Email:
[email protected]
Phone:
+91 93135 43530
Address:
133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
Industrial Fasteners Supplier India — Krishna Industries (KELOR), Ahmedabad
Complete range of stainless steel fasteners — SS304 (A2) · SS316 (A4) · Duplex · Nickel Alloy — Hex Bolts · Carriage Bolts · Nuts (all types) · Screws (all types) · U Bolts · Threaded Rods · Washers · Wire Nails · Wedge Lock Washers — DIN / ISO / JIS / ASME / ASTM / IS / BSW standards.
B2B Supplier Since 2017 · GSTIN: 24AKLPP6499B1ZT · IEC: AKLPP6499B · MTC Available · Pan India Dispatch · 2-Hour Quote on WhatsApp · MOQ from 10 Nos
Krishna Industries, trading as KELOR, is a B2B industrial fastener supplier based in Ahmedabad, Gujarat. We supply the complete range of stainless steel fasteners — from M2.5 machine screws to M36 threaded rods, from M3 wire nails to M30 wedge lock washers — to EPC contractors, OEM manufacturers, structural fabricators, marine fitout contractors, food and pharmaceutical plant engineers, and MRO stores across India.
Every product is supplied with a GST invoice. Material Test Certificates (MTC) available on request. Pan India dispatch from Ahmedabad within 2–15 working days depending on product and quantity. All standard DIN, ISO, ASTM, and IS specifications maintained.
Complete Stainless Steel Fastener Range — Browse by Product
Click any product card to go to the full specification page with dimension tables, grade selection guides, DIN standards, and pricing information.
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Stainless Steel Bolts
Hex · Carriage · Socket Cap · Hex Flange · Lag · T-Bolt
- Hex Bolt — DIN 931 (partial) / DIN 933 (full thread)
- Carriage Bolt — DIN 603 (tamper-resistant timber)
- Socket Cap — DIN 912 · Socket Thin DIN 7984
- Hex Flange — DIN 6921 · Lag Bolt DIN 571
- T-Bolt — DIN 787 (Unistrut / channel frame)
- M3 to M20 · 6 mm to 200 mm · A2-70 · A4-80
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Stainless Steel Nuts
Hex · Nylock · Flange · Dome · Square · Anti-Theft
- Hex Nut — DIN 934 / ISO 4032
- Nylock Nut — DIN 985 (vibration resistant)
- Hex Lock Nut — DIN 980 (all-metal, high temp)
- Flange Nut — DIN 6923 (no separate washer)
- Dome / Cap Nut — DIN 1587
- M3 to M16 · 1/8″ to 5/8″ · A2-70 · A4-80
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Stainless Steel Screws
Socket · CSK · Self-Tapping · Machine · Self-Drilling · Rivets
- Socket Cap — DIN 912 · CSK Socket — DIN 7991
- Self-Tapping — DIN 7982 (pre-drilled hole)
- Self-Drilling — DIN 7504 (SS410 drill point)
- Machine Screw — DIN 965 (tapped holes)
- All head types: Pan · CSK · Truss · Bugle · Hex Flange
- M2.5 to M6 · 6 mm to 150 mm · All drive types
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SS U Bolts & Square U Bolts
Round Bend · Square Bend · Pipe Clamps · Structural
- Round U Bolt — clamps circular pipes / tubes
- Square U Bolt — clamps square / rectangular sections
- M6 to M20 · 1/4″ to 3/4″ thread
- Inside bend: 12 mm to 305 mm (matches pipe OD)
- DIN 3570 / ISO / ASTM F3125 / IS 1367
- Piping · Automotive · Marine · Structural
