Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASME B16.5 Full Thread Stud Bolts
Imperial-dimensioned stud bolts tailored for ASME B16.5 inch flanges, ensuring secure connections in North American and global piping networks.
ASME B16.5 Full Thread Stud Bolts are the standard fastening solution for pipe flanges manufactured to the ASME B16.5 inch (NPS) specifications, widely used in the United States and many international oil and gas projects. These stud bolts are calculated to specific lengths based on the flange nominal pipe size (NPS) and pressure class, ensuring that when installed with heavy hex nuts, they provide the correct clamp load to compress the gasket effectively. The "full thread" or extended thread design accommodates the varying thickness of raised face flanges and ring-type joint (RTJ) flanges. Available in materials ranging from carbon steel (ASTM A193 B7) to stainless steel (B8M), these imperial studs are the backbone of process piping infrastructure, guaranteeing safety and reliability in systems transporting steam, hydrocarbons, and chemicals at extreme pressures and temperatures.
ASME B16.5 Dimensions for Flange Bolting Studs (mm)
| Nominal Size | Diameter, D | Chamfered Thread Distance, U | |||||
|---|---|---|---|---|---|---|---|
| UNC Threads | UNF Threads | 8UN Threads | |||||
| Min. | Max. | Min. | Max. | Min. | Max. | ||
| 1/4 | 6.350 | 1.270 | 2.540 | 0.914 | 1.803 | … | … |
| 5/16 | 7.938 | 1.422 | 2.819 | 1.067 | 2.108 | … | … |
| 3/8 | 9.525 | 1.600 | 3.175 | 1.067 | 2.108 | … | … |
| 7/16 | 11.113 | 1.829 | 3.632 | 1.270 | 2.540 | … | … |
| 1/2 | 12.700 | 1.956 | 3.912 | 1.270 | 2.540 | … | … |
| 9/16 | 14.288 | 2.134 | 4.242 | 1.422 | 2.819 | … | … |
| 5/8 | 15.875 | 2.311 | 4.623 | 1.422 | 2.819 | … | … |
| 3/4 | 19.050 | 2.540 | 5.080 | 1.600 | 3.175 | … | … |
| 7/8 | 22.225 | 2.819 | 5.639 | 1.829 | 3.632 | … | … |
| 1 | 25.400 | 3.175 | 6.350 | 2.134 | 4.242 | … | … |
| 1 1/8 | 28.575 | 3.632 | 7.264 | 2.134 | 4.242 | 3.175 | 6.350 |
| 1 1/4 | 31.750 | 3.632 | 7.264 | 2.134 | 4.242 | 3.175 | 6.350 |
| 1 3/8 | 34.925 | 4.242 | 8.458 | 2.134 | 4.242 | 3.175 | 6.350 |
| 1 1/2 | 38.100 | 4.242 | 8.458 | 2.134 | 4.242 | 3.175 | 6.350 |
| 1 5/8 | 41.275 | … | … | … | … | 3.175 | 6.350 |
| 1 3/4 | 44.450 | 5.080 | 10.160 | … | … | 3.175 | 6.350 |
| 1 7/8 | 47.625 | … | … | … | … | 3.175 | 6.350 |
| 2 | 50.800 | 5.639 | 11.278 | … | … | 3.175 | 6.350 |
| 2 1/4 | 57.150 | 5.639 | 11.278 | … | … | 3.175 | 6.350 |
| 2 1/2 | 63.500 | 6.350 | 12.700 | … | … | 3.175 | 6.350 |
| 2 3/4 | 69.850 | 6.350 | 12.700 | … | … | 3.175 | 6.350 |
| 3 | 76.200 | 6.350 | 12.700 | … | … | 3.175 | 6.350 |
| 3 1/4 | 82.550 | 6.350 | 12.700 | … | … | 3.175 | 6.350 |
| 3 1/2 | 88.900 | 6.350 | 12.700 | … | … | 3.175 | 6.350 |
| 3 3/4 | 95.250 | 6.350 | 12.700 | … | … | 3.175 | 6.350 |
| 4 | 101.600 | 6.350 | 12.700 | … | … | 3.175 | 6.350 |
ASME B16.5 Flange Bolting Stud Length Tolerances (mm)
| Range, L | Tolerances |
|---|---|
| From 19.05 through 304.8 | ±1.575 |
| Over 304.8 through 457.2 | ±3.175 |
| Over 457.2 | ±6.350 |
Frequently Asked Questions
- What does ASME B16.5 full-thread stud bolts for ASME B16.5 flanges cover?
- ASME B16.5 is the inch dimensional standard for full-thread stud bolts for ASME B16.5 flanges. It defines head dimensions, body diameter, thread length, total length, drive recess, and tolerances so any compliant full-thread stud bolts for ASME B16.5 flanges interchanges with standard nuts, washers and wrenches across manufacturers.
- What size range is available for full-thread stud bolts for ASME B16.5 flanges under ASME B16.5?
- full-thread stud bolts for ASME B16.5 flanges under ASME B16.5 covers 1/2 in to 4 in nominal diameter, lengths matched to flange Class 150–2500 stud chart. TorqBolt manufactures the full range in ASTM A193 Grades B7, B7M, B8, B8M and the full ASTM A320 cryogenic counterpart on customer specification.
- What is the metric/inch counterpart of ASME B16.5 full-thread stud bolts for ASME B16.5 flanges?
- The companion specification for full-thread stud bolts for ASME B16.5 flanges is ASME B16.47 large-diameter flange studs. Both standards share equivalent functional dimensions but use the corresponding measurement system (inch vs metric ISO M-series).
Satisfaction Survey
