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ASTM A307 Grade A Threaded Rods Manufacturer & Exporter in India

Explore ASTM A307 Grade A Threaded Rods Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are ASTM A307 Grade A Threaded Rods?

ASTM A307 Grade A threaded rods are low carbon steel fasteners manufactured to the ASTM A307 specification, designed for general-purpose, non-critical bolting applications. These rods are produced from mild steel and are supplied in a plain, hot-dip galvanized, or zinc-plated finish. They are commonly used for anchoring, bracing, and joining structural elements in construction, HVAC, and light industrial assemblies where high strength is not required.

ASTM A307 Grade A threaded rods are available in a wide range of diameters and lengths, with coarse or fine thread forms per ASME B1.1 (Unified Inch) or ISO metric standards. They are not intended for high-pressure or high-temperature service but offer reliable performance for everyday fastening needs in building and infrastructure projects.

Quick Specifications

MaterialLow Carbon Steel
ASTM GradeA307 Grade A
UNS NumberK02201
Material StandardASTM A307
Threaded Rod StandardASME B18.31.3 / DIN 976-1
Thread FormUNC / UNF / Metric
Diameter Range¼"-4" (M6-M100)
Tensile Strength60 ksi (414 MPa) min
Yield Strength36 ksi (248 MPa) min
HardnessMax 100 HRB
? All rods supplied with full traceability and test certification. Custom cut lengths available.

Complete the Fastener Set

Other ASTM A307 Grade A Fastener Products Available from RealBolt

RealBolt also manufactures the complete ASTM A307 Grade A fastener range — ASTM A307 Grade A Bolts, ASTM A307 Grade A Nuts, ASTM A307 Grade A Screws, ASTM A307 Grade A Washers, ASTM A307 Grade A Studs — from certified bar stock per ASTM with full EN 10204 MTC 3.1/3.2 documentation and fast Mumbai dispatch.
ASTM A307 Grade A Bolts
ASTM A307 Grade A Nuts
ASTM A307 Grade A Screws
ASTM A307 Grade A Washers
ASTM A307 Grade A Studs

Technical Data

ASTM A307 Grade A Threaded Rods Dimensions, Sizes & Thread Standards

ASTM A307 Grade A Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per ASME B18.31.3 (inch) and DIN 976-1 (metric). Custom lengths and thread pitches available. Hot-dip galvanized and zinc-plated finishes supplied per ASTM F2329 and ASTM B633.

Threaded Rod Dimensions - Inch & Metric

Nominal SizeThread PitchMajor Dia (mm/in)Standard Lengths (mm/in)
¼"-20 UNC20 tpi6.35 mm1000, 2000, 3000 mm / 36", 72", 120"
?"-16 UNC16 tpi9.53 mm1000, 2000, 3000 mm / 36", 72", 120"
½"-13 UNC13 tpi12.70 mm1000, 2000, 3000 mm / 36", 72", 120"
?"-11 UNC11 tpi15.88 mm1000, 2000, 3000 mm / 36", 72", 120"
¾"-10 UNC10 tpi19.05 mm1000, 2000, 3000 mm / 36", 72", 120"
M61.0 mm6.0 mm1000, 2000, 3000 mm
M101.5 mm10.0 mm1000, 2000, 3000 mm
M162.0 mm16.0 mm1000, 2000, 3000 mm
M202.5 mm20.0 mm1000, 2000, 3000 mm
M243.0 mm24.0 mm1000, 2000, 3000 mm
M303.5 mm30.0 mm1000, 2000, 3000 mm

Dimensional & Material Standards

StandardCoversThread
ASTM A307Carbon steel threaded rodsUNC/UNF
ASME B18.31.3Threaded rods, inchUNC/UNF
DIN 976-1Threaded rods, metricMetric
ISO 898-1Mechanical propertiesMetric
ASTM F2329Hot-dip galvanizingAll
ASTM B633Zinc platingAll
Material StandardRequirement
ASTM A307Low carbon steel, Grade A
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A307 Grade A Threaded Rod Chemical Composition

ASTM A307 Grade A Threaded Rods are manufactured from chromium-molybdenum alloy steel with Cr (0.8–1.1%), Mo (0.15–0.65%), and vanadium additions in B16 grades, controlled per ASTM and ASME SA-193. Cr-Mo additions raise hardenability and creep rupture strength for pressure vessel service; vanadium in B16 extends the allowable service temperature to 538°C.