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SS Threaded Rods & Studs
All-Thread · Metric · Imperial · Coarse · Fine · Cut-to-Length
- Fully threaded all-thread rod — DIN 975
- Stud bolt — DIN 976 (threaded both ends)
- M2.5 to M36 · 1/4″ to 1½”
- Stock lengths: 1m, 2m, 3m, 6m / 3ft, 6ft, 12ft
- Cut-to-length service — from 50 mm
- SS310 available for high-temperature furnace use
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Stainless Steel Washers
Plain · Spring · Nord-Lock Style · Conical · Fender
- Plain Flat Washer — DIN 125 / ISO 7089
- Spring Lock Washer — DIN 127
- Nord-Lock Style — see Wedge Lock Washer page
- Conical Belleville — DIN 6796
- Fender Washer — DIN 9021 (large OD)
- M3 to M56 · A2 / A4
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Wedge Lock Washers
Indian Make · Nord-Lock Equivalent · M3–M27 · SS304 SS316
- Cam lock principle — outperforms spring washers in Junker test
- Vibration-proof bolt locking — rail, wind, marine, machinery
- SS304 / SS316 / Dakro style (zinc-flake coated)
- Models KL3SP to KL27SS — matched pairs
- 30–50% lower price vs imported European equivalents
- Indian-made · GST invoice · Ready stock M8–M24
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Stainless Steel & Copper Wire Nails
Decking · Roofing · Lost Head · Bullet Head · Self-Drilling
- Decking Nails — SS316, ring shank (ACQ treated timber)
- Roofing Clout — SS316 / Copper (slate, copper sheet)
- Lost Head — SS304 (joinery, flooring, skirting)
- Bullet Head — general construction
- DIA 1.6–6.0 mm · Length 20–150 mm & 1″–6″
- DIN / ISO / JIS / ASTM / IS / BSW
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Stud Bolts
ASME B16.5 · A193 B7 / B7M · Both Ends Threaded
- Threaded both ends, plain shank centre — not all-thread
- For ASME B16.5 pressure flanges — never substitute all-thread
- SS316 A4-80 for corrosive service flanges
- Duplex / Monel for offshore and chemical acid flanges
- Available with matching 2H heavy hex nuts
- MTC and dimensional reports for EPC documentation
Stainless Steel Grades — Quick Selection Guide
All KELOR fasteners are supplied in the following standard grades. Select the correct grade before ordering — wrong grade selection is the most common cause of premature fastener failure in Indian industrial applications.
SS304
A2 · AISI 304 · DIN 1.430118% Cr + 8% Ni. General indoor and non-chloride corrosion resistance. Most economical SS grade. Specify for HVAC, food non-GMP, general engineering, non-coastal structural.
SS316
A4 · AISI 316 · DIN 1.440118% Cr + 10% Ni + 2–3% Mo. Chloride pitting resistance. Specify for marine, coastal, seawater, offshore, ACQ timber, swimming pools, chemical plant, food GMP, pharma.
Duplex 2205
UNS S32205 · DIN 1.4462Dual-phase high strength + chloride resistance. Specify for offshore structural, desalination, seawater injection under high load. Available across all product types on request.
Nickel Alloy
Monel 400 · Alloy 600 · 625Extreme corrosion — seawater, acids, alkalis. For chemical process acid flanges, seawater submerged structural connections, offshore platform splash zone.
