Email:
[email protected]
Phone:
+91 93135 43530
Address:
133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
Hex Bolt supplier in Ahmedabad, Gujarat. Hexagonal head bolt with threaded shank — available in ASTM A193 B6, B7, B7M, L7, L7M, B8, B8M, B8T, B16, SS304, SS316, SS321, A2-50, A4-50, A4-70, Grade 4.6, 8.8, 10.9, 12.9. Metric M10–M72 and…
Hex Bolt | B7 B8M SS304 SS316 Grade 8.8 | Metric Inch | Supplier India
Price on Request
About Company
- KRISHNA INDUSTRIES
- GST No. : 24AKLPP6499B1ZT
- Ahmedabad, Gujarat, India
- Manufacturer, Traders & Wholesale Supplier
- Year of Establishment : Since 1985
- Annual Turnover : Below Rs. 25 Crore Approx.
- Banker : APANI SAHAKARI BANK LIMITED
- Company CEO : Ruchin Panchal
- Constitution of Business : Proprietorship
- Leading Valve Supplier in India covering Maharashtra, Gujarat, Tamil Nadu, Karnataka, Telangana, Delhi NCR, West Bengal, Rajasthan, Madhya Pradesh, Uttar Pradesh, Punjab, Haryana, Andhra Pradesh, Odisha, Chhattisgarh, Jharkhand, Bihar, Kerala, Assam.
- Major Industrial Supply Cities: Ahmedabad, Vadodara, Rajkot, Surat, Mumbai, Pune, Thane, Nashik, Nagpur, Chennai, Coimbatore, Bengaluru, Hyderabad, Delhi, Noida, Gurugram, Faridabad, Kolkata, Jaipur, Indore, Bhopal, Lucknow, Kanpur, Ludhiana, Visakhapatnam.
Description
Hex Bolt Supplier India | B7 B8M SS304 SS316 Grade 8.8 | M10–M72 | ½”–3″ | KELOR
Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Metric: M10–M72 | Inch: ½”–3″
Grades: B6, B7, B7M, L7, L7M, B8, B8M, B8T, B16, SS304, SS316, SS321, A2-50, A4-50, A4-70, 4.6, 8.8, 10.9, 12.9
Introduction – Hex Bolt Supplier India
Krishna Industries (KELOR), based in Ahmedabad, Gujarat, India, is a trusted B2B supplier of Hex Bolts sourced from verified Indian manufacturers. We supply Hex Bolts across all major material grades — ASTM A193 B7, B7M, B8, B8M, B8T, B6, B16, Stainless Steel SS304, SS316, SS321, A2-50, A4-50, A4-70, and commercial grades 4.6, 8.8, 10.9, 12.9 — in Metric sizes M10 to M72 and Inch sizes ½” to 3″ — with Yellow Zinc, Cad Plated, Teflon Blue, Zinc Plated, and Plain Finish coatings.
A Hex Bolt is a fastener with a hexagonal (six-sided) head and a partially or fully threaded shank — tightened using a spanner or socket wrench on the hexagonal head. It is the most widely used bolt type across Indian EPC, structural, industrial equipment, machinery, civil construction, and general engineering applications. Unlike stud bolts which require nuts on both ends, a hex bolt engages from one side — through a clearance hole — and is secured by a nut on the opposite side, or threaded directly into a tapped hole.
Krishna Industries supplies Hex Bolts to EPC contractors, structural steel purchase managers, plant maintenance MRO teams, equipment fabricators, civil construction procurement departments, and bulk fastener buyers across Gujarat and PAN India. All supplies come with GST invoices, Material Test Certificates (MTC), and complete B2B documentation.
Also referred to as: Hexagonal Bolt, Hex Head Bolt, Full Hex Bolt, Machine Bolt, Hex Cap Screw — widely used interchangeably across Indian project BOMs, engineering drawings, and procurement documents.
