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B7 studs

Product: B7 STUDS
Standard: DIN976
Raw material: Carbon steel stainless steel .
Surface: Plain Black Zinc plated TEFLON etc..
Size Range: M4-M39 length customized products are available
CLASS: B7
Thread Angles: 60°

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Product Introduction

Core Info

Product: B7 RODS

Standard: DIN976 A193 B7

Raw material: B7 42CRMO stainless steel .

Surface: Plain Black Zinc plated TEFLON etc..

Size Range: M4-M39

CLASS: B7 10.9

Product Overview

Threaded rods (also called all-thread rods or stud bolts) are integral fasteners featuring continuous external threads along their entire length. Compliant with international and national standards such as DIN 975, ISO 898-1, and GB/T 15389, they are designed for modular connection, fastening, or hanging applications. By pairing with nuts, washers, or other threaded components, they enable adjustable and detachable assemblies. Widely used in construction, machinery, electrical equipment, and industrial installations, they excel in scenarios requiring long-span fastening, position adjustment, or heavy-load bearing.

Key Specifications

Raw Materials

Alloy steel : b7 42crmo 35crmo

Stainless steel: 304 316 316L

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suitable g precision a

Specification Range

Metric: Diameter M6–M36, length 30mm–100mm Inch:1/4'-2' length 2'-12' (customizable for longer lengths);
Thread types: Coarse thread (UNC/metric coarse) and fine thread (UNF/metric fine), based on application requirements.

Performance Grades

Carbon steel:

10.9 (meets general load demands);

Alloy steel:

B7 10.9, 12.9

Stainless steel:

A2-70, A4-70

Core Characteristics

Full-thread design: Enables flexible adjustment of nut positions for precise assembly and leveling;

Strong load-bearing capacity: Continuous thread structure ensures uniform force distribution, suitable for tension and compression loads;

Versatile assembly: Compatible with various nuts, washers, and connectors for diverse installation needs;

Easy customization: Cuttable to arbitrary lengths on-site, adapting to irregular installation spaces;

Detachable and reusable: Facilitates maintenance, replacement, and modification of assemblies.

Application Fields

ASTM A193 B7 short threaded studs are quenched & tempered Cr-Mo steel fasteners. They sustain stable clamping force under high temperature and pressure. Mainly applied to flange joints, reactors, heat exchangers, boiler & steam turbine fittings for oil, chemical, power and heavy industrial equipment.

Usage Precautions

1,Match with A194 2H nuts; use TEFLONG coating for anti-seize.,

2,Control tightening torque to avoid thread damage.

3,Avoid heavy scratches on coated surface during installation.,

4,Not suitable for strong corrosive media without protective coating.

5,Store in dry environment to prevent rust.

Sales & Logistics

Markets:

North America, Europe, Asia-Pacific, and Middle East;

Packaging:

Small bags, cartons, pallets (customizable packaging available);

Orders:

Accepts bulk and small-batch purchases; delivery terms negotiable.

Quality Assurance

ISO9001 API-20E certified; all products undergo thread accuracy, dimensional tolerance, tensile strength, and corrosion resistance testing;
Provides long-term quality guarantees and technical support for installation and matching.

FAQ: Key Differences from Rods

Item	A193 B7 Short Stud	Ordinary Threaded Rod
Material	4140 Cr-Mo alloy steel	Low carbon steel Q235
Strength	High tensile & yield strength, high temperature resistant	Low strength, only for room temperature
Matching Nut	ASTM A194 2H heavy hex nut	Grade 4 / 6 common carbon steel nut
Working Condition	High temp, high pressure, oil, chemical, power flanges & vessels	Low-load general machinery, light construction
Standard & Test	ASTM A193, strict mechanical performance inspection	DIN975/GB, only dimension check

Established in 2005, our company has evolved over two decades of continuous development into a leading regional enterprise in the fastener industry with fully automated end-to-end production. With an annual output value exceeding RMB 130 million, our product range covers diverse market segments from mid-range to high-end and is distributed worldwide