+912267437972

+919022636025

enquiry@real-bolt.com

Contact Us

ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series – Manufacturer, Exporter & Supplier

We manufacture and export ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series conforming to exact ASME B18.3 dimensional and mechanical specifications. Available in Alloy Steel (Grade 12.9 equiv.) / 18-8 SS / 316 SS, our ASME B18.3 socket screw (inch)s pass rigorous in-house testing — hardness, tensile and dimensional — before dispatch. ISO 9001:2015 certified production, EN 10204 3.1 mill test reports supplied as standard, and dedicated export documentation for 50+ destination countries.
Request a Quote
View Standards

ASME B18.3 Key Specifications

The core specification data for ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series, at a glance.

Standard

ASME B18.3

Type

Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series

Size Range

0-80 UNF to 4-8 UNC

Thread Pitch

UNC & UNF

Property Class / Grade

Alloy Steel (Grade 12.9 equiv.) / 18-8 SS / 316 SS

Head / Drive Type

Hex Socket / Cylindrical Head

About ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series

ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are socket screw (inch)s produced and tested to the exact requirements of the ASME B18.3 specification. Featuring a Hex Socket / Cylindrical Head configuration with UNC & UNF thread form, they are available in property classes Alloy Steel (Grade 12.9 equiv.) / 18-8 SS / 316 SS across a size range of 0-80 UNF to 4-8 UNC. The ASME B18.3 standard governs dimensional tolerances, mechanical properties including tensile strength, proof load and hardness, as well as surface finish requirements to ensure dependable performance in Oil & Gas and Aerospace applications worldwide.
Our ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are cold-forged from certified bar stock, heat-treated where required, and thread-rolled to guarantee consistent fit and fatigue performance. Every batch is documented with an EN 10204 3.1 Mill Test Report covering chemical composition, mechanical test results and dimensional inspection. Available in zinc electroplated, hot-dip galvanised, Geomet, Dacromet and black oxide finishes to match corrosion-resistance requirements for Hydraulics, Precision Machinery and USA Defence applications. As a global exporter of ASME B18.3 fasteners, we consolidate orders with other standard-specification items into single shipments, backed by complete customs documentation for over 50 countries.
Technical Specifications

Raw Material

Alloy Steel (Grade 12.9 equiv.) Alloy / Stainless Steel

Country of Origin

India

Standard Body

ASME

Corrosion Resistance

Salt-spray tested to relevant grade

Recommended Torque

Per property class / grade

Storage Conditions

Dry, corrosion-inhibited packing

ASME B18.3 Dimensions & Size Chart

Precise dimensional data for every ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series size, cross-referenced against the standard’s key measurement points.
Size (in)dk (in)k (in)s (in)L Range (in)
#10-240.6000.2505/321/4–4
1/4″0.7500.2503/161/4–6
5/16″0.9370.3121/45/16–6
3/8″1.1250.3755/163/8–6
1/2″1.5000.5003/81/2–6
5/8″1.8750.6251/25/8–6
3/4″2.2500.7505/83/4–6
1″3.0001.0003/41–6
Key Dimension Callouts

D

Nominal screw diameter measured across the unthreaded body.

L

Overall screw length measured from bearing surface to end.

A

Head diameter measured across the cylindrical socket head.

J

Hex socket size measured across opposite flats.

Browse Related ASME Fastener Standards and Engineering Dimensions

Additional ASME fastener standards cover bolts, screws, nuts, washers, stud bolts, threaded rods and other industrial fasteners with defined dimensions, tolerances, thread specifications, mechanical properties and material grades. Compare related engineering specifications and manufacturing standards to verify quality requirements and select the correct design standard for demanding industrial applications.
ASME B18.2.1
ASME B18.2.2
ASME B18.6.3
ASME B18.21.1
ASME B18.31.2

ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series – Material Grades & Property Classes

ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are available across multiple property classes and surface finish options to match load-bearing and corrosion-resistance requirements for Oil & Gas, Aerospace and Hydraulics applications.
Property Classes
Alloy Steel (Grade 12.9 equiv.) 18-8 SS 316 SS
Surface Treatments
Zinc Electroplated Hot-Dip Galvanised (HDG) Geomet Coating Dacromet Coating Black Oxide Phosphate & Oil Plain (Self Colour) Nickel Plated

Why Choose Us for ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series?