Complete Fastener Range — Specifications at a Glance
| Product | Types | Size Range | Standard | MOQ | Page |
|---|---|---|---|---|---|
| Hex Bolts | DIN 933 Full Thread · DIN 931 Partial · Carriage · Flange · Lag · T-Bolt · Socket Cap · Socket Thin · Socket Low | M3–M20 / 1/8″–3/4″ | DIN / ISO / ASME / IS | 50 Nos | → Bolts |
| Nuts | Hex · Hex Lock · Hex Thick · Nylock · Low Nylock · Flange · Dome · Square · Anti-Theft | M3–M16 / 1/8″–5/8″ | DIN / ISO / ASME / IS | 100 Nos | → Nuts |
| Screws | Socket Cap · CSK Socket · Button Head · Self-Tapping · Machine · Self-Drilling · Blind Rivets | M2.5–M6 / #6–#14 | DIN / ISO / ASME / IS | 100 Nos | → Screws |
| U Bolts | Round Bend (pipe) · Square Bend (structural) | M6–M20 / 1/4″–3/4″ | DIN 3570 / ISO / ASTM | 100 Nos | → U Bolts |
| Threaded Rods | All-Thread (DIN 975) · Stud Bolt (DIN 976) · Cut-to-Length | M2.5–M36 / 1/4″–1½” | DIN / ISO / ASTM / IS | 10 Rods | → Threaded Rods |
| Washers | Plain Flat · Spring Lock · Conical · Fender · Square | M3–M56 | DIN 125 / 127 / ISO | 100 Nos | → Washers |
| Wedge Lock Washers | SS304 Style · SS316 Style · Dakro Style (zinc-flake) — Indian Make | M3–M27 (KL3SP–KL27SS) | Junker DIN 65151 | 100 Pairs | → Wedge Lock |
| Wire Nails | Decking · Roofing / Clout · Lost Head · Bullet Head · Rivets · Copper | DIA 1.6–6 mm / 20–150 mm | DIN / ISO / IS / ASTM | 100 Nos | → Wire Nails |
Standards We Supply To
Every KELOR fastener is supplied to at least one of the following internationally recognised standards. Specify the required standard on your purchase order — if multiple standards apply, the more stringent takes precedence.
| Standard Body | Key Fastener Standards | Best Known For |
|---|---|---|
| DIN | DIN 931, 933, 912, 976, 975, 985, 934, 6921, 603, 571, 127, 125, 7991, 7982, 7504, 6923, 1587, 3570 | Most widely used in Indian industrial procurement — default for most fastener specifications |
| ISO | ISO 4014, 4017, 4032, 4762, 7042, 4161, 7089, 1051, 724 | International equivalents of DIN standards — used in global EPC and export projects |
| ASME / ASTM | ASME B18.2.1 (hex bolts), B18.2.2 (heavy hex nuts), B18.3 (socket screws), B18.31.3 (threaded rods), ASTM A193 (high-temp bolting), A194 (nuts), F1554 (anchor rods), F1667 (nails) | US-standard EPC and petrochemical projects; pressure flange bolting |
| IS | IS 1367 (fasteners), IS 723 (wire nails), IS 1862 (U bolts) | Government and PSU procurement; domestic Indian project specifications |
| JIS | JIS B 1180 (hex bolts), B 1181 (hex nuts), A 5508 (wire nails) | Japanese OEM, automotive, and joint venture projects |
| BSW / BSP | British Standard Whitworth / Pipe thread | Older plant retrofit, legacy equipment, some export markets |
Industries & Applications
🏗️ EPC & Infrastructure
Bulk fastener supply for government tenders, road, rail, and industrial estate projects. Complete documentation — MTC, test certs, GST invoice with E-Way bill.
⛽ Oil, Gas & Petrochemical
SS316 and Duplex bolts, stud bolts, nuts, and washers for process plant flanges, structural connections, and offshore platform maintenance.
💧 Water Treatment & Municipal
SS304 and SS316 fasteners for WTP pump flanges, filter structures, sluice gates, and all wet utility applications.
🍽️ Food & Pharmaceutical
SS316 A4-80 fasteners with smooth polished heads, crevice-free design, and MTC documentation for food GMP and pharma cleanroom compliance.
⚓ Marine & Offshore
Full SS316 fastener sets — bolts, nuts, washers, U bolts, wire nails, and wedge lock washers — for marine vessels, jetties, and offshore structures in seawater spray zones.
❄️ HVAC & Building Services
SS304 hex bolts, screws, U bolts, and threaded rods for HVAC duct hangers, cable tray support, ceiling grid suspension, and building services installations.
⚡ Solar & Renewables
SS316 T-bolts, hex bolts, and wedge lock washers for solar panel racking and wind turbine structural connections — coastal and rooftop installations.
🏭 MRO & Industrial Stores
Reliable fastener supply partner for MRO stores across India — mixed-size orders, short lead times, GST invoice, and consistent stock availability in common sizes.
