Why Buyers Source Stainless Steel 304 Washers From Ganpat Industrial ?
Mill-Direct Pricing
No trader markups — priced straight from the forge
One Enquiry, Full Range
Flat • Lock • Spring • Sealing — all in one PO
Certified Raw Material
ISO 9001 • PED • Petrofac approved heats only
Zero Inspection Surprises
PMI • salt spray • dimensional — before it ships
Quote In 24 Hours
Ready stock on standard sizes — ships same week
304 Stainless Steel Washer Overview
- 1Standards: ASME B18.22.1, DIN 125, DIN 127, ISO 7089, ISO 7090, ISO 3506
- 2Common Grades: UNS S30400, EN 1.4301, AISI 304, Werkstoff Nr. 1.4301
- 3Type: Flat, Lock, Spring, Sealing, Conical, Fender, Plain, Square, Machine, Star, Slot
- 4Size Range: M2 to M36 • OD 5 mm to 66 mm • per ASTM A312
- 5Finish: Bright Annealed, Passivated, Polished, Natural Mill Finish
- 6Origin: Indian origin • Japanese origin • European origin
Or call our Mumbai office: +91 22 6743 7134 • Fast dispatch on ready stock sizes
AISI 304 Washers from Ganpat Industrial are precision-forged from certified UNS S30400 / EN 1.4301 raw material and finished in-house through blanking, CNC punching and cold forming depending on the type ordered. The austenitic structure gives reliable corrosion resistance, consistent clamping load and stable performance under vibration, making these 304-grade sealing rings and lock discs suitable for refineries, marine decks, food plants, HVAC systems and structural steel yards. Every batch is tested and documented before dispatch. Ganpat Industrial Corporation is a Mumbai-based manufacturer and supplier with over 25 years of experience in stainless steel fasteners, serving customers across India, the UAE and the Middle East with ready stock and custom sizing.
Mumbai · Forging Manufacturer & Exporter
304 Grade Stainless Steel Washers Built to Hold Under Pressure, Not Just Pass Inspection
Ganpat Industrial forges and supplies AISI 304 / UNS S30400 Washers for buyers who cannot afford a loose joint refineries, marine decks, food plants and structural steel yards across India
- ✓ ISO 9001:2015
- ✓ ISO 14001:2015
- ✓ OHSAS 18001:2007
- ✓ PED Certified
- ✓ Petrofac Approved
A2-70 Grade SS 304 Flat & Spring Washers Engineered to ASME SA193 Standards
Stainless Steel 304 Washers Specification
Stainless Steel 304 Washer Size Range
- ID: M2 – M36
- OD: 5 – 66 mm
- Thickness: 0.3 – 5 mm
- Custom sizes on drawing
UNS S30400 Washer Governing Standard
- ASME B18.22.1
- DIN 125 / DIN 127
- ISO 7089 / 7090 / 7091
- ISO 3506 (A2-70)
AISI 304 Washer Production Route
- Precision Blanking
- CNC Punching
- Cold Forming (Spring/Lock)
- Deburring & Tumbling
EN 1.4301 Washer Surface Finish
- Bright Annealed
- Passivated (ASTM A967)
- Polished
- Natural / Mill Finish
304 SS Washer Material Grade
- UNS S30400
- EN 1.4301
- AISI 304
- ASTM A240
304 Grade Washer Testing
- PMI Testing
- Salt Spray Test
- Dimensional Check
- Third-Party Inspection
A2-70 Washer Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
Stainless Steel 304 Washer Packaging
- Poly Bags × Cartons
- Wooden Pallet Boxes
- Vacuum Pack (export)
- Custom Labelling
304 Stainless Steel Washer Origin
- Indian Origin
- Japanese Origin
- European Origin
- Traceable To Heat Number
Precision-Punched 304 Washers Available in Imperial & Metric Sizes, Dispatched on Quick Lead Time
