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
Incoloy 800H All-Thread Bar
Incoloy 800H all-thread bar is continuous-thread bar stock supplied in 1-metre, 2-metre or 3-metre lengths for field cut-to-length applications on hot-zone hanger, support and tensile-link assemblies to 815 deg C (1500 deg F). All-thread bar is functionally equivalent to threaded rod but is supplied in stock-length pieces rather than cut to specific job-length, allowing field cutting and assembly on multiple support brackets from a single bar. TorqBolt manufactures all-thread bar from ASTM B408 round bar in diameter range M12 to M48 (metric) and 1/2 inch to 1-7/8 inch (inch) with thread class 6g per ISO 965 (metric) or class 2A per ASME B1.1 (inch). Both ends carry controlled chamfer for nut start. Every all-thread bar ships with EN 10204 type 3.1 mill test certificate covering heat number, ASTM B408 chemistry, solution-anneal cycle and ASTM grain size 5 verification, with heat-number stamped on one end of each bar segment for traceability preservation through field cuts.
All-Thread Bar Dimensions (Stock Lengths)
| Size designation | Across flats / OD | Head / nut height | Thread pitch | Standard reference |
|---|---|---|---|---|
| M12 | 12.0 mm OD | 1m / 2m / 3m stock length | 1.75 mm (13 tpi UNC) | ASME B1.1 / ISO 965 |
| M16 | 16.0 mm OD | 1m / 2m / 3m stock length | 2.0 mm (11 tpi UNC) | ASME B1.1 / ISO 965 |
| M20 | 20.0 mm OD | 1m / 2m / 3m stock length | 2.5 mm (10 tpi UNC) | ASME B1.1 / ISO 965 |
| M24 | 24.0 mm OD | 1m / 2m / 3m stock length | 3.0 mm (9 tpi UNC) | ASME B1.1 / ISO 965 |
| M30 | 30.0 mm OD | 1m / 2m / 3m stock length | 3.5 mm (8 tpi UNC) | ASME B1.1 / ISO 965 |
| M36 | 36.0 mm OD | 1m / 2m / 3m stock length | 4.0 mm (7 tpi UNC) | ASME B1.1 / ISO 965 |
| M42 | 42.0 mm OD | 1m / 2m / 3m stock length | 4.5 mm (6 tpi UNC) | ASME B1.1 / ISO 965 |
| M48 | 48.0 mm OD | 1m / 2m / 3m stock length | 5.0 mm (5.5 tpi UNC) | ASME B1.1 / ISO 965 |
Manufacturing Route at TorqBolt
All-thread bar manufacture is identical to threaded rod, supplied in stock lengths rather than cut-to-job-length:
- Receive Incoloy 800H bar to ASTM B408; PMI verification on each heat.
- Cut bar to stock length (1m, 2m or 3m) on bandsaw with square-end finish both ends.
- Centerless grind shank to bar tolerance.
- Thread roll end-to-end in continuous pass: class 6g per ISO 965 (metric) or class 2A per ASME B1.1 (inch).
- Both ends chamfered for nut start.
- Solution anneal at 1149 deg C plateau followed by rapid quench; ASTM grain size 5 verified.
- Hardness band 120-184 HB on first piece and one per batch.
- Heat number stamped at controlled intervals along the bar (every 500 mm) to preserve traceability through field cuts.
- Bundle pack with VCI wrap; pack with batch CoC + EN 10204 cert.
All-Thread Bar Sizes Stocked and Lead Times
| Diameter range | Length range | Stock status | Lead time |
|---|---|---|---|
| M12 - M20 | 1m / 2m / 3m stock length | Stock + ex-stock | 7 working days |
| M24 - M30 | 1m / 2m / 3m stock length | Made-to-order from stock bar | 10 to 14 working days |
| M36 - M42 | 1m / 2m / 3m stock length | Made-to-order from stock bar | 14 to 21 working days |
| M48 | 1m / 2m / 3m stock length | Made-to-order, large bar | 3 to 5 weeks |
Inspection and Heat Marking
All-thread bar specific inspections cover end-to-end thread continuity, heat-number stamping at controlled intervals and straightness:
- Full-length thread verified with ring gauge full-traverse from both ends.
- Straightness checked to 0.5 mm per metre over full length.
- Heat number stamped at controlled intervals (every 500 mm) for traceability preservation.
- Both-end chamfer integrity verified for nut start.
- Hardness band 120-184 HB on first piece and one per batch.
- ASTM E112 grain-size etch verification.
- PMI by X-ray fluorescence on first piece and one per batch.
- Visual inspection for thread damage along full length.
Typical Service Conditions
All-thread bar is specified for field cut-to-length applications and stock-room standardization on hot-zone hanger and support construction:
- Heat exchanger field-installed tube-bundle suspension brackets.
- Reformer field-installed pigtail support clamps.
- Pressure-vessel internal-tray field-installed support construction.
- Furnace component field-installed retort hanger construction.
- Ethylene cracker field-installed radiant-coil support construction.
- Steam superheater field-installed tube-bank guide construction.
Incoloy 800H Alloy Considerations on This Fastener Form
Companion Fasteners and Related Pages
- Threaded Rod: cut-to-length variant for shop-fabricated assemblies.
- Coupling Nuts: matched coupling nuts for joining bar segments.
- Hex Nuts: matched standard nuts for bar-end fastening.
- Heavy Hex Nuts: heavy-pattern alternative for high-load assemblies.
- Washers: matched washers for bar-end assemblies.
Frequently Asked Questions
Q. What is the difference between all-thread bar and threaded rod?
Functionally identical (both are continuous-thread bar stock). The trade convention is: threaded rod is cut-to-length on the supplier side per job line item; all-thread bar is supplied in stock lengths (1m, 2m, 3m) for field cut-to-length. TorqBolt offers both.
Q. How is heat-number traceability preserved when cut in the field?
Heat number is stamped at controlled intervals (every 500 mm) along the bar. After field cut, the remaining segment carries the heat-number stamp within 500 mm; the offcut also carries the next downstream stamp. Field cuts do not invalidate the heat certificate provided the heat number is preserved on the installed segment.
Q. Are inch sizes available?
Yes. Inch sizes 1/2 inch through 1-7/8 inch with class 2A UNC threads per ASME B1.1 are machined on PO call-out.
Q. What is the longest stock length supplied?
Standard supply is 3 metres maximum. Bundle packing accommodates 6-bar bundles for shop logistics. Longer custom lengths are quoted on PO call-out.
Q. Does the EN 10204 certificate cover the full stock length?
Yes. One certificate covers the full bar segment as supplied. After field cut, the certificate remains valid for the installed segment; the offcut should be tagged with the heat number to retain traceability.
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