Hex Bolt vs Stud Bolt — Key Difference for EPC and Industrial Buyers
| Feature | Hex Bolt | Stud Bolt |
|---|---|---|
| Head | ✅ Hexagonal head — spanner / socket wrench | No head — fully threaded rod |
| Tightening | One-sided — head on one end, nut on other | Both ends — two nuts for equal torque |
| Access Needed | Access required only on nut side | Access required on both sides |
| ASME Pipe Flanges | Not standard for ASME B16.5 pressure flanges | ✅ Standard for all ASME pressure pipe flanges |
| Structural Use | ✅ Standard for structural steel, equipment, civil | Not used in structural applications |
| Equipment Bolting | ✅ Machinery, equipment covers, non-pressure joints | Used for pressure-rated flange joints only |
| IS / ASME Standard | IS 1364 / ASME B18.2.1 / DIN 931 / DIN 933 | ASTM A193 / ASME B16.5 |
| Indian EPC BOM | Structural, equipment, civil, non-pressure bolting | Piping flange bolting |
Rule: If your drawing specifies hex bolt or cap screw for structural connections, equipment bolting, or non-pressure joints — order Hex Bolt. If your piping BOM specifies stud bolt for ASME pipe flanges — order Stud Bolt. Krishna Industries supplies both — confirm your requirement and we will ensure correct supply.
Complete Grade and Material Guide — All Available Variants
ASTM A193 High Strength and High Temperature Grades
| Grade | Material | Tensile Strength | Compatible Nut | Best For | Typical Application |
|---|---|---|---|---|---|
| B6 | Martensitic SS 410 | 125 ksi (862 MPa) | A194 Gr 6 | Moderate corrosion + high strength | Equipment bolting, valve covers, moderate chemical |
| B7 | Cr-Mo Alloy Steel (4140/4142) | 125 ksi (862 MPa) | A194 Gr 2H | High strength, high temp — general process | Pressure vessel covers, equipment bolting, industrial flanges |
| B7M | Cr-Mo (controlled hardness) | 105 ksi (724 MPa) | A194 Gr 2HM | Sour gas / H2S — NACE MR0175 | Refinery equipment bolting in H2S environments |
| L7 | Cr-Mo Alloy Steel (low temp) | 125 ksi (862 MPa) | A194 Gr 4 | Low temperature (-73°C) rated | LNG, cryogenic equipment and structural bolting |
| L7M | Cr-Mo (low temp + NACE) | 105 ksi (724 MPa) | A194 Gr 4 / 2HM | Low temp + sour gas combined | Cryogenic sour service offshore equipment |
| B8 | Austenitic SS304 | 75 ksi (517 MPa) | A194 Gr 8 | Corrosion-resistant general service | Chemical equipment, food processing, SS304 assemblies |
| B8M | Austenitic SS316 | 75 ksi (517 MPa) | A194 Gr 8M | Higher corrosion — chloride and chemical | Chemical plant equipment, pharma, coastal industrial |
| B8T | Austenitic SS321 | 75 ksi (517 MPa) | A194 Gr 8T | High temp austenitic, sensitisation resistant | High temp chemical equipment, heat exchangers |
| B16 | Cr-Mo-V Alloy Steel | 150 ksi (1034 MPa) | A194 Gr 7 | Very high temp and pressure | Power plant boiler covers, steam equipment bolting |
Stainless Steel Metric Grades (DIN / ISO)
| Grade | Material | Proof Load | Compatible Nut | Best For | Typical Application |
|---|---|---|---|---|---|
| SS304 / A2-50 | AISI 304 / EN 1.4301 | 500 MPa | A2 hex nut | General corrosion-resistant service | Food equipment, water treatment, general SS bolting |
| SS316 / A4-50 | AISI 316 / EN 1.4401 | 500 MPa | A4 hex nut | Chloride-resistant standard grade | Chemical equipment, coastal, pharma, general SS316 |
| SS316 / A4-70 | AISI 316 / EN 1.4401 | 700 MPa | A4 hex nut | Higher strength SS316 | High-load chemical equipment, offshore, pharmaceutical |
| SS321 | AISI 321 / EN 1.4541 | — | SS321 hex nut | High temp Ti-stabilised | High temp equipment, heat exchanger covers |
Commercial Carbon Steel Grades — Most Common for Structural and Industrial
| Grade | IS Equiv | Tensile Strength | Compatible Nut | Best For | Typical Application |
|---|---|---|---|---|---|
| 4.6 | IS 1364 Gr 4.6 | 400 / 240 MPa | Grade 4 / 5 nut | Low load — light structural and general | Light structural, general construction, non-critical bolting |