Types Of Stainless Steel 304 Washers We Manufacture
SS 304 Flat Washer
ISO 7089
Stainless Steel 304 Spring Lock Ring
DIN 127
304 Stainless Steel Bonded Seal Ring
Bonded Seal
SS 304 Spring Washer
DIN 137
304 SS Belleville Disc
DIN 6796
Stainless Steel 304 Penny Washer
Wide OD
SS 304 Plain Ring
ASME B18.22.1
UNS S30400 Square Plate Washer
UNS S30400
EN 1.4301 Machine Bush Washer
EN 1.4301
A2-70 Toothed Star Washer
A2-70
AISI 304 Slotted Disc
AISI 304
304 Low Carbon Split Lock Ring
Low Carbon
Request A Quote →
304 Stainless Steel Plain Washer Size Chart
We are a leading Stainless Steel 304 Washers Manufacturer in India, offering accurate sizes from M2 to M36
| For Screw Nominal Size | Washer Thickness | Hole Diameter | Outside Diameter |
|---|---|---|---|
| M2.6 | 0.5 | 2.8 | 7 |
| M2.5 | 0.5 | 2.7 | 6 |
| M2 | 0.3 | 2.2 | 5 |
| M3.5 | 0.5 | 3.7 | 8 |
| M3 | 0.5 | 3.2 | 7 |
| M6 | 1.6 | 6.4 | 12 |
| M5 | 1 | 5.3 | 10 |
| M8 | 1.6 | 8.4 | 16 |
| M1.6 | 0.3 | 1.7 | 4 |
| M4 | 0.8 | 4.3 | 9 |
| M7 | 1.6 | 7.4 | 14 |
| M12 | 2.5 | 13 | 24 |
| M10 | 2 | 10.5 | 20 |
| M16 | 3 | 17 | 30 |
| M14 | 2.5 | 15 | 28 |
| M20 | 3 | 21 | 37 |
| M18 | 3 | 19 | 34 |
| M27 | 4 | 28 | 50 |
| M24 | 4 | 25 | 44 |
| M22 | 3 | 23 | 39 |
| M33 | 5 | 34 | 60 |
| M30 | 4 | 31 | 56 |
| M39 | 6 | 40 | 72 |
| M36 | 5 | 37 | 66 |
| M48 | 8 | 50 | 92 |
| M45 | 7 | 46 | 85 |
| M56 | 9 | 58 | 105 |
| M42 | 7 | 43 | 78 |
| M52 | 8 | 54 | 98 |
SS 304 vs SS 316 Washer
SS 304 Washer
- Chromium (Cr): 18–20%
- Nickel (Ni): 8–10.5%
- Molybdenum (Mo): 0%
- PREN (Pitting Index): ~18
- Relative Cost Index: 1.0x (Base)
- Typical Lead Time: Standard
SS 316 Washer
- Chromium (Cr): 16–18%
- Nickel (Ni): 10–14%
- Molybdenum (Mo): 2–3%
- PREN (Pitting Index): ~24–26
- Relative Cost Index: 1.3x–1.5x
- Typical Lead Time: +5–7 Days
AISI 304 Flat Washers Weight Chart
| Size | Weight |
|---|---|
| M1.7 | 0.031 |
| M2.5 | 0.088 |
| M2 | 0.037 |
| M2.3 | 0.092 |
| M2.6 | 0.127 |
| M4 | 0.308 |
| M3 | 0.119 |
| M3.5 | 0.155 |
| M7 | 1.39 |
| M5 | 0.443 |
| M6 | 1.02 |
| M12 | 6.27 |
| M9 | 1.83 |
| M10 | 3.57 |
| M16 | 10.24 |
| M18 | 14.7 |
| M14 | 8.62 |
| M16 | 11.3 |
| M22 | 18.3 |
| M20 | 17.2 |
| M26 | 43.7 |
| M24 | 32.3 |
304 Washer Price List
◆ Order Quantity
◆ Type (Flat / Lock / Spring)
◆ Finish & Testing
Request Quote →
UNS S30400 Sealing Washers HSN Code
HSN Heading
7318
Screws, bolts, nuts & washers of iron/steel
Flat / Plain Washer
7318 22 00
Non-threaded: other washers
Spring / Lock Washer
7318 21 00
Non-threaded: spring & lock washers
GST Rate
18%
Standard rate on stainless steel washers
AISI 304 Square Washer Chemical Composition
Being a reliable Stainless Steel 304 Washers Supplier in India, we test every batch for correct chemical composition
Per ASTM A240 / UNS S30400
Chromium
18.00–20.00%
Nickel
8.00–10.50%
Manganese
≤ 2.00%
Silicon
≤ 1.00%
Carbon
≤ 0.08%
Phosphorus
≤ 0.045%
Sulphur
≤ 0.030%
Iron
Balance
AISI 304 Washer Mechanical Properties
Annealed Condition
Tensile Strength (MPa)
≥ 515
Load Bearing
Yield Strength (MPa) (0.2%)
≥ 205
Design Limit
Elongation (50mm)
≥ 40%
Ductility
Hardness ≤
201 HB / 92 HRB
Wear Resistance
EN 1.4301 Lock Washers Equivalent Grades
ASTM / ASME
- A240 / SA240
- A276
- A182 F304
- A479
EN / DIN
- EN 10088-2
