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
Hiduron Stud Bolt Dimensions: Imperial and Metric
Hiduron stud bolts are manufactured to ASME B1.1 imperial UNC and to ISO 261 metric coarse pitch as standard. This page tables the full dimensional envelope across both series: diameter, thread series and pitch, pitch diameter, stress area and length range. Stress area values are geometric and match the standard ASME and ISO tables; combine with the alloy-specific 0.2 percent proof strength to compute working load capacity per size. Standard envelope runs M12 to M100 metric and 1/2 inch to 3 inch imperial. Larger sizes quote project-specific.
Imperial Stud Bolt Dimensions (1/2 inch to 3 inch)
| Nominal diameter (in) | Thread (UNC tpi) | Pitch diameter (in) | Stress area (in^2) | Standard length range (in) |
|---|---|---|---|---|
| 1/2 | 13 (UNC) | 0.4500 | 0.142 | 2 to 12 |
| 5/8 | 11 (UNC) | 0.5660 | 0.226 | 2.5 to 14 |
| 3/4 | 10 (UNC) | 0.6850 | 0.334 | 3 to 16 |
| 7/8 | 9 (UNC) | 0.8028 | 0.462 | 3.5 to 18 |
| 1 | 8 (UNC) | 0.9188 | 0.606 | 4 to 20 |
| 1 1/8 | 7 (UNC) | 1.0322 | 0.763 | 4.5 to 20 |
| 1 1/4 | 7 (UNC) | 1.1572 | 0.969 | 5 to 22 |
| 1 3/8 | 6 (UNC) | 1.2667 | 1.155 | 5.5 to 22 |
| 1 1/2 | 6 (UNC) | 1.3917 | 1.405 | 6 to 24 |
| 1 3/4 | 5 (UNC) | 1.6201 | 1.90 | 7 to 24 |
| 2 | 4.5 (UNC) | 1.8557 | 2.50 | 8 to 24 |
| 2 1/4 | 4.5 (UNC) | 2.1057 | 3.25 | 9 to 24 |
| 2 1/2 | 4 (UNC) | 2.3376 | 4.00 | 10 to 24 |
| 2 3/4 | 4 (UNC) | 2.5876 | 4.93 | 11 to 24 |
| 3 | 4 (UNC) | 2.8376 | 5.97 | 12 to 24 |
The imperial envelope above covers the ASME B1.1 UNC thread series for stud bolts cut to ASME B16.5 flange bolt-up requirements. Stress areas are geometric and match the A193 standard. Apply the Hiduron 0.2 percent proof to compute the working load capacity per size.
Metric Stud Bolt Dimensions (M12 to M100)
| Nominal diameter (mm) | Pitch (mm, coarse) | Pitch diameter (mm) | Stress area (mm^2) | Standard length range (mm) |
|---|---|---|---|---|
| M12 | 1.75 | 10.863 | 84.3 | 50 to 300 |
| M14 | 2.00 | 12.701 | 115 | 50 to 300 |
| M16 | 2.00 | 14.701 | 157 | 50 to 350 |
| M20 | 2.50 | 18.376 | 245 | 60 to 400 |
| M24 | 3.00 | 22.051 | 353 | 70 to 450 |
| M27 | 3.00 | 25.051 | 459 | 80 to 450 |
| M30 | 3.50 | 27.727 | 561 | 90 to 500 |
| M33 | 3.50 | 30.727 | 694 | 100 to 500 |
| M36 | 4.00 | 33.402 | 817 | 100 to 500 |
| M42 | 4.50 | 39.077 | 1120 | 120 to 550 |
| M48 | 5.00 | 44.752 | 1470 | 140 to 600 |
| M56 | 5.50 | 52.428 | 2030 | 160 to 600 |
| M64 | 6.00 | 60.103 | 2680 | 180 to 600 |
| M72 | 6.00 | 68.103 | 3460 | 200 to 600 |
| M80 | 6.00 | 76.103 | 4340 | 220 to 600 |
| M90 | 6.00 | 86.103 | 5590 | 240 to 600 |
| M100 | 6.00 | 96.103 | 7000 | 260 to 600 |
The metric envelope covers ISO 261 coarse pitch for stud bolts cut to EN 1515-1 flange make-up and ISO 4014 hex bolt blanks. Coarse pitch is the default for subsea, naval and petrochemical bolting where assembly speed and thread robustness govern. Fine-pitch series (ISO 262) is available on call-out where the design carries vibration or where the connector body wall thickness limits coarse-pitch thread engagement.
