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Wire Bolts Suppliers | Factory-Direct, Custom, Fast Shipping

Oct . 22, 2025 13:25 Back to list

Wire Bolts Suppliers | Factory-Direct, Custom, Fast Shipping


An Insider’s Guide to Wire Bolts Suppliers and Double End Stud Bolts

If you buy fasteners for a living (or you’ve been thrown into it—happens a lot), double end stud bolts are probably on your weekly RFQ list. They’re deceptively simple: threads on both ends, a plain shank in the middle. Yet the difference between a good stud and a liability? Usually hidden in material control, heat treatment, and thread integrity.

Wire Bolts Suppliers | Factory-Direct, Custom, Fast Shipping

What’s moving in the market

A few trends keep coming up: API 20E/20F compliance requests from oil and gas, rising demand for hot-dip galvanized studs for coastal wind projects, and traceability down to heat number as a standard expectation—not a “nice to have.” Many buyers also ask for magnetic particle inspection on critical diameters ≥M24. And yes, shorter lead times are back in fashion (weren’t they always?).

Product snapshot: Double end stud bolts (origin: Southwest of Road Taibai, Yongnian District, Handan City, Hebei Province, China)

Materials: carbon steel (8.8/10.9), alloy (ASTM A193 B7/B16), stainless (A2-70/A4-80). Coatings: black oxide, zinc, mechanical zinc, HDG, Dacromet, Zn-Ni. Threads: metric (ISO 965-2) or UNC/UNF (ASME B1.1), rolled or cut.

Parameter Typical Range (≈) Notes
Diameter M6–M48 (1/4"–2") Larger sizes on request
Length (L) 30–1500 mm Custom cut lengths
Thread length each end 2d–3d Per ASME B18.31.2/ISO practice
Tensile strength 800–1040 MPa (8.8–10.9); B7 ≥125 ksi Real-world use may vary
Certs ISO 9001, IATF 16949 (on request) EN 10204 3.1 MTC
Wire Bolts Suppliers | Factory-Direct, Custom, Fast Shipping

How reputable Wire Bolts Suppliers build them

  • Material prep: mill-cert bar per ISO 898-1/ASTM A193; heat traceability kept.
  • Cutting & chamfer: cold-saw or shear; ends faced to tolerance.
  • Threading: rolled for fatigue resistance (preferred) or cut for odd sizes.
  • Heat treatment: quench/temper for 8.8/10.9 and B7; hardness checked (HRC).
  • Finishing: zinc/HDG per ISO 4042/ASTM A153; thickness verified.
  • Testing: tensile (ASTM A370), proof load, MPI for critical studs, salt spray (ASTM B117, e.g., 240–720 h), GO/NO-GO per ISO 1502.

Service life: around 10–25 years with proper coating and torque discipline; offshore may need duplex stainless or thermal spray. Honestly, installation torque and gasket selection make or break it.

Wire Bolts Suppliers | Factory-Direct, Custom, Fast Shipping

Where they’re used

Flange joints in petrochem, skid packages, structural steel splices, mining conveyors, wind hubs, rail infrastructure. Many customers say rolled-thread B7 studs reduced fatigue failures on vibrating assemblies—small change, big win.

Vendor landscape at a glance

Vendor Type Lead Time Certs Customization Price Index
Factory in Hebei (origin listed above) 7–20 days ISO 9001, IATF (often) High: non-standard threads, HDG, markings $
Trading house Varies Depends on source Medium $$
Global brand Stock + MTO API 20E/20F options High $$$

Customization tips

Ask Wire Bolts Suppliers for: rolled threads on both ends, partial-thread control (2d vs 3d), nut compatibility (A194 2H/8), dual certs (ISO 898-1 + ASTM A193), and torque-tension charts. Marking with heat number on the shank saves headaches later.

Wire Bolts Suppliers | Factory-Direct, Custom, Fast Shipping

Quick case note

A refinery turnaround needed 3,000 pcs M30×260 B7 studs, HDG, in 10 days. The Hebei factory rolled the threads, ran 480 h salt-spray panels for reference (ASTM B117), and shipped with 3.1 certs. Maintenance reported smoother run-in torque and fewer re-torques after hydrotest—anecdotal, but consistent with rolled-thread behavior.

References:

  1. ISO 898-1: Mechanical properties of fasteners — Carbon steel and alloy steel.
  2. ASTM A193/A194: Alloy-Steel and Stainless Steel Bolting for High-Temp or High-Pressure Service.
  3. ASME B18.31.2: Threaded Rods and Studs.
  4. ISO 3506-1: Stainless steel fasteners — Mechanical properties.
  5. ASTM B117: Standard Practice for Operating Salt Spray (Fog) Apparatus.
  6. ISO 4042: Fasteners — Electroplated coatings.
  7. API 20E/20F: Alloy and Corrosion-Resistant Bolting for Oil and Gas Industry.
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