ASME B16.5 — Stud bolts RF / RTJ — Class 600 (partial)
ASME B16.5 Stud bolts RF / RTJ — Class 600 (partial) — 8 sizes. Single-source reference — verify before use.
| NPS | No. of studs | Stud dia. (in) | Stud length RF (mm) | Stud length RTJ (mm) |
|---|---|---|---|---|
| 1/2 | 4 | 1/2 | 75 | 75 |
| 1 | 4 | 5/8 | 90 | 90 |
| 2 | 8 | 5/8 | 110 | 110 |
| 6 | 12 | 1 | 170 | 170 |
| 8 | 12 | 1-1/8 | 190 | 195 |
| 12 | 20 | 1-1/4 | 220 | 220 |
| 20 | 24 | 1-5/8 | 285 | 290 |
| 24 | 24 | 1-7/8 | 330 | 335 |
- PARTIAL — only rows exposed in search results (Pipingmart table, Wermac convention).
- Wermac convention: length excludes points (chamfers); RF lengths allow for one spiral wound gasket (4.5 mm sealing element compressed to ~3 mm). Other publishers use different allowances and round differently — lengths are not interchangeable between tables.
- Piping-World RTJ chart matches NPS 8 (195) and 20 (290); its RF chart matches NPS 8 (190). Boltport NPS 24 13.00 in (~330 mm) consistent. Other rows single-source.
Sources: pipingmart.com/blog/dimensions/pipe-fittings/dimensions-stud · piping-world.com/stud-bolt-dimensions-for-class-600-rtj-flan · piping-world.com/stud-bolt-dimensions-for-class-600-rf-flang · a193gradeb16.com/stud-bolts-size-chart-for-b16.5-class-600-f