Why Industrial Buyers Choose Ganpat Industrial for Carbon Steel Bolts?
Lowest Cost Per Joint
Commodity carbon steel – the most economical bolting grade in the market
Predictable Strength
60 ksi minimum tensile, verified on full-size test pieces
Easy To Machine & Form
Low-carbon chemistry bends, cuts and re-threads on site without cracking
Galvanizing Friendly
Takes zinc plating or hot-dip galvanizing for outdoor service
Everywhere, Always
Full size run in ready stock – no mill lead time on standard items
Carbon Steel Bolt Spotlight
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Type: Hex Bolts, Heavy Hex Bolts, Carriage Bolts & Stud Bolts -
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Size Range: M6 to M100 • Custom sizes available -
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Grades Stocked: ASTM A307, A325, A490, Grade 4.6, 5.6, 8.8 -
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Standards: ASTM A307, ASTM A325, ASTM A490, ASME & DIN Standards -
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Origin: Indian Origin • European Origin • Japanese Origin -
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Finish: Plain, Zinc Plated, Hot Dip Galvanized & Black Oxide
Or call our Mumbai office:
+91 22 6743 7134
• Fast dispatch on ready stock sizes
Ganpat Industrial is an established Carbon Steel Bolt Supplier in India. We stock ASTM A307, A563 and various metric grades. Our carbon steel bolts meet international ASTM and DIN specifications. From structural connections to industrial machinery, we supply reliable fasteners. Each order is supplied with quality documentation and traceability. We serve customers across India, the UAE and wider Middle East.
Mumbai · Carbon Steel Bolt Manufacturer In India
Carbon Steel Bolts Built for Strength, Reliability, and Performance.
Ganpat Industrial stocks Carbon Steel Bolts in ASTM A307 and other grades for buyers in construction, structural, automotive and industrial applications across India, the UAE and the Middle East.
- ✓High Tensile Strength
- ✓Precision Threading
- ✓Multiple Head Styles
- ✓Custom Sizes Available
Genuine ASTM A307 Carbon Steel Nut Manufacturer in India With Metric And DIN Standards
Carbon Steel Bolt Specification
Every Carbon Steel Bolt Supplier in India quotes a grade – we back ours with the full A307 datasheet below
Carbon Steel Stud Bolts Grades
- Grade A – general purpose
- Grade B – cast iron flange joints
- Grade C – now ASTM F1554 Gr 36
- Default supply: Grade A
CS Square Bolt Size Range
- Diameter: 1/4 in. – 4 in.
- Length: 3/4 in. – 72 in.
- Threaded rod up to 3 m
- Custom lengths on order
Grade A CS Countersunk Bolt Surface Finish
- Plain / Self Colour
- Zinc Plated – ASTM F1941
- Hot-Dip Galvanized – ASTM F2329
- Oiled / Phosphate on request
ASTM A563 CS Coupling Nut Pairing
- ASTM A563 Grade A hex nut
- Heavy hex above 1-1/2 in.
- ASTM A563 CS Coupling Nut
- A194 grades for stud service
Carbon Steel Grade 2HM Panel Nut Documentation
- Mill Test Certificate EN 10204 3.1
- Heat number traceability
- Lab report on request
- Certificate of Origin
A307 Carbon Steel U Bolt Supply Condition
- Forged in-house, Mumbai
- Ready stock standard sizes
- Trial lot to container load
- Same-week dispatch on stock
Dimensions of ASTM A307 Carbon Steel Bolt
Available in standard and custom sizes for diverse applications.