| 8.8 | IS 1364 Gr 8.8 | 800 / 640 MPa | Grade 8 nut | Medium-high load — most common structural grade | Structural steel, industrial equipment, machinery frames |
| 10.9 | IS 1364 Gr 10.9 | 1000 / 900 MPa | Grade 10 nut | High load structural and automotive | Heavy structural, bridges, cranes, heavy machinery |
| 12.9 | IS 1364 Gr 12.9 | 1200 / 1080 MPa | Grade 12 nut | Highest tensile — critical applications | Precision tooling, dies, critical machinery, heavy flanges |
Coating Options
| Coating | Corrosion Protection | Best For | Typical Use in India |
|---|---|---|---|
| Yellow Zinc | Good — 96–200 hrs salt spray | General industrial and structural — most common | Standard for Grade 8.8 structural and EPC equipment bolts |
| Zinc Plated | Moderate — 72–96 hrs salt spray | Indoor or sheltered industrial service | Indoor machinery, general equipment assembly |
| Cad Plated | Excellent — aerospace / defence standard | Aerospace, defence, high humidity | Defence equipment, aerospace, offshore critical bolting |
| Teflon Blue (PTFE) | Excellent + anti-galling + torque control | SS bolts, chemical plant, controlled torque | SS316 equipment bolts in chemical and pharma plants |
| Plain Finish | None — bare metal | High temp or customer-applied coating | High temp equipment, further processed by buyer |
Technical Specifications – Hex Bolt
| Parameter | Specification |
|---|---|
| Product Type | Hex Bolt (Hexagonal Head Bolt / Hex Cap Screw) |
| Head Type | Hexagonal (6-sided) — spanner / socket wrench drive |
| Thread Form | Metric ISO coarse / fine | Inch UNC / UNF |
| Metric Size Range | M10 to M72 |
| Inch Size Range | ½” to 3″ |
| Thread Length | Partial or full thread — as per DIN 931 / DIN 933 / ASME B18.2.1 |
| Dimensional Standard | IS 1364 | DIN 931 (partial thread) | DIN 933 (full thread) | ASME B18.2.1 |
| Material Standard | ASTM A193 / A193M | IS 1367 | DIN 267 |
| Testing Standard | IS 1367 | ASTM A193 / A194 | DIN 267 |
| Compatible Nuts | Hex Nut / Heavy Hex Nut — grade matched (see table) |
| MOQ | 10 Nos |
| HSN Code | 73181590 |
Partial Thread vs Full Thread Hex Bolt — Which to Specify
| Type | Standard | Thread Coverage | Best For | Typical Use |
|---|---|---|---|---|
| Partial Thread Hex Bolt | DIN 931 / ASME B18.2.1 | Threads at nut end — plain shank near head | High shear load — structural connections | Structural steel bolting, equipment mounting, shear connections |
| Full Thread Hex Bolt | DIN 933 / ASME B18.2.1 | Fully threaded shank | Tensile load — through-bolt connections | Equipment assembly, machinery, tapped hole connections |
Specify partial (DIN 931) or full thread (DIN 933) when ordering. If not specified, Krishna Industries will confirm before dispatch.
All Material Variants — Full Keyword Coverage
Krishna Industries supplies the following Hex Bolt grades and variants for Indian EPC, structural, and industrial projects:
Grade 8.8 hex bolt metric M10 M12 M16 M20 M24 M30 M36 yellow zinc supplier India. Grade 8.8 hex bolt bulk supply EPC structural Ahmedabad. Grade 10.9 hex bolt high tensile metric supplier India. Grade 12.9 hex bolt critical machinery supplier Ahmedabad Gujarat. ASTM A193 B7 hex bolt supplier India. B7 hex bolt yellow zinc coated industrial supplier Ahmedabad. A193 B8M SS316 hex bolt chemical plant supplier India. SS316 hex bolt A4-70 high tensile pharmaceutical plant India. SS304 hex bolt A2-50 metric supplier Ahmedabad. SS316 hex bolt Teflon blue coated anti-galling chemical service India. Grade 4.6 hex bolt construction structural supplier India. Hex bolt DIN 931 partial thread metric supplier India. Hex bolt DIN 933 full thread metric supplier Ahmedabad. Hex head bolt stainless steel SS304 SS316 bulk supply India. Hex bolt inch ½ to 3 inch UNC UNF supplier India. ASTM A193 B7M hex bolt NACE sour service India. High tensile hex bolt grade 8.8 10.9 12.9 EPC supply India. Hex bolt bulk supply purchase manager MRO Ahmedabad Gujarat India.