- 1.4301
- X5CrNi18-10
BS
- BS 1449
- 304S31
- BS EN 10088
JIS
- SUS 304
- JIS G4303
- JIS G3446
IS
- IS 6911
- Grade UNS S30400
- IS 1570 (Part 5)
GB
- GB/T 3280
- 06Cr19Ni10
- GB/T 20878
Application Of Stainless Steel 304 Machine Washer
As a well-known Stainless Steel 304 Washers Supplier in India, our washers perform reliably in every application
Food & Beverage Plants
Chemical & Petrochemical
HVAC & Refrigeration
Marine & Offshore Decks
Structural Steel Framing
Solar Panel Mounting
Pharma & Biotech Skids
Pump & Valve Assembly
Weekly Delivery Of Stainless Steel 304 Washers At Below Countries
| Export to | Continent | Port | Shipping Time in Days |
|---|---|---|---|
| Italy | Europe | Trieste | 30 |
| Germany | Europe | Hamburg Port | 20 |
| Spain | Europe | Valencia | 30 |
EN 1.4301 Spring Washer Test Certificates
Mill Test Certificate 3.1
Every AISI 304 Washer dispatch is issued with an EN 10204 3.1 Mill Test Certificate, traceable to the original heat number and cross-checked against ASTM A240 chemistry and mechanical limits before it leaves the factory.
INOX 304 Plain Washer Material Testing
PMI Testing
Positive Material Identification on every lot to confirm grade
Salt Spray Test
Corrosion resistance verified per ASTM B117
Dimensional Check
OD, ID & thickness verified against drawing tolerance
Hardness Test
Confirms annealed condition meets ASTM A240 limits
Visual & Surface Check
Screened for burrs, pitting & finish defects
Third-Party Inspection
TPI available on request for large export orders
304 Grade Fender Washers Offered Documentation
NABL Lab Report
Independent chemistry & mechanical test results
On Request
Packing List
Itemised piece count, weight & carton breakup
Every Order
Certificate Of Origin
For customs clearance & import duty processing
Export Orders
Commercial Invoice
PO-matched invoice with HSN & GST breakup
Every Order
SUS 304 Conical Washers Packaging
Poly Bag & Carton
Standard retail-ready packing for small orders
Wooden Pallet Box
For bulk quantities
Export Vacuum Pack
Moisture-sealed for long-transit sea freight
Custom Labelling
PO number, size & heat number marked per buyer requirement
Request A Quote →
Monthly Delivery Of Stainless Steel 304 Washers in Below Countries
| Export to | Continent | Port | Shipping Time in Days |
|---|---|---|---|
| Netherlands | Europe | Rotterdam | 30 |
| Egypt | Africa | Port Said | 18 |
| Nigeria | Africa | Lekki Deep | 30 |
| Kuwait | Asia | Shuwaikh | 10 |
Frequently Asked Questions
Is an AISI 304 Washer magnetic?
No. AISI 304 Washer Essentially non-magnetic Due to its Austenitic Structure.
What is A2-70 on a washer?
A2-70 is an ISO 3506 grade for 304 stainless steel with a minimum tensile strength of 700 MPa.
Can 304 Grade Washers be used outdoors?
Yes, for Atmospheric and Mildly Corrosive Outdoor Conditions.
What is the minimum order quantity?
Ganpat Industrial supplies from small trial lots to full container loads, share size and quantity for a factory-price.
Weekly Shipment To Below Cities
| California (USA) | Texas (USA) |
|---|---|
| Houston (USA) | Riyadh (Saudi Arabia) |
| Indiana (USA) | Al Khobar (Saudi Arabia) |
| Dubai (UAE) | Al Jubail (Saudi Arabia) |
| Abu Dhabi (UAE) | Dammam (Saudi Arabia) |
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