| Nominal Diameter (in.) | UNC Threads Per Inch | Width Across Flats (in.) |
|---|---|---|
| 1/4 | 20 | 7/16 |
| 5/16 | 18 | 1/2 |
| 3/8 | 16 | 9/16 |
| 1/2 | 13 | 3/4 |
| 5/8 | 11 | 15/16 |
| 3/4 | 10 | 1-1/8 |
| 7/8 | 9 | 1-5/16 |
| 1 | 8 | 1-1/2 |
| 1-1/8 | 7 | 1-11/16 |
| 1-1/4 | 7 | 1-7/8 |
| 1-1/2 | 6 | 2-1/4 |
Grade A vs Grade B Bolt Comparison
A307 Grade A
- Tensile 60 ksi (414 MPa) minimum
- Hex bolts, studs, bent bolts
- General fastening duty
- Hardness Rockwell B69–B100
A307 Grade B
- Tensile 60–100 ksi (414–690 MPa) capped
- Heavy hex bolts & studs only
- Cast iron flange joints in piping
- Hardness Rockwell B69–B95
Head Drives of Carbon Steel Grade A T Bolt
Hex Head – Default Drive
Heavy Hex – Grade B Flange Duty
Square Head – Wrench Grip Legacy
T Head – Slot & Channel Fixing
Eye – Rigging & Guying
Countersunk Flat – Flush Seating
Wing – Hand-Tight Assemblies
U Form – Pipe & Cable Clamping
Welding Process of ASTM A563 CS Coupling Nut
We use reliable welding processes to ensure strong and durable joints.
Declare Weld Duty At Enquiry
Tell us the bolt will be welded so S1 material is planned from the heat stage
Step 1
Restricted S1 Chemistry
Carbon 0.30% max, Manganese 1.00% max, Silicon 0.50% max, Sulfur 0.05% max
Step 2
Carbon Equivalent Reported
CE calculated per heat and stated on the certificate when requested on the order
Step 3
Weld Under Fabricator WPS
Welding parameters and electrode selection remain the fabricator’s qualified procedure
Step 4
Monthly Delivery of Grade A CS Countersunk Bolt to Below Countries
| Export to | Countries | Continent | Shipping time | Ports |
|---|---|---|---|---|
|
Morocco | Africa | 45 Days | Nador |
|
Bahrain | Asia | 9 Days | Mina Salman |
Need Carbon Steel Nut On One BOQ?WhatsApp the list – grade-wise factory price with MTC 3.1 in 24 hours.
Different Types of Carbon Steel Bolt
ASTM A307 Gr.B Carbon Steel Hex Head Bolt
Heavy Hex
Carbon Steel Grade A T Bolt
Slot Fixing
CS Square Bolt
ASME B18.2.1
Carbon Steel Grade 7M Lock Nut
A194 7M
A307 Carbon Steel U Bolt
Pipe Clamp
Carbon Steel Gr C Eye Bolts
Bent Forge
Carbon Steel Gr 2 Wing Nut
Hand Tighten
Grade A CS Counter Sunk Bolt
Flat Head
Carbon Steel Gr B Lag Bolt Machining Services
Hot Forged Heads
Hex, heavy hex, square, T and eye heads forged in-house
Thread Rolling & Cutting
UNC / UNF / metric to Class 2A gauge acceptance
Cut-To-Length Rod
Threaded bar sawn to your exact stud schedule
Bending – U, Eye, J
Bent bolt forms on pipe-size mandrels per drawing
Plating & Galvanizing
Zinc per ASTM F1941, hot-dip per ASTM F2329
Torque Chart of Carbon Steel A307 Stud
| Bolt Size (in.) | TPI | Proof Load (lbs) | Clamp Load (lbs) | Torque Lubricated (ft-lb) | Torque Plain / Dry (ft-lb) |
|---|---|---|---|---|---|
| 1/2 | 13 | 5,100 | 3,825 | 23.9 | 31.9 |
| 5/8 | 11 | 8,130 | 6,098 | 47.6 | 63.5 |
| 3/4 | 10 | 12,025 | 9,019 | 84.6 | 112.7 |
| 7/8 | 9 | 15,200 | 11,400 | 124.7 | 166.3 |
| 1 | 8 | 20,000 | 15,000 | 187.5 | 250.0 |
| 1-1/8 | 7 | 25,200 | 18,900 | 265.8 | 354.4 |
| 1-1/4 | 7 | 32,000 | 24,000 | 375 | 500 |
Chemical Composition of Carbon Steel Threaded Rod
CarbonC
≤ 0.29%
ManganeseMn
≤ 1.20%
PhosphorusP
≤ 0.04%
Sulfur – Grade AS
≤ 0.15%
Sulfur – Grade BS
≤ 0.05%
IronFe
Balance
Mechanical Properties of A307 Carbon Steel U Bolt
Tensile – Grade A
60 ksi Min
414 MPa
Tensile – Grade B
60–100 ksi
414–690 MPa Capped
Elongation
18% Min
Machined Specimen
Hardness
B69–B100
Gr B: B69–B95
Carbon Steel Grade 2HM Panel Nut Material Equivalent
American Standard
- ASTM A307 Grade A / B
- SAE J429 Grade 2 (nearest)
- ASME B18.2.1 dimensions
European Standard
- Property Class 4.6 / 4.8 – ISO 898-1 (nearest)
- DIN 931 / DIN 933
- ISO 4014 / ISO 4017 dimensions
Japanese Standard
- JIS B 1180 hex bolt dimensions
- Strength class 4.6 / 4.8 – JIS B 1051
- Confirm class per project spec
Thread Types of ASTM A307 Carbon Steel Bolt
UNC Coarse
ASME B1.1
Class 2A fit – the default on A307
UNF Fine
ASME B1.1
On request for vibration-sensitive joints
8UN Series
8 TPI
Constant pitch for diameters above 1 in.
