Industrial Fasteners Manufacturer & Global Exporter

Certified Industrial Fasteners Manufacturer in India

Neelkamal Alloys LLP is a globally recognized manufacturer, stockist, and exporter of high-integrity industrial fasteners, including heavy hex bolts, stud bolts, hex nuts, socket cap screws, washers, rivets, and customized machined components. Engineered to perform in extreme temperatures, high pressure, and highly corrosive chemical environments, our products serve critical industries worldwide such as Oil & Gas, Petrochemicals, Power Generation, Offshore Marine, and EPC Infrastructure Projects.

Our state-of-the-art manufacturing facilities in Mumbai leverage advanced thread-rolling, cold forging, CNC machining, and heat treatment operations. Every production batch is processed under strict compliance with ASTM, ASME, DIN, ISO, and BS engineering specifications to guarantee mechanical durability, precise pitch tolerances, and maximum shear/tensile strength.

Precision Machining to ASME B18.2.1 / DIN 931 Standards
Heat-Number Material Traceability from Mill to Dispatch
Complete EN 10204 3.1 Mill Test Certificates Provided
Specialized High-Alloy & Corrosion-Resistant Grades
Non-Destructive Testing (NDT) & PMI Verification
Seaworthy Packaging for Safe International Freight

Complete Industrial Fastener Product Portfolio

We produce an extensive range of standard and drawing-based fasteners tailored to technical project procurement requirements:

Industrial Bolts

Hex bolts, heavy hex bolts, Allen socket head bolts, U-bolts, L-shaped foundation bolts, eye bolts, carriage bolts, and shoulder stripper bolts available in metric and imperial dimensions.

Flange Stud Bolts

Continuous thread stud bolts, double-end stud bolts, and tap-end studs engineered specifically for high-pressure ASME B16.5 pipe flange joints and pressure vessels.

Heavy Hex Nuts

Heavy hex nuts, thin nuts, lock nuts, nylon insert nuts, castle nuts, and flange nuts threaded to standard UNC, UNF, and metric coarse/fine profiles.

Precision Screws

Socket head cap screws, countersunk screws, machine screws, set screws, self-tapping screws, and customized drive mechanisms for specialized machinery.

Industrial Washers

Plain flat washers, spring lock washers, heavy-duty spherical washers, Belleville washers, and square plate washers for uniform load distribution.

Specialized Hardware

Structural shear studs, shank lifting hooks, heavy wire rope clamps, precision dowel pins, and tie-rod assemblies manufactured to client engineering drawings.

Material Grades & International Specifications

To withstand aggressive atmospheric conditions, marine splash zones, and high-acid environments, Neelkamal Alloys LLP manufactures fasteners in a wide spectrum of certified metallurgical grades:

Material Category	Popular Material Grades	Key ASTM / ASME Standards	Primary Applications
Stainless Steel	SS 304, 304L, 316, 316L, 310, 321, 347, 904L	ASTM A193 B8 / B8M, ASTM A194 Gr 8 / 8M, ASTM A320	Chemical process, food processing, water treatment, general piping.
Duplex & Super Duplex	UNS S31803, S32205 (2205), S32750 (2507), S32760	ASTM A276, ASTM A479, ASTM A182 F51 / F53 / F55	Desalination plants, offshore platforms, subsea structures.
Inconel Alloys	Inconel 600, Inconel 601, Inconel 625, Inconel 718	ASTM B166, ASTM B446, ASTM B637	Gas turbines, aerospace components, heat exchanger units.
Hastelloy Alloys	Hastelloy C276, Hastelloy C22, Hastelloy B2	ASTM B574, ASTM B575	Flue gas scrubbers, aggressive organic/inorganic acid processing.
Titanium Alloys	Titanium Grade 2 (UNS R50400), Grade 5 (Ti-6Al-4V)	ASTM B348, ASTM F467, ASTM F468	Marine equipment, weight-sensitive aerospace structures.
Coated Fasteners	Xylan PTFE Coated, Cadmium Plated, Zinc Nickel	ASTM A193 B7 / B8M with Fluoropolymer Coating	Subsea oilfields, offshore drilling platforms, splash zone piping.

Quality Control & Testing Methodology

Our commitment to zero-defect manufacturing ensures every fastener complies fully with customer quality plans and international regulatory codes. Every production lot undergoes rigorous inspection prior to dispatch:

1. Positive Material Identification (PMI)

Handheld XRF spectro-analysis confirms 100% alloy element breakdown against mill test reports before machining begins.

2. Mechanical Property Testing

Tensile strength, proof load, yield strength, elongation, impact testing (Charpy V-Notch), and Rockwell/Brinell hardness verification.

3. Thread & Dimensional Inspection

Go/No-Go thread pitch gauges, optical shadow calibrators, and micro-calipers ensure strict compliance with ASME/DIN limits.

4. Third-Party Inspection (TPI)

We welcome client-appointed inspection agencies such as TUV, Bureau Veritas, SGS, DNV, and Lloyd's Register.

Global Export Footprint & Supply Network

With an established export logistics network operating out of Mumbai port, Neelkamal Alloys LLP supplies certified fasteners to engineering contractors, stocking distributors, and plant owners across 105+ countries.

Middle East & Africa: United Arab Emirates (Dubai, Abu Dhabi), Saudi Arabia (Riyadh, Jubail), Qatar, Kuwait, Oman, Bahrain, Egypt, Nigeria, South Africa.

Europe & Americas: United Kingdom, Germany, France, Italy, Netherlands, Spain, United States, Canada, Brazil, Mexico, Chile.

Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, Australia, South Korea, Japan.

Key Supply Centers in India: Mumbai, Pune, Ahmedabad, Surat, Vadodara, Delhi NCR, Chennai, Bengaluru, Hyderabad, Kolkata, Visakhapatnam, Coimbatore, Rajkot, Nagpur.

Frequently Asked Questions (FAQ)

What industrial standards do your fasteners comply with?

Our fasteners are manufactured strictly to international standards including ASTM A193 (B8, B8M, B7), ASTM A194 (Gr 8, 8M, 2H), ASTM A320, ASME B18.2.1, ASME B18.2.2, DIN 931, DIN 933, DIN 934, and ISO standards.

Do you provide EN 10204 3.1 Mill Test Certificates with shipments?

Yes. All export orders are dispatched with comprehensive EN 10204 3.1 Mill Test Certificates detailing chemical analysis, mechanical property testing, heat number traceability, and non-destructive examination results.

Which high-performance materials do you specialize in?

We specialize in stainless steel (304/304L, 316/316L, 310, 321, 347), Duplex & Super Duplex Steel (2205, 2507), Inconel (600, 625, 718), Hastelloy (C276, C22), Titanium (Grade 2, Grade 5), and Alloy 20.

Can custom dimensions or drawing-based orders be produced?

Yes. Our CNC machining and forging facilities allow us to produce custom non-standard fasteners, specialized thread pitches, non-standard lengths, and custom surface coatings like Xylan PTFE.

Industrial Fasteners Manufacturer & Supplier