Why Fabricators Pick Our SS 304 Bolt & Nut Range First?
Cr-Ni Verified Heats
Every bar is PMI-tested for chromium and nickel ratio.
Solution Annealed To A193
Controlled heat treatment ensures corrosion resistance and ductility.
Hex, Allen, Stud & Anchor
Multiple head styles made to your drawing specification.
Heat-Wise Traceability
Every carton is matched to its mill test certificate.
Ready Stock, Quick Dispatch
Fast-moving sizes packed and shipped within days.
Stainless Steel 304 Bolt Quick Facts
- 1Bolt Family: Hex, Allen, Stud, Eye, U, J & Anchor Bolts
- 2Size Coverage: M6 to M64 | Length 20mm to 300mm+
- 3Governing Standard: ASME SA193, ASTM A193 Gr. B8, UNS S30400
- 4Surface Options: Passivated, Pickled, Bright Polished, Black Oxide
- 5Common Marking: A2-70, 304, S30400, 1.4301
- 6Service Use: Marine, Food, Pharma, Solar & Structural Fixing
Or call our Mumbai office: +91 22 6743 7134 • SS 304 bolts dispatched with heat-wise MTC
Every batch starts as certified UNS S30400 bar per ASME SA193. As a Stainless Steel 304 Bolt Supplier in India, we passivate bolts. Our range covers SS 304 hex bolts, Allen, stud, eye, U, anchor bolts and nuts. Werkstoff Nr. 1.4301 Studs chemistry backs every hex, stud and anchor bolt. Mild steel fasteners rust fast in humid coastal and chemical conditions. We operate as a complete Stainless Steel 304 Bolt manufacturer in India. We serve marine, food-grade, solar and structural fabrication sectors nationwide. Custom drawing-based bolts and ready stock ship from our Mumbai warehouse fast.
Mumbai · Austenitic Stainless Fastener Exporter
Stainless Steel 304 Bolt
Ganpat Industrial forges and threads ASME SA193 SS 304 Hex Head Bolts, UNS S30400 Stud Bolts and Werkstoff Nr. 1.4301 Allen Bolts for fabricators who cannot risk a rusted or seized joint in marine, food-grade, solar and structural fixing work across India, the GCC and Southeast Asia.
- ✓ISO 9001:2015
- ✓ASTM A193 & A194 Certified
- ✓Mill Test Certificate 3.1
- ✓PMI & Proof Load Tested
- ✓Third-Party Inspection Approved
High Strength UNS S30400 Hex Bolt Manufacturer in India with MTC
Stainless Steel 304 Bolt Specification
SS 304 Hex Bolt Size & Diameter Range
- Thread: M6 to M64, coarse & fine pitch
- Length: 20mm to 300mm, custom on request
- Head: Hex, Allen, Flange & Eye Style
- Standard & drawing-based custom sizes
SS 304 Anchor Bolts International Standard
- ASME SA193 / ASTM A193 Grade B8
- ASTM A194 Grade 8 for Nuts
- DIN 931 / DIN 933 Reference
- ISO 4014 / ISO 4017 Compatibility
UNS S30400 Stud Bolts Head & Drive Styles
- Hex Head & Socket / Allen Head
- Flange Head With Serration
- Eye, U-Bend & J-Bend Style
- Anchor & Foundation Style
304 SS Coupling Nut Material Grade & Chemistry
- UNS S30400 Base Chemistry
- Werkstoff Nr. 1.4301 Equivalent
- AISI 304 Solution-Annealed Bar
- Custom Drawing Chemistry Match
Stainless Steel 304 Nuts Surface Finish
- Passivated & Pickled (Standard)
- Bright Polished Finish
- Black Oxide / PVD On Request
- Electropolished For Pharma Duty
Din 1.4301 Allen Bolts Testing & Inspection
- PMI Testing
- Salt Spray Test (ASTM B117)
- Proof Load & Tensile Test
- Third-Party Inspection
ASTM A193 SS 304 Anchor Bolts Size Chart
Contact with trusted Stainless Steel 304 Bolt Manufacturer in India For custom sizes.
| Size | Thread Pitch (mm) | Wrench Size AF (mm) | Head Height (mm) | Body Dia (mm) |
|---|---|---|---|---|
| M6 | 1.00 | 10 | 4.0 | 6 |
| M8 | 1.25 | 13 | 5.3 | 8 |
| M10 | 1.50 | 17 | 6.4 | 10 |
| M12 | 1.75 | 19 | 7.5 | 12 |
| M16 | 2.00 | 24 | 10.0 | 16 |
| M20 | 2.50 | 30 | 12.5 | 20 |
| M24 | 3.00 | 36 | 15.0 | 24 |
Is Stainless Steel 304 Nuts Magnetic? Quick Buyer Facts
Weakly Magnetic Only
Austenitic 304 stays largely non-magnetic in the annealed condition
Cold Working Changes This
Rolled threads & forged heads can show mild magnetism at the surface
Not A Grade Indicator
Magnet test alone cannot confirm genuine UNS S30400 chemistry
Stainless Steel 304 Bolt Vs SS 316 Bolt – Which To Choose?