Metric Coarse
ISO Profile
Metric & DIN pattern bolting on order
Export Packaging of Grade A CS Countersunk Bolt
Anti-Rust Oil Coat
Plain-finish bolting oiled before packing to hold off transit rust
Poly Bag & Carton
Size-wise bags with count labels for small and trial lots
Wooden Box Or Pallet
Seaworthy boxing for container-load export shipments
Grade & Heat Marking
Grade, size and heat number on every package per buyer format
Testing Methods of Carbon Steel Threaded Bar
Full-Size Tensile Test
Bolt pulled to verify the 60 ksi minimum on the finished fastener
Hardness Check
Rockwell B survey against the grade band on sample pieces
Thread Gauging
GO / NO-GO ring gauge acceptance to Class 2A fit
Dimensional & Visual
Across flats, head height, length and surface per ASME B18.2.1
Heat Chemistry Report
Ladle analysis certified against A307 limits on the MTC
MTC EN 10204 3.1
Certificate issued lot-wise; third-party witness on request
Buy CS Threaded Bar and Stud Bolts up to 1-1/2 inches for Piping Applications
Carbon Steel Gr C Eye Bolts Applications
Ideal for industrial, structural, automotive, and general engineering applications.
Cast Iron Flange Joints (Grade B)
Pipe Supports & Hangers
Non-Structural Steel Framing
HVAC Duct & Skid Assembly
Machinery & Equipment Fixing
Agricultural Implements
Fencing & Railing Hardware
General OEM Fabrication
CS Square Bolt Delivered Weekly To The Following Countries
| Export to | Countries | Continent | Shipping time | Ports |
|---|---|---|---|---|
 |
Egypt | Africa | 18 Days | Damietta |
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Kuwait | Asia | 10 Days | Mina Al Shuaiba |
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Netherlands | Europe | 30 Days | Den Helder |
Frequently Asked Questions
What are common Carbon Steel Stud Bolts uses?
General fastening, pipe supports, equipment assembly and steel work.
What Grade A CS Countersunk Bolt sizes are covered by ASTM A307?
ASTM A307 covers bolt diameters from 1/4 in. to 4 in.
How is CS Square Bolt price worked out?
Price depends on grade, size, finish and quantity.
Can Carbon Steel Gr 2 Wing Nut be welded?
Yes, when ordered with Supplementary Requirement S1.
Weekly Shipment to Below Locations
| Continents | Country |
|---|---|
| Africa | Nigeria, Egypt, South Africa, Kenya, Ghana, Ethiopia |
| North America | United States, Canada, Mexico, Cuba |
| Asia | India, Japan, South Korea, Indonesia, Saudi Arabia, Iran |
| Europe | Germany, France, UK, Italy, Spain, Poland, Ukraine |
| South America | Brazil, Argentina, Colombia, Chile, Peru |
| Australia | New Zealand, Papua New Guinea, Fiji, Samoa |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA