RapidBolt
Certified Stud Bolts & Exotic Alloy Fasteners Supplied to US Energy Projects
ASTM A193 B7, A320 L7, B16, A453 660, duplex, super duplex and nickel alloy bolting in 1/4″ to 6″ ASME inch sizes (and M5 to M150 metric), with EN 10204 3.1 MTRs and full heat-number traceability.
Houston · Baytown · Beaumont · Corpus Christi · Lake Charles · Gulf of Mexico · Permian
Exported to the USA
Specialty grades, documented before they ship.
Commodity B7 is easy to find in the United States. Inconel 718 studs in 8UN, super duplex heavy hex nuts with full PMI, or A320 L7 with Charpy results at the project design temperature are not — and those are the joints where a late or undocumented delivery stops a turnaround.
We supply the specialty end of the bolting schedule to US refineries, LNG terminals, offshore operators, EPCs and OEMs: grade-matched studs and nuts, coatings with controlled friction data, and certification packs compiled before dispatch so QA review runs in parallel with freight.
Engineered supply, not off-the-shelf. Every quotation states grade, mill source, country of origin, HS code, certification level and lead time.
ASME inch sizes from 1/4″ to 6″
| ITEM | IMPERIAL | METRIC | STANDARD |
|---|---|---|---|
| Flange stud bolts (B7, B7M, L7, B16) | 1/4" – 6" dia, UNC / 8UN | M5 – M150 | ASME B16.5 / B16.47 lengths |
| Heavy hex bolts | 1/4" – 6" dia | M5 – M150 | ASME B18.2.1 |
| Heavy hex nuts (2H, 4, 7, 8M) | 1/4" – 6" | M5 – M150 | ASME B18.2.2 |
| Duplex / super duplex / nickel alloy studs | 1/4" – 6" dia | M5 – M150 | ASME B1.1 threads |
UNC, UNF and 8UN threads to ASME B1.1. Sizes listed are typical enquiry ranges; final size, grade and quantity are confirmed per RFQ.
Where we deliver in the United States
Texas Gulf Coast — Refining & Petrochemical
Houston Ship Channel, Baytown, Pasadena, Freeport, Port Arthur, Beaumont and Corpus Christi refining, olefins and chemical process plant flange bolting.
Louisiana — LNG Export & Chemical
Lake Charles, Cameron, Plaquemines and the Mississippi River chemical corridor between Baton Rouge and New Orleans.
Gulf of Mexico — Offshore & Subsea
Topsides, subsea manifolds, risers and wellhead equipment where duplex, super duplex and nickel alloy bolting is specified.
Permian & Appalachian Basins
Gas processing, compression and midstream facilities in West Texas, New Mexico, Pennsylvania, Ohio and West Virginia.
West Coast & Alaska
California and Washington refining, marine terminals, and North Slope / Cook Inlet cold-service bolting.
Power Generation & OEM
Gas turbine, HRSG, nuclear-adjacent and OEM equipment packages that need high-temperature and creep-resistant grades.
Sectors we supply in the USA
Oil, Gas & LNG
Liquefaction trains, offshore topsides, subsea and pipeline flange joints.
Refining & Chemical
Hydrotreaters, crackers, exchangers and corrosive chemical process duty.
Power Generation
Turbine casing, steam and HRSG bolting in high-temperature service.
Mining & Minerals
Processing plant, pumps, valves and large-diameter machined components.
Common US supply requirements
Shipping terms for the USA
Import duties, including any Section 232 steel or steel-derivative measures, are the buyer's responsibility and are determined by US Customs and Border Protection. We state HS code and country of origin on every quotation so your broker can confirm treatment before you order. This is not customs or legal advice.
Certified to the standards US projects specify.
MTRs, PMI, hardness and impact data and dimensional reports are compiled and sent before dispatch. Testing & certification
Questions US buyers ask
Do you supply stud bolts and special fasteners to the USA?
Yes. Energy Materials Group supplies certified stud bolts, heavy hex bolts and nuts, washers, gaskets and special fasteners to US refining, petrochemical, LNG, offshore, power generation and mining projects. Shipments are quoted DAP, CIF, CFR, FOB or EXW to your nominated consignee or customs broker.
Do you supply imperial (inch) sizes to ASME standards?
Yes. Imperial sizes from 1/4" to 6" diameter in UNC, UNF and 8UN threads to ASME B1.1, with stud lengths to ASME B16.5 / B16.47 flange classes and heavy hex dimensions to ASME B18.2.1 / B18.2.2. Metric sizes from M5 to M150 are also available. Final size, grade and quantity are confirmed per RFQ.
Which grades do US projects most often request?
ASTM A193 B7 and B7M with A194 2H / 2HM nuts, A320 L7 for low-temperature service, A193 B16 and A453 660 for high temperature, duplex and super duplex for offshore and produced water, and Inconel 625 / 718, Monel and Hastelloy C-276 for corrosive and high-temperature duty.
What certification ships with US orders?
EN 10204 3.1 material test reports as standard, or 3.2 with third-party witness, under our ISO 9001:2015 quality system with heat-number traceability. PMI, hardness, Charpy impact and dimensional reports are supplied where the specification calls for them.
How do US import duties apply?
Duty and tariff treatment, including Section 232 steel and steel-derivative measures, is determined by US Customs and Border Protection on HS classification, material content and origin. We state HS code and country of origin on every quotation so your broker can confirm treatment before you order. Import duties are the buyer's responsibility, and this is not customs or legal advice.
Can you respond in US business hours?
Our Brisbane team overlaps with the US afternoon and evening. Send RFQs by email at any time and quotations are typically returned the next US business morning.
Do you supply retail or general hardware fasteners?
No. We supply engineered, certified fasteners for industrial and energy projects only, against company purchase orders and technical specifications.