SS 304 Bolt
- General-purpose Cr-Ni chemistry, easy to source
- Good resistance to mild atmospheric & freshwater exposure
- Lower cost, widest ready-stock availability
- Best for structural, food & solar fixing
SS 316 Bolt
- Molybdenum-added chemistry for chloride resistance
- Better performance in seawater & coastal salt spray
- Higher cost, longer lead time on some sizes
- Best for offshore, marine & chemical duty
Is UNS S30400 Bolt Same As A2-70 Grade?
Same Base Chemistry
A2-70 under ISO 3506 covers the same UNS S30400 / 1.4301 family
70 Denotes Strength Class
The number 70 marks a 700 MPa minimum tensile property class
ASME Route Differs
ASTM A193 Grade B8 uses a separate ksi-based classification instead
Not Sure Which SS 304 Head Style Fits Your Joint?Share your drawing & load requirement – we confirm the right bolt style.
Types Of Stainless Steel 304 Bolts & Nuts We Supply
As an active Stainless Steel 304 Bolt Supplier in India, we stock every head, thread and nut style used across process and structural fixing.
ASTM A193 Stainless Steel 304 Hex Bolt
ASTM A193 B8
Werkstoff Nr. 1.4301 Flange Head Bolt
DIN 6921
Din 1.4301 Allen Bolt
DIN 912
SS 304 Eye Bolt
DIN 580
UNS S30400 Stud Bolt
ASTM A193 B8
UNS S30400 U Bolt
Custom Drawing
Stainless Steel 304 J Bolt
Custom Drawing
ASTM A193 SS 304 Anchor Bolt
Wedge / Sleeve
SS 304 Bolt Price Per Kg – What Decides The Rate?
Get A Live Per-Kg Rate TodayShare your size, standard and quantity for an SS 304 bolt quote.
Corrosion-resistant ASME SA193 SS 304 Hex Head Bolts in Metric Sizes for Marine Engineering
Weekly Delivery Of Stainless Steel 304 Bolt In Below Countries
| Export To | Continent | Port | Shipping Time |
|---|---|---|---|
Peru |
South America | Santos Port | 23-55 Days |
Morocco |
Africa | Durban Port | 15-33 Days |
Chemical Composition Of SS 304 Bolt
Reference chemistry for UNS S30400 / Werkstoff Nr. 1.4301 as per ASTM A193 Grade B8.
Chromium Cr
18.0 – 20.0 %
Nickel Ni
8.0 – 10.5 %
Manganese Mn
2.00 % Max
Silicon Si
1.00 % Max
Carbon C
0.08 % Max
Phosphorus P
0.045 % Max
Sulphur S
0.030 % Max
Iron Fe
Balance
As per ASTM A193 / A276 Grade B8 (UNS S30400) chemistry range.
Mechanical Properties Of ASTM A193 SS 304 Bolt
Grade B8 Class 1, solution-annealed condition, all sizes.
Tensile Strength
≥ 515 MPa
75 ksi Min, Class 1
Yield Strength (0.2%)
≥ 205 MPa
30 ksi Min, Class 1
Elongation
≥ 30%
High Ductility
Hardness (Max)
≤ 96 HRB
223 HB Max, Annealed
Need A Certified Tensile & Hardness Report?Send size, quantity & standard for a free document review.
Monthly Delivery Of Stainless Steel 304 Bolt In Below Countries
| Export To | Continent | Port | Shipping Time |
|---|---|---|---|
Bahrain |
Asia | Shenzhen Port | 9 Days |
Algeria |
Africa | Lagos Port | 27 Days |
Stainless Steel 304 Bolt Equivalent Grades
ASTM / UNS (USA)
- ASTM A193 Grade B8 (Bolts)
- ASTM A194 Grade 8 (Nuts)
- UNS S30400
- AISI 304
DIN / WNr (Europe)
- Werkstoff Nr. 1.4301
- DIN 931 / DIN 933 (Bolts)
- DIN 934 (Nuts)
- DIN EN ISO 3506, Grade A2-70
JIS / BS & Trade Name
- JIS G4303, SUS304
- BS 970, 304S31
- Often searched as “SS304 A2-70 Bolt”
Test Certification Offered With SS 304 Bolt
Mill Test Certificate 3.1
Chemistry, hardness & tensile results traced to heat number
Every Order
PMI Test Report
Positive Material Identification confirming Cr & Ni content
On Request
Proof Load Test Report
Confirms bolt withstands rated load without permanent set
On Request
Salt Spray Corrosion Report
ASTM B117 exposure result confirms passivation quality
On Request
Certificate Of Origin
For customs clearance & import duty processing
Export Orders
Need A Third-Party Witnessed Test Certificate?We coordinate SGS, Bureau Veritas or TUV inspection on request.