Nine reasons buyers worldwide rely on us as their ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series manufacturer and export partner.
ISO Certified Production

Every batch of ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series is manufactured under an ISO 9001:2015 certified quality management system with full in-process control.

EN 10204 3.1 MTR Supplied

A mill test report covering chemical composition, tensile, hardness and dimensional inspection accompanies every ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series shipment.

48-hr Dispatch on Stock Items

Commonly stocked ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series sizes leave our warehouse within 48 hours of order confirmation, minimising your downtime.

Export to 50+ Countries

Established freight and customs partners ensure reliable delivery of ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series to buyers in over 50 countries worldwide.

Custom Sizes & Lengths

Non-standard ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series lengths, diameters and special thread pitches are produced to order to match your drawing requirements.

Competitive Factory Pricing

Direct-from-factory pricing on ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series with no middleman markup, offering the best value on volume and repeat orders.

In-House Metallurgical Testing

Hardness, tensile strength and dimensional checks for ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are performed in our in-house laboratory before every release.

Consolidated Multi-Standard Shipping

Combine ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series with other standard-specification fasteners into a single container shipment to reduce freight costs.

Dedicated Export Documentation Team

Our specialist team prepares all customs, compliance and shipping paperwork for every ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series export order.

ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series – Applications & End Uses

ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are widely specified across multiple industries. Select an industry below to see how our ASME B18.3 socket screw (inch)s are applied.
ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are used in oil & gas for critical fastening applications where dimensional accuracy and mechanical performance are essential. Grade Alloy Steel (Grade 12.9 equiv.) is most commonly specified for oil & gas environments.
In aerospace, ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are valued for consistent dimensions and reliable load-bearing capability. We supply with full test documentation to support quality audits and project inspections.
ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are used in hydraulics assemblies where precise torque control and consistent fit are critical. We supply to OEM manufacturers and contractors with custom packaging formats.
For precision machinery applications, ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are supplied with material test reports, dimensional inspection certificates and PPAP documentation where required.
ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series for usa defence use are selected from stainless steel or coated grades to provide appropriate corrosion resistance while maintaining specified mechanical performance.
In general engineering applications, ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are fastened into assemblies requiring long-term reliability. Our export-packaged ASME B18.3 socket screw (inch)s arrive protected from transit corrosion with full documentation.

Request a Quote for ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series

Get pricing and lead times for your required sizes and quantities. ISO 9001 certified. EN 10204 3.1 MTR supplied. Export to 50+ countries.
022-6743-7972
+91 90226 36025
Email Us

Frequently Asked Questions About ASME B18.3

Common questions from buyers sourcing ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series, covering sizes, grades, documentation and lead times.
We supply ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series from 0-80 UNF to 4-8 UNC in UNC & UNF thread. Standard lengths are stocked; non-standard lengths are produced to order. Contact us with your exact requirements for availability confirmation.
ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series are supplied in Alloy Steel (Grade 12.9 equiv.) / 18-8 SS / 316 SS. Carbon and alloy steel grades comply with ISO 898-1 and stainless steel grades comply with ISO 3506. ASTM grades are available for USA and Canadian export orders.
Every ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series order includes an EN 10204 3.1 Mill Test Report covering chemical composition, tensile strength, hardness and proof load. Third-party inspection by SGS, BV or TUV can be arranged on request.
Stocked ASME B18.3 Socket Head Cap Screws, Set Screws and Hex Keys – Inch Series sizes dispatch within 48 hours of order confirmation. Custom lengths, special grades or surface finishes typically ship within 2-3 weeks. Contact us for a specific lead time on your required size and quantity.

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
  • Canada
  • Mexico
  • Germany
  • UK
  • France
  • Italy
  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
  • New Zealand
  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
  • Vietnam
  • South Korea
  • Japan
  • Brazil