How to Specify a Fastener Correctly — Quick Reference
A correctly specified fastener order includes 7 elements. Missing any one leads to wrong supply. Use this checklist before sending any fastener inquiry:
| # | Specification Element | Example | Why It Matters |
|---|---|---|---|
| 1 | Product Type | Hex bolt · Nylock nut · Self-drilling screw · U bolt | Defines the fastener category — wrong type means wrong product |
| 2 | Material Grade | SS304 (A2) · SS316 (A4) · Duplex 2205 | Determines corrosion resistance — the most critical selection decision |
| 3 | Thread / Size | M12 · M16 · 1/2″ UNC · #10 gauge | Must match mating thread — metric and imperial are not interchangeable |
| 4 | Length | 50 mm · 100 mm · 3 ft (for rods) | Must suit joint stack-up — too short = insufficient engagement; too long = protrudes unsafely |
| 5 | Standard | DIN 933 · ISO 4017 · ASTM A193 · IS 1367 | Defines dimensional tolerance, mechanical properties, and documentation requirements |
| 6 | Property Class | A2-70 · A4-80 · A4-100 | Defines strength — material grade alone is incomplete; A4-80 ≠ A4-70 in tensile strength |
| 7 | Quantity | 500 Nos · 100 pairs (washers) | Determines pricing tier and stock vs production lead time |
ℹ️ Example of a complete fastener specification:
“M16 × 60mm Hex Bolt, SS316 (A4-80), DIN 933 (fully threaded), 200 Nos — with matching M16 A4-80 DIN 934 hex nuts and M16 DIN 125 plain washers, GST invoice required, delivery: Mumbai”
This specification gives us everything to quote accurately: type, size, grade, length, standard, property class, quantity, accessories, billing requirement, and delivery location.
“M16 × 60mm Hex Bolt, SS316 (A4-80), DIN 933 (fully threaded), 200 Nos — with matching M16 A4-80 DIN 934 hex nuts and M16 DIN 125 plain washers, GST invoice required, delivery: Mumbai”
This specification gives us everything to quote accurately: type, size, grade, length, standard, property class, quantity, accessories, billing requirement, and delivery location.
Why EPC Contractors & MRO Buyers Choose KELOR
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One Supplier — Complete Range
Bolts, nuts, screws, U bolts, threaded rods, washers, wedge lock washers, wire nails — sourced from one supplier on one invoice. Reduces procurement effort and freight cost.
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Full Documentation
GST invoice + E-Way bill on every order. MTC, hydro test certificates, dimensional reports, third-party inspection available for EPC and government tender orders.
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2-Hour Quote
WhatsApp your BOM or inquiry — confirmed price, availability, and delivery timeline within 2 business hours for standard items. No lengthy tender process for catalogue products.
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Pan India Dispatch
Dispatch from Ahmedabad via VRL Logistics, DTDC, and Professional Courier. Standard delivery 3–7 working days to Mumbai, Chennai, Bengaluru, Hyderabad, Delhi, Kolkata.
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Non-Standard & Custom
Anti-galling coated fasteners, cut-to-length threaded rods, non-standard grades (Duplex, Nickel Alloy, SS310), and custom specifications available for OEM and EPC projects.
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GSTIN Verified Since 2017
GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B. All invoices valid for ITC (Input Tax Credit) claims. Consistent reliable supply since 2017.
Pan India Supply Coverage
Krishna Industries dispatches fasteners from Ahmedabad to all major industrial cities: Mumbai, Pune, Nashik, Nagpur, Aurangabad (Maharashtra) · Chennai, Coimbatore, Bengaluru, Hyderabad, Visakhapatnam (South India) · Delhi NCR, Noida, Gurugram, Ludhiana, Jalandhar, Chandigarh (North India) · Kolkata, Bhubaneswar, Jamshedpur, Guwahati (East India) · Jaipur, Indore, Bhopal, Lucknow, Kanpur, Agra (Central India) · Surat, Vadodara, Rajkot, Vapi, Ankleshwar, Gandhinagar (Gujarat) and all other industrial cities. Export supply FOB Mundra / Nhava Sheva on request.