Lead Time per Size Band
| Size band | Standard lead time | NACE 3.2 lead time | Notes |
|---|---|---|---|
| M12 to M30 / 1/2 to 1 1/4 inch | 4 to 6 weeks | 6 to 8 weeks | Stock-driven; small lot sizes accepted |
| M33 to M48 / 1 3/8 to 2 inch | 6 to 8 weeks | 8 to 10 weeks | Bar stock typically available |
| M56 to M72 / 2 1/4 to 3 inch | 8 to 12 weeks | 10 to 14 weeks | Forging slot pre-booking helps |
| M80 to M100 / above 3 inch | 12 to 16 weeks | 14 to 18 weeks | Project-specific quote; large billet sourcing |
Specification Block to Send With Enquiry
To compress quote turnaround, send the following block with the enquiry: (1) Hiduron grade (130 or 191); (2) thread series (UNC / metric coarse / metric fine); (3) stud nominal diameter and length; (4) end finish (cut-thread, rolled-thread, full-thread, double-end); (5) nut and washer requirement (matching grade, quantity per stud); (6) certification level (3.1 default, 3.2 on call-out, NACE on call-out); (7) surface treatment (bare-bright default; xylan/PTFE on call-out); (8) packaging and marking spec (loose, kitted, head-stamp call-out). With this block in hand TorqBolt typically returns a fixed quote within 48 hours for sizes inside the standard envelope.
Flange Class to Stud Size Mapping
| Flange class | Nominal pipe size | Stud diameter | Stud quantity per flange |
|---|---|---|---|
| ASME B16.5 class 600 | 4 inch NPS | 1 inch (UNC) | 8 |
| ASME B16.5 class 900 | 4 inch NPS | 1 1/4 inch (UNC) | 8 |
| ASME B16.5 class 1500 | 4 inch NPS | 1 3/8 inch (UNC) | 8 |
| ASME B16.5 class 2500 | 4 inch NPS | 1 3/4 inch (UNC) | 8 |
| EN 1092-1 PN100 | DN100 | M30 (coarse) | 8 |
| EN 1092-1 PN160 | DN100 | M33 (coarse) | 12 |
| API 6A 5000 psi | 4 1/16 inch bore | 1 1/8 inch (UNC) | 12 |
| API 6A 10000 psi | 4 1/16 inch bore | 1 5/8 inch (UNC) | 12 |
The mapping above is the working procurement cross-reference for ASME, EN and API 6A flange classes in the 4 inch / DN100 nominal pipe size. The same logic extends to other pipe sizes per the respective flange standard. Hiduron grade selection (130 or 191) is independent of flange class and follows the service envelope per the selection matrix.
Related Hiduron Pages
- Hiduron Stud Bolts: Cu-Ni-Al stud bolts for marine and subsea flange make-up.
- Hex Bolts: DIN 931 / ISO 4014 metric hex bolts.
- Heavy Hex Bolts: ASME B18.2.1 imperial heavy hex bolts.
- Nuts: Matching grade nuts for stud bolt assemblies.
- Heavy Hex Nuts: ASME B18.2.2 heavy hex nuts.
- Washers: Flat, spring and locking washers.
- Torque Chart: Tightening torque values for Hiduron stud bolts.
- Bolt Dimensions Reference: Head, thread and stress-area reference tables.
- Mechanical Properties: 0.2 percent proof and tensile data for load capacity.
Frequently Asked Questions
Q. What is the largest stud bolt diameter TorqBolt manufactures in Hiduron?
Standard envelope is M100 (metric) or 3 inch (imperial). Above that diameter we quote project-specific against forging-house availability of large-section Hiduron 191 billet. M120 and 4 inch sizes are achievable on a 14 to 18 week lead time.
Q. What thread series is standard on Hiduron stud bolts?
Metric coarse (ISO 261 / ISO 262 6g/6H tolerance) is the default for European and subsea procurement. UNC (ASME B1.1 2A/2B tolerance) is the default for US, oilfield API 6A and ASME B16.5 flange bolting. Both series are stocked across the standard size range; specify the series with the order.
Q. Why does the stress area on Hiduron studs match standard ASME tables?
Stress area is a geometric calculation based on thread diameter and pitch, not on alloy. Hiduron studs cut to ASME B1.1 unified inch threads have the same stress area as A193 B7 studs of the same size. The proof load capacity differs because Hiduron mechanicals differ from A193 B7, but the geometry table is identical.
Q. What is the longest stud bolt length TorqBolt manufactures?
Standard fastener length envelope is 600 mm on the metric side and 24 inch on the imperial side. Longer studs are available cut from round bar with custom thread on each end; specify the centre length, the threaded length each end, and the surface treatment.
Q. Are washers and nuts available in matching Hiduron grade?
Yes. Stud bolts ship with nuts (heavy hex per ASME B18.2.2 or DIN EN ISO 4032) and washers (flat per DIN 125 or ASME B18.22.1) in the same Hiduron grade as the stud. Specify the grade match on the order to avoid galvanic mixing in the make-up.
Request a Quote
TorqBolt supplies Hiduron 130 (UNS C72400, DTD 900/4805) and Hiduron 191 (UNS C72420, NES 835, DEF STAN 02-835, DOD-C-24676) in round bar, stud bolts, hex bolts, heavy hex bolts, nuts, washers, forgings and machined components. Standard fastener lead time is 4 to 8 weeks from order, subsea machined components quote project-specific lead time. Send an enquiry through TorqBolt Contact with the controlling specification, the form factor, the size envelope and the certification level (3.1 default, 3.2 on call-out, NACE on call-out).
Request a Quote on Hiduron 130 and Hiduron 191 Bolting Stock and Fasteners
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