One Washer, Zero Failure – Why High-Heat Buyers Bet on Ganpat Industrial’s Stainless Steel 310 Washers ?
Zero Inspection Surprises
PMI • scaling test • dimensional – before it ships
Built For Heat, Not Just Load
High-chromium 310 heats rated for continuous high-temperature duty
Quote In 24 Hours
Ready stock on standard sizes – ships same week
Certified Raw Material
ISO 9001 • PED • Petrofac approved heats only
One Enquiry, Full Range
Flat • Lock • Spring • Sealing – all in one PO
Stainless Steel 310 Washer Snapshot
- 1Max Service Temp: Up to 1150°C continuous oxidation resistance
- 2Size Range: M2 to M36 • OD 5 mm to 66 mm
- 3Standards: ASME B18.22.1, DIN 125, DIN 127, ISO 7089, ISO 7090, ASTM A240
- 4Finish: Bright Annealed, Passivated, Polished, Natural Mