ZNiBolt
A193 B7 Stud Bolt – representative photo

Representative photo. Finish, head marking and packaging follow your order.

Stud Bolts

ASTM A193 B7 Stud Bolt with A194 2H Nuts

Fully threaded stud bolts in ASTM A193 Grade B7 (Cr-Mo alloy steel, quenched and tempered) with two A194 2H heavy hex nuts, cut to flange length per ASME B16.5. Coated PTFE, zinc-nickel, HDG or plain/black, with EN 10204 3.1 certificates available.

Standard
ASTM A193 B7 / ASME B16.5 lengths
Equivalents
A193 B7M, A320 L7 (low temp.)
Sizes
1/2" – 4"; M12 – M64
Lengths
Cut to flange
Grades
B7, B7M
Materials
AISI 4140 / 4142 alloy steel
Thread
UNC / 8UN 2A or metric
MOQ
500 pcs per size (negotiable for trial orders)
Request a QuoteWhatsApp
Ldplain / full thread

Features

  • Quenched and tempered Cr-Mo steel
  • Supplied with two 2H nuts
  • PTFE colours for identification

Finishes

FinishAppliedNotes
Black oxide / phosphateAvailableIndoor or oiled service
Zinc-nickelOur own line12–15 µm, clear or black passivation; 1,000 h (12 µm) to 1,440 h (15 µm) neutral salt spray
Hot-dip galvanizedAvailableISO 10684 / ASTM F2329; nuts tapped oversize to suit
Zinc flake (Dacromet/Geomet type)AvailableElectrolyte-free, no hydrogen embrittlement risk

For property class 10.9 and above, choose zinc flake, or zinc-nickel with hydrogen-embrittlement relief agreed at order stage.

Applications

  • Pipeline flanges
  • Pressure vessels
  • Valves and pumps

Ordering terms

MOQ
500 pcs per size (negotiable for trial orders)
Mixed sizes
Welcome in one order
Samples
Samples available — cost and lead time quoted per request
Lead time
15–25 days for standard parts; finishes such as HDG or Dacromet add a few days
Payment
T/T 30% deposit, 70% before shipment
Shipping
FOB Ningbo / CIF / DDP on request
Packaging
Cartons on pallets, or private-label boxes and bags
Documents
Material certificate, coating thickness and salt-spray reports on request
Custom
Drawings, non-standard sizes, coatings, marking and private-label packaging

A193 B7 Stud Bolt FAQ

Which coating eases stud removal?
PTFE (fluoropolymer) over a zinc or phosphate base, or zinc-nickel; both reduce galling and seizing.

Request a quote for A193 B7 Stud Bolt

Tell us size, grade, finish and quantity. We reply with price and lead time within 24 hours.

We reply within 24 hours (China time). Your details are used only to answer this inquiry.

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