Studs · Threaded Rods

Stud Bolts & B7 Studs

Full-thread studs, double-end studs and threaded rods — including ASTM A193 B7 studs with A194 2H heavy hex nuts for flanges, valves and oil & gas.

Also calledStud boltB7 studThreaded rodFull thread studDouble end stud

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Overview

About our studs range

We supply stud bolts cut to length or in standard sizes, in high-tensile steel Grade 8.8 and 10.9, ASTM A193 B7 alloy steel and stainless steel. B7 studs are supplied with matching A194 2H heavy hex nuts for flange and pressure applications.

Threaded rods to DIN 975 and studs to DIN 976 are available in metric and inch series, with PTFE (Xylan) and hot-dip galvanized coatings for offshore and outdoor service.

Common sizes we supply: M12, M16, M20, M24 and M30 B7 studs, and 5/8", 3/4", 7/8" and 1" UNC studs for ASME flanges; threaded rods in M8 to M24.

Also known in the trade as: Stud bolt, B7 stud, Threaded rod, Full thread stud, Double end stud, Studding, Flange stud, Tie rod.

Makes / Suppliers

Available makes

UnbrakoB7 studs & 2H nuts

TVS/Sundaram FastenersHigh-tensile studs

Local MakeThreaded rods & cut studs

Specifications

Technical specifications

Material: Alloy steel · ASTM A193 B7 · Stainless steel SS 304 / 316
Grade: 8.8, 10.9 · B7 / B7M · A2-70, A4-70
Standards: DIN 975 (threaded rod) · DIN 976 (stud) · ASTM A193 / A194 · Inch: ANSI B18.31.3
Diameter: Metric M6 – M48 · Inch 1/4" – 2"
Length: 50 mm – 1000 mm (cut to length) · Threaded rods in 1 m / 3 m

Coatings & Finishes

Finishes available

Black Oxide / Self Colour

Standard heat-treated finish with light oil. Default for high-tensile grades 8.8–12.9.

Zinc Plated – White / Clear

Bright silver electroplate for indoor corrosion protection.

Hot-Dip Galvanized (HDG)

Thick zinc coating for outdoor, structural, and construction use.

PTFE / Xylan Coated

Blue or green fluoropolymer coating for oil & gas and offshore studs.

Zinc Flake (Geomet / Dacromet)

Non-electrolytic coating with high corrosion resistance and no hydrogen embrittlement — preferred for 10.9 & 12.9.

Stainless Steel SS 304 (A2)

Natural finish; general corrosion resistance for food, pharma, and outdoor use.

Stainless Steel SS 316 (A4)

Molybdenum grade for marine, chemical, and coastal environments.

Sizes

Stud size chart (metric coarse)

Size	Pitch (mm)	Stress Area (mm²)	2H Nut A/F (mm)	Typical Lengths
M10	1.5	58.0	17	50 – 300 mm
M12	1.75	84.3	19 / 21	60 – 400 mm
M16	2.0	157	27	70 – 500 mm
M20	2.5	245	34	80 – 600 mm
M24	3.0	353	41	100 – 800 mm
M30	3.5	561	50	120 – 1000 mm
M36	4.0	817	60	150 – 1000 mm

Inch B7 studs (UNC / 8UN) for ASME flanges available — share your flange size and class.

FAQ

Common questions

What is a B7 stud?

A B7 stud is a chromium-molybdenum alloy steel stud made to ASTM A193 Grade B7, used with A194 2H heavy hex nuts for flanges and high-temperature, high-pressure service.

Can you cut studs to length?

Yes. Studs and threaded rods can be supplied cut to your required length.