Applications in Indian Industries
- Structural steel connections — beams, columns, trusses, mezzanines (Grade 8.8 / 10.9)
- Industrial equipment mounting and assembly — frames, bases, covers
- Machinery bolting — motors, pumps, gearboxes, compressors
- Civil construction — bridges, pre-engineered buildings, steel structures
- Process equipment covers — manholes, inspection covers, heat exchanger heads
- Valve bonnet and cover bolting — gate, globe, check valve bodies
- Chemical plant equipment bolting — reactors, vessels, agitators (B8M, SS316)
- Pharmaceutical plant SS316 equipment connections (A4-70, Teflon Blue)
- Food processing and dairy equipment (SS304, SS316 — A2-50, A4-50)
- Power plant equipment and structural bolting (B7, B16)
- Offshore and coastal industrial structures (A4-70, Cad plated)
- EPC project bulk structural and equipment fastener BOM supply
EPC Contractors — Bulk Hex Bolt Supply
Hex Bolts are a high-volume line item in EPC structural, civil, and equipment BOMs. Krishna Industries supplies complete EPC fastener packages:
- Complete structural and equipment BOM fastener supply — all grades and sizes
- Matched bolt and nut sets — hex bolt + hex nut correct grade pairing
- MTC for ASTM A193 grades — chemical composition and mechanical properties
- IS 1367 test certificates for commercial grades 8.8, 10.9, 12.9
- NACE compliance certificate for B7M and L7M on request
- GST invoices — GSTIN: 24AKLPP6499B1ZT
- E-way bill and delivery challan for PAN India transport
- Fast dispatch from Ahmedabad — 2 to 5 working days standard grades
- Project-rate bulk pricing for large EPC quantities
As a multi-product B2B supplier, Krishna Industries consolidates Hex Bolts with Stud Bolts, Double Ended Studs, Full Threaded Studs, Hex Nuts, Washers, Pipe Flanges, Pipe Fittings, and Valves in single orders — one supplier, one invoice, one dispatch for complete EPC project material procurement.
Purchase Managers and MRO Buyers
- MOQ 10 Nos per line item — accessible for maintenance and top-up quantities
- Partial and full thread both available — confirm type when ordering
- Matched bolt and nut sets available — eliminates separate sourcing
- MTC provided for ASTM and IS 1367 grades
- Consistent batch quality from verified manufacturers
- Fast repeat order processing — share previous PO details for quickest turnaround
- Complete GST invoice documentation for accounts compliance
PAN India Supply Coverage
Maharashtra — Mumbai, Pune, Navi Mumbai, Nashik, Aurangabad, Nagpur
Gujarat — Ahmedabad, Surat, Vadodara, Rajkot, Bharuch, Ankleshwar, Vapi, Dahej
Rajasthan — Jaipur, Jodhpur, Udaipur, Kota, Bhilwara, Alwar
Delhi NCR — Delhi, Noida, Gurgaon, Faridabad, Ghaziabad
Tamil Nadu — Chennai, Coimbatore, Madurai, Tirupur, Salem
Karnataka — Bangalore, Hubli, Mysore, Belgaum, Mangalore
Telangana and Andhra Pradesh — Hyderabad, Vizag, Vijayawada, Kakinada
Madhya Pradesh — Indore, Bhopal, Jabalpur, Pithampur
Punjab and Haryana — Ludhiana, Amritsar, Chandigarh, Panipat
West Bengal — Kolkata, Durgapur, Asansol, Haldia
Odisha, Jharkhand, Chhattisgarh — all industrial zones
Export supply available FOB Mundra / JNPT. IEC registered exporter — IEC: AKLPP6499B.