Surface Finish Options For UNS S30400 Stud Bolts
Passivated (ASTM A967)
Removes free iron and restores the full corrosion-resistant oxide film
Pickled & Descaled
Acid pickling removes forging scale and evens out the surface tone
Bright Polished
Mirror-smooth head and shank for visible or sanitary hardware
Black Oxide / PVD Coated
Decorative dark finish for architectural & railing fasteners
Electropolished
Ultra-smooth, low-friction surface for pharma & food-grade duty
SS 304 Hex Bolt Torque Chart
Recommended dry, as-received tightening torque for Grade A2-70 stainless bolts. Reduce by 10-15% if lubricated.
M6
10 Nm
Coarse thread, A2-70 class
M8
25 Nm
Coarse thread, A2-70 class
M10
50 Nm
Coarse thread, A2-70 class
M12
88 Nm
Coarse thread, A2-70 class
M16
215 Nm
Coarse thread, A2-70 class
M20
435 Nm
Coarse thread, A2-70 class
Need Torque Values Confirmed For Your Exact Grade?Send bolt size & property class – we return a signed torque sheet.
Werkstoff Nr. 1.4301 U Bolts Weight Chart
Approximate weight per piece for hex head bolt – confirm exact figure against your mill test certificate.
M8 x 40mm
~0.014 kg
Hex head, coarse thread
M12 x 50mm
~0.043 kg
Hex head, coarse thread
M16 x 60mm
~0.098 kg
Hex head, coarse thread
M20 x 80mm
~0.205 kg
Hex head, coarse thread
Thread Pitch Chart For Stainless Steel 304 J Bolt
Coarse thread series per DIN 933 / ISO 4017 – standard on all ready-stock hex bolts.
M6
1.00 mm
Coarse pitch
M8
1.25 mm
Coarse pitch
M10
1.50 mm
Coarse pitch
M12
1.75 mm
Coarse pitch
M16
2.00 mm
Coarse pitch
M20
2.50 mm
Coarse pitch
How To Identify A Genuine ASTM A193 SS 304 Bolt
Ask For Heat-Wise MTC 3.1
Certificate must show chemistry, tensile & heat number matching the marking
Step 1
Request PMI Spot Verification
Cr & Ni reading on the bolt head must match the certified MTC values
Step 2
Check Head Markings
Grade, standard, property class & manufacturer logo should be die-stamped
Step 3
Verify Third-Party Inspection
SGS, BV or TUV report confirms independent test results on the lot
Step 4
Stainless Steel 304 Nuts Packing & Export Documentation For SS 304 Bolt
Poly Bag & Carton Box Packing
Bulk Wooden Pallet / Crate
Packing List, Invoice & COO
FCL / LCL Sea & Air Freight
Need Weight Confirmed For Your Full Order List?Send size, quantity & grade – we return a signed weight sheet same day.
Application Of SS 304 Bolt & Nut
Reach out to our export desk, already shipping into these process sectors every month.
Marine & Shipbuilding Hardware
Food Processing & Dairy Equipment
Pharma & Chemical Plant Piping
Architectural & Railing Fixings
Solar Panel Mounting Structures
Water Treatment & Desalination
Automotive & Railway Fabrication
Structural Steel Fabrication
Need Your Full Bolt & Nut Kit Quoted Together?Share your BOM – we confirm sizes, grade and delivery in one quote.
Frequently Asked Questions
What is the SS 304 Nut Bolt price?
Price depends on size, standard and order quantity – share specs for an exact quote.
What stainless steel 304 bolt size range do you stock?
We stock M6 to M64 across hex, stud, Allen and anchor bolt styles.
Is SS 304 bolt suitable for outdoor marine use?
Yes, UNS S30400 resists rust well in mild marine and atmospheric exposure conditions.
What surface finish is standard on SS 304 hex bolts?
Passivated and pickled finish ships standard; bright polished is available on request.
Explore Nearby Locations for the Quickest Delivery Options
| Saudi Arabia | UAE | Oman | Nigeria | South Africa |
| USA | Algeria | Kenya | Angola | Tanzania |
| Ethiopia | Zambia | Ghana | Gabon | Morocco |
| New South Wales | Mozambique | Egypt | Tunisia | – |
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