Chemical Composition per ASTM A307

ElementComposition (%)
Carbon (C)0.26% max
Manganese (Mn)0.60% max
Phosphorus (P)0.04% max
Sulfur (S)0.15% max
Iron (Fe)Balance
? All heats verified by spectrometry. Material test certificates supplied with every order.

Why ASTM A307 Grade A Alloy Composition Matters for Threaded Rods

Low Carbon Content — Weldability & Ductility
The low carbon content (=0.26%) ensures ASTM A307 Grade A threaded rods are easily weldable and provide good ductility, making them suitable for fabrication and on-site adjustments.
Manganese — Strength & Toughness
Manganese up to 0.60% improves the strength and toughness of the rods, supporting reliable performance in structural and bracing applications.
Phosphorus & Sulfur Control — Prevents Brittleness
Strict limits on phosphorus and sulfur prevent embrittlement, ensuring the rods maintain integrity during installation and service.

Fastener Performance

ASTM A307 Grade A Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A307 Grade A Threaded Rods per ASTM. ASTM A307 Grade A threaded rods achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Rod SizeRecommended Torque (Nm)Clamp Load (kN)
¼"-20 UNC86
?"-16 UNC2714
½"-13 UNC6823
?"-11 UNC13536
¾"-10 UNC24054
M104015
M1616038
M2032060
?? Note: Torque values are for plain finish rods with standard nuts. Lubrication reduces required torque by up to 20%.

Industry Applications

ASTM A307 Grade A Threaded Rods Applications — Industries & End Uses

ASTM A307 Grade A Threaded Rods from RealBolt are specified across oil and gas pressure vessels, power generation, and petrochemical where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Building Construction – Anchoring & Bracing
HVAC & Electrical Supports
Light Industrial Machinery
Infrastructure & Utilities

ASTM A307 Grade A Threaded Rods Standards & International Certifications

ASTM A307 Grade A Threaded Rods from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, hardness test certificate, dimensional inspection report, and proof load test records — available on request for all orders.
Standards
DIN 975 DIN 976-1 ASME B18.31.2 IS 1367 IS 1364 SAE J429
Certifications
DIN 976-1EN 10025-2

Buy ASTM A307 Grade A Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A307 Grade A Threaded Rods — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
022-6743-7972
+91 90226 36025
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Answers for Buyers

ASTM A307 Grade A Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about ASTM A307 Grade A Threaded Rods from RealBolt — covering ASTM A193 grade, proof load, creep ratings, cryogenic L7 limits, coating options, and EN 10204 documentation. Contact our technical team directly for project-specific guidance on ASTM A307 Grade A threaded rods selection and pricing.
  • Free technical consultation
  • Mill Test Certificate included
  • Export packaging & documentation
  • Sample orders welcome
  • Rapid quotation turnaround
  • Bulk pricing for projects
  • Corrosion protection advice
  • Dedicated customer support
ASTM A307 Grade A threaded rods are available with Unified National Coarse (UNC), Unified National Fine (UNF), and ISO metric threads. Inch threads conform to ASME B1.1, while metric threads follow DIN 13 or ISO 261. Custom thread pitches and left-hand threads can be supplied on request.
Yes, ASTM A307 Grade A threaded rods can be supplied with hot-dip galvanized (HDG) coating per ASTM F2329 for enhanced corrosion resistance. HDG rods are recommended for outdoor, marine, and concrete embedment applications. Always use compatible HDG nuts and washers for proper fit and corrosion protection.
Yes, due to their low carbon content, ASTM A307 Grade A threaded rods are readily weldable using standard welding techniques. Ensure surfaces are clean and free of coatings (such as zinc or HDG) before welding to avoid hazardous fumes and ensure strong welds.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
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  • Norway
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  • Turkey
  • UAE
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  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
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