Quality and Documentation
- Material Test Certificate (MTC) — ASTM A193 and IS 1367 grades
- Chemical composition and mechanical property test reports
- NACE MR0175 compliance certificate for B7M and L7M on request
- Dimensional inspection records on request
- GST invoice — GSTIN: 24AKLPP6499B1ZT
- Industrial packaging — grade, size, coating, thread type clearly marked
- E-way bill and delivery challan for PAN India transport
Related Products from Krishna Industries (KELOR)
- Stud Bolt — ASME B16.5 pipe flange bolting — A193 B7 / A194 2H
- Double Ended Stud — plain shank both ends — equipment tapped hole bolting
- Full Threaded Stud — 100% threaded rod — custom length structural and general use
- Hex Nut / Heavy Hex Nut — matched nut grades for all hex bolt grades
- Plain Washer / Spring Washer — complete fastener set
- Pipe Flange — Slip-on, Weld Neck, Blind — consolidated flange and fastener supply
All available from Krishna Industries — single GST invoice, consolidated PAN India dispatch.
Frequently Asked Questions
1. What is a hex bolt?
A hex bolt is a fastener with a six-sided (hexagonal) head and a threaded shank. It is tightened using a spanner or socket wrench on the head. Used in structural steel, equipment assembly, machinery, and industrial applications — wherever a headed fastener inserted from one side is required.
2. What is the difference between hex bolt and stud bolt?
A hex bolt has a hexagonal head — inserted from one side and secured by a nut. A stud bolt has no head — it is a fully threaded rod used with nuts on both ends for ASME pipe flange joints. Hex bolts are for structural and equipment applications. Stud bolts are for ASME pressure pipe flanges.
3. What is the most common hex bolt grade in India?
Grade 8.8 yellow zinc coated hex bolt is the most widely used grade in Indian structural steel, industrial equipment, and EPC project structural BOMs. It provides a good balance of strength, cost, and availability.
4. What grade for chemical plant or SS equipment?
A193 B8M (SS316) for process equipment in chemical plant. A4-70 (SS316 high tensile) for high-load SS equipment bolting. Both available with Teflon Blue coating for anti-galling on SS threads.
5. Partial thread or full thread — what to order?
Partial thread (DIN 931) for structural shear connections and through-bolt applications. Full thread (DIN 933) for tapped hole connections and shorter grip length applications. Specify when ordering — Krishna Industries confirms before dispatch if not specified.
6. What coating for outdoor structural applications?
Yellow Zinc (yellow passivate) for Grade 8.8 structural hex bolts in most Indian outdoor and industrial applications. Hot Dip Galvanised available on request for longer-term outdoor corrosion protection.
7. What coating for SS hex bolts in chemical plant?
Teflon Blue (PTFE coated) reduces galling on SS threads during assembly, controls torque coefficient for accurate bolt load, and adds chemical resistance. Standard for B8M and A4-70 hex bolts in chemical and pharmaceutical plant equipment.
8. What metric sizes are available?
M10 to M72 — covering all standard Indian structural, equipment, and industrial hex bolt sizes.
9. What inch sizes are available?
½” to 3″ UNC/UNF covering US standard and ASME equipment bolting requirements.
10. Do you supply hex bolts with nuts as a set?
Yes — matched hex bolt and hex nut sets supplied together. Specify grade, size, and whether you need bolts only, nuts only, or complete bolt-nut sets.
11. What is the MOQ?
MOQ is 10 Nos per line item. Structural and equipment BOM-based bulk orders welcome with project-rate pricing.
12. Can I order hex bolts with stud bolts, flanges, and valves in one order?
Yes — Krishna Industries supplies hex bolts, stud bolts, all fastener types, pipe flanges, pipe fittings, and valves in consolidated single orders — single GST invoice, single dispatch. Share your complete project BOM for consolidated quotation.
Conclusion
The Hex Bolt supplied by Krishna Industries (KELOR) covers every grade required for Indian structural, EPC equipment, and industrial applications — ASTM A193 B6, B7, B7M, L7, L7M, B8, B8M, B8T, B16, Stainless Steel SS304, SS316, SS321, A2-50, A4-50, A4-70, and commercial grades 4.6, 8.8, 10.9, 12.9 — Metric M10 to M72 and Inch ½” to 3″ — Yellow Zinc, Cad Plated, Teflon Blue, Zinc Plated, and Plain Finish coatings — partial and full thread options. Sourced from verified Indian manufacturers with MTC, GST documentation, and fast PAN India dispatch from Ahmedabad.
For EPC contractors, structural purchase managers, equipment fabricators, MRO teams, and bulk fastener buyers — contact Krishna Industries (KELOR), your trusted Hex Bolt supplier in Ahmedabad, Gujarat, India. Share your BOM or size-grade list for bulk pricing within 24 hours.
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