B7 / 2H stud bolt sets
Stud bolts in ASTM A193 B7 with two ASTM A194 2H heavy hex nuts – cut, chamfered and marked in our own production, inch or metric, with EN 10204 3.1 or 3.2 certificates.
- Grades
- ASTM A193 B7 · ASTM A194 2H (B7M / 2HM for sour service)
- Standards
- ASME B18.31.2 · ASME B16.5 · ASME B18.2.2
B7 / 2H stud bolt sets, from stock.
The B7 / 2H set is the standard bolting for ASME B16.5 flanges in oil & gas, petrochemicals and power: alloy steel studs to ASTM A193 B7 (quenched and tempered, −29 °C to +400 °C) with heat-treated carbon-steel nuts to ASTM A194 2H.
Sets are made to the flange size and class, in UNC / 8UN inch threads or metric, plain or coated (Xylan, TAKECOAT-1000, HDG) – 2.000 stud bolts a day, from stock to 39+ countries. Sour service? Choose B7M with 2HM nuts.
Stud bolt sizes and threads.
Inch stud bolts for ASME B16.5 flanges with UNC / 8UN threads, metric stud bolts to DIN 976-1 – each with its matching nut. B7 / 2H stud bolts from stock: lead time within 1 week. Other sizes and lengths on request.
Inch stud bolts – thread and heavy hex nut (ASME B18.2.2)
| Size | Thread | Heavy hex nut, across flats |
|---|---|---|
| 1/2" | 1/2"-13 UNC | 7/8" |
| 5/8" | 5/8"-11 UNC | 1-1/16" |
| 3/4" | 3/4"-10 UNC | 1-1/4" |
| 7/8" | 7/8"-9 UNC | 1-7/16" |
| 1" | 1"-8 UNC | 1-5/8" |
| 1-1/8" | 1-1/8"-8 UN | 1-13/16" |
| 1-1/4" | 1-1/4"-8 UN | 2" |
| 1-3/8" | 1-3/8"-8 UN | 2-3/16" |
| 1-1/2" | 1-1/2"-8 UN | 2-3/8" |
| 1-5/8" | 1-5/8"-8 UN | 2-9/16" |
| 1-3/4" | 1-3/4"-8 UN | 2-3/4" |
| 1-7/8" | 1-7/8"-8 UN | 2-15/16" |
| 2" | 2"-8 UN | 3-1/8" |
| 2-1/4" | 2-1/4"-8 UN | 3-1/2" |
| 2-1/2" | 2-1/2"-8 UN | 3-7/8" |
Metric stud bolts – thread pitch (DIN 976-1)
| Size | Pitch, coarse (mm) | Fine thread |
|---|---|---|
| M12 | 1.75 | M12 × 1.25 · M12 × 1.5 |
| (M14) | 2 | M14 × 1.5 |
| M16 | 2 | M16 × 1.5 |
| (M18) | 2.5 | M18 × 1.5 |
| M20 | 2.5 | M20 × 1.5 |
| (M22) | 2.5 | M22 × 1.5 |
| M24 | 3 | M24 × 2 |
| (M27) | 3 | M27 × 2 |
| M30 | 3.5 | M30 × 2 |
| (M33) | 3.5 | M33 × 2 |
| M36 | 4 | M36 × 3 |
| (M39) | 4 | M39 × 3 |
| M42 | 4.5 | M42 × 3 |
| (M45) | 4.5 | M45 × 3 |
| M48 | 5 | M48 × 3 |
| (M52) | 5 | M52 × 3 |
| M56 | 5.5 | M56 × 4 |
| (M60) | 5.5 | M60 × 4 |
| M64 | 6 | M64 × 4 |
Sizes in brackets are non-preferred sizes in DIN 976-1.
Start with the right pre-selection.
Each link opens the configurator with the material, standard or coating already set – change anything, add the line to your list and request a quote within 24 hours.
- Configure B7 stud bolts with 2H nuts →ASME B18.31.2 · inch or metric · 2 nuts pre-selected
- Heavy hex nuts ASTM A194 2H →ASME B18.2.2 · 1/2" – 1-1/2"
- Stud bolt lengths per flange →ASME B16.5 · class 150, 300 and 600
Dimensions per standard.
Technical datasheets with drawings and dimension tables – free to download.
Send us your parts list.
Same-day confirmation. A complete quote within 24 hours.
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