---|---|
| Hot-Dip Galvanized (HDG) | Hot-dip galvanized for outdoor / atmospheric flange service. (ASTM A153) |
| PTFE / Xylan Coated | Fluoropolymer (Xylan / PTFE) coat - corrosion + anti-galling, low friction for controlled torque. Common blue/grey. (Xylan 1070) |
| Zinc Plated (BZP) | Zinc-plated for lighter / indoor duty. (ISO 4042) |
Grades available depend on the finish — the configurator updates automatically.
Stud Bolt (B7) size chart
| Size | Imperial (≈) | Coarse pitch (mm) | Stress area (mm²) |
|---|---|---|---|
| M6 | 1/4" | 1 | 20.1 |
| M8 | 5/16" | 1.25 | 36.6 |
| M10 | 3/8" | 1.5 | 58 |
| M12 | 1/2" | 1.75 | 84.3 |
| M14 | 9/16" | 2 | 115 |
| M16 | 5/8" | 2 | 157 |
| M18 | 11/16" | 2.5 | 192 |
| M20 | 3/4" | 2.5 | 245 |
| M22 | 7/8" | 2.5 | 303 |
| M24 | 1" | 3 | 353 |
| M27 | 1-1/16" | 3 | 459 |
| M30 | 1-3/16" | 3.5 | 561 |
| M33 | 1-5/16" | 3.5 | 694 |
| M36 | 1-7/16" | 4 | 817 |
Stress areas per ISO 898-1 coarse pitch — the same values behind our tensile-load calculator. Imperial sizes are the nearest equivalent, not exact conversions.
Need a non-standard stud bolt (b7)?
Special size, material, grade, finish, head or thread — we custom-build to your drawing or sample.
Common questions
Can I order in inches?
Yes - switch the unit toggle to inch and the sizes show their imperial equivalent (1/4" to 1-3/8"). We supply to both metric and imperial flange standards.
Do the studs come with nuts?
Each B7 stud is supplied with two A194 Grade 2H heavy hex nuts as standard; hardened washers and PTFE coating are available on request.
Do you deliver nationwide?
Yes - we ship to every city and industrial estate in Pakistan by road freight and trusted couriers, with same-day dispatch from Lahore on stock items.