Bolts
Hex, heavy hex, Allen, U, eye and foundation bolts machined for maximum tensile strength and secure, long-life joints.
- Sizes M3 – M100 & 1/4" – 4"
- ASME B18.2.1 / DIN 931 / DIN 933
Manufacturer & Exporter · Mumbai, India
Leading Fasteners Manufacturer for Critical Industries
Bolts, stud bolts and nuts in stainless, duplex and nickel alloys — built to ASTM & ASME standards.
Exotic Alloy Specialists
Inconel, Hastelloy & Titanium Fasteners
Engineered for high temperature, high pressure and aggressive corrosion.
Trusted in 105+ Countries
Export-Ready Supply for Global Projects
Traceable materials, MTC documentation and on-time delivery worldwide.
Nuts
Hex, heavy hex, thin, lock and flange nuts precision-threaded to pair perfectly with our bolts and stud bolts.
- ASTM A194 Gr 8 / 8M / 2H
- ASME B18.2.2 / DIN 934 / ISO 4032
Screws
Machine, socket head cap, set and self-tapping screws with exceptional holding power for equipment and assemblies.
- Socket, Phillips & slotted drives
- DIN 912 / ISO 4762 / ASME B18.3
350+Global Projects
Supplied
Supplied
About Neelkamal Alloys LLP
Fastener Expertise Trusted by EPC Contractors & Plant Owners
Neelkamal Alloys LLP is a Mumbai-based manufacturer, stockist and exporter of bolts, stud bolts, nuts, screws, washers and special fasteners. Our range is produced from stainless steel, duplex and super duplex steel, nickel alloys, Inconel, Hastelloy, titanium and Alloy 20 — the materials specified when standard carbon steel fails.
Every order is controlled from raw material to dispatch: heat-number traceability, dimensional checks to ASME, DIN and ISO standards, and EN 10204 3.1 mill test certificates, so procurement teams receive fasteners that pass inspection the first time.
"As an engineering partner to construction, automotive, aerospace and process industries, we continually refine our products so every joint performs under real operating conditions."
- Heat-number material traceability
- Standard & drawing-based production
- Third-party inspection on request
- Seaworthy export packaging
Proven Global Supply Record
Figures built on repeat orders from buyers across the Middle East, Europe, Africa and Asia.
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Worldwide Projects
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Satisfied Clients
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Countries Covered
Our Products
High-Performance Alloy Fasteners
A comprehensive range of corrosion-resistant and high-temperature fasteners, selected by material to match your service environment.
Stainless Steel Fasteners
SS 304, 304L, 316, 316L, 310, 321 & 347 — ASTM A193 B8 / B8M, A194 Gr 8 / 8M.
Details
Duplex Steel Fasteners
Duplex 2205 (UNS S31803 / S32205) & super duplex S32750 / S32760 for chloride service.
Details
Inconel Fasteners
Inconel 600, 601, 625 & 718 for extreme heat, oxidation and high-pressure duty.
Details
Titanium Fasteners
Titanium Gr 2 & Gr 5 (Ti-6Al-4V) — lightweight strength for marine & aerospace.
Details Buyer's Specification Guide
Material Grades, Standards & Typical Service
A quick reference for procurement and piping engineers comparing fastener alloys before issuing an RFQ.
| Material | Common Grades / UNS | Key Specifications | Typical Service |
|---|---|---|---|
| Stainless Steel | 304 / 304L / 316 / 316L / 321 / 347 | ASTM A193 B8, B8M; A194 Gr 8, 8M; A320 B8 | General corrosion, food, water, chemical plant |
| Duplex & Super Duplex | S31803 / S32205 / S32750 / S32760 | ASTM A276, A479, A182 F51 / F53 / F55 | Offshore, seawater, desalination |
| Inconel | 600 (N06600) / 625 (N06625) / 718 (N07718) | ASTM B166, B446, B637 | High temperature, turbines, heat exchangers |
| Hastelloy | C276 (N10276) / C22 (N06022) | ASTM B574 | Strong acids, chlorine, pollution control |
| Nickel Alloy | Monel 400 (N04400) / K500 (N05500) / Nickel 200 | ASTM B164, B865, B160 | Marine hardware, hydrofluoric acid |
| Titanium | Gr 2 (R50400) / Gr 5 (R56400) | ASTM B348, F467, F468 | Aerospace, marine, weight-critical assemblies |
| Alloy 20 | UNS N08020 | ASTM B473 | Sulfuric acid handling, pickling equipment |
01
Material Verification
Raw bar is checked against the mill certificate and heat number before any machining begins.