Send Your Fastener Inquiry — Quote in 2 Hours
WhatsApp your BOM, material list, or inquiry with product type · size · grade · quantity · delivery location
📲 WhatsApp Inquiry 📧 Email InquiryFrequently Asked Questions — Industrial Fasteners
What stainless steel fastener grades do you supply?
We supply fasteners in SS304 (A2), SS305, SS316 (A4), SS316L, SS310, SS321 (austenitic), SS409, SS410, SS430 (martensitic and ferritic), and Duplex 2205. Nickel alloy grades (Monel 400, Alloy 600, Alloy 625) are available on request. SS304 and SS316 are standard stock — other grades are on 2–4 weeks lead time. SS304 (A2-70) is specified for general indoor and non-chloride applications. SS316 (A4-80) is the correct specification for marine, coastal, chemical, offshore, food GMP, and pharmaceutical applications where chloride or corrosive media are present.
Can you supply a complete fastener kit — bolts, nuts, and washers together?
Yes. Krishna Industries supplies matched fastener kits — bolt + nut + flat washer + spring washer (or wedge lock washer) in the same SS grade, same standard, on a single GST invoice. This is particularly useful for EPC and construction projects where complete fastener sets per joint are required. Share your joint specification (bolt size, grade, standard, number of joints) and we will quote a complete kit price per set.
What is the minimum order quantity for stainless steel fasteners?
MOQ varies by product: 50 Nos for bolts; 100 Nos for nuts, screws, washers, wire nails, and wedge lock washer pairs; 10 rods for threaded rods. For mixed-size or mixed-type orders on a single project BOM, the total order value takes priority over per-line MOQ — a project order combining 50 M10 bolts + 50 M12 bolts + 100 M10 nuts on one invoice is accepted. For urgent maintenance requirements with quantities below MOQ, contact us — we accommodate genuine project and breakdown situations case by case.
Do you provide Material Test Certificates (MTC) for fasteners?
Yes. MTC confirming the SS grade, chemical composition (Cr, Ni, Mo, C content), mechanical properties (tensile strength, yield strength, hardness), and standard conformance is available on request for all fastener products. MTCs are issued by the manufacturing mill and forwarded with the shipment or sent by email. For EPC project orders requiring specific MTC format (per NACE, per client ITP, or per third-party inspector requirement), advise at time of inquiry. Third-party inspection (TPI) by BVQI, CEIL, TUV, or Lloyds can be arranged for orders above ₹2 lakh in value.
How do I choose between SS304 and SS316 for my application?
SS304 (A2) — 18% chromium, 8% nickel — general corrosion resistance for indoor, non-chloride applications: HVAC, food non-GMP, general engineering, non-coastal structural. SS316 (A4) adds 2–3% molybdenum for chloride pitting resistance. Specify SS316 for: marine, coastal (within ~5 km of sea), seawater-exposed, offshore platforms, ACQ / CA treated timber, swimming pools, chemical plant, food GMP, pharmaceutical cleanrooms, and any application where chloride concentration may exceed ~150 ppm. The 20–30% cost premium for SS316 is consistently justified by the elimination of replacement and maintenance costs in corrosive service. When in doubt for an outdoor application in India, specify SS316 — India’s coastal humidity and monsoonal conditions accelerate SS304 pitting significantly faster than inland Europe.
Can you supply DIN, ISO, ASTM, and IS standards on the same order?
Yes. Mixed-standard orders are common for large project BOMs. A single project may require DIN 933 hex bolts (standard metric supply), ASTM A193 B8 stud bolts (for ASME pressure flanges), and IS 1367 fasteners (for government specification portions). All can be supplied on one order with one GST invoice with each line item calling out the applicable standard. Specify the standard per line item on your purchase order and we confirm compliance before dispatch.