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Precision Manufacturing
Forging, machining and thread rolling to ASME, DIN, ISO dimensions or customer drawings.
03
Inspection & Testing
Dimensional, thread gauge, hardness and PMI checks, with third-party inspection when required.
04
Export Documentation
EN 10204 3.1 MTCs, packing lists and seaworthy packaging for smooth customs clearance.
Testimonials
What International Buyers Say
Feedback from project managers and directors who rely on our fasteners for demanding industrial work.
Neelkamal Alloys LLP provides excellent products and services. Their custom fasteners have been a perfect fit for our specialized machinery needs. The team is highly responsive and always ready to accommodate our specific requirements.
We have been sourcing fasteners from Neelkamal Alloys LLP for our industrial projects in the UAE. Their commitment to quality and timely delivery is unmatched. The durability of their screws and washers has contributed significantly to our project success.
Partnering with Neelkamal Alloys LLP has been a game-changer for our infrastructure projects. Their fasteners are robust and reliable, and their support team is incredibly knowledgeable. We look forward to continuing our partnership.
Application Industries
Fasteners Built for Demanding Sectors
From pressure-rated flange joints to structural steelwork, our fasteners are specified where failure is not an option.
Oil & Gas
Stud bolts and heavy hex nuts for flanges, wellheads and offshore platforms.
Petrochemical
Nickel alloy and duplex fasteners for reactors, columns and process piping.
Refineries
High-temperature bolting for heat exchangers, furnaces and pressure vessels.
Chemical
Hastelloy and Alloy 20 fasteners resistant to acids and aggressive media.
Construction
Foundation, anchor and structural bolts for buildings, bridges and infrastructure.
Fertilizers
Corrosion-resistant stainless bolting for ammonia and urea plant equipment.
Buyer FAQs
Answers for Procurement Teams
Common questions from importers, distributors and EPC buyers evaluating a fastener supplier in India.
Talk to Our Sales TeamWhat types of fasteners does Neelkamal Alloys LLP manufacture?
We manufacture and supply hex bolts, stud bolts, nuts, screws, washers, rivets and special drawing-based fasteners in stainless steel, duplex and super duplex steel, nickel alloys, Inconel, Hastelloy, titanium and Alloy 20.
Which international standards do your fasteners conform to?
Fasteners can be produced to ASTM A193, A194, A320, B348 and related material specifications, with dimensions to ASME B18.2.1, ASME B18.2.2, DIN and ISO standards, or to customer drawings.
Do you provide mill test certificates with export orders?
Yes. Export shipments can be supplied with mill test certificates as per EN 10204 3.1, and third-party inspection can be arranged on request as per the buyer's quality plan.
Which countries does Neelkamal Alloys LLP export to?
We have supplied fasteners for 350+ projects across 105+ countries, including the UAE, Saudi Arabia, the United Kingdom and other markets in the Middle East, Europe, Africa and Asia.
Can you manufacture custom or non-standard fasteners?
Yes. We produce custom fasteners to client drawings, special thread forms, lengths and coatings such as PTFE, for specialized machinery, offshore and process plant applications.
Our Partner Brands
Collaborating with Respected Industry Names
We work alongside established brands to ensure our clients receive consistently high-quality products.
Need Fasteners for Your Next Project?
Share your size, grade and quantity — our engineers respond with technical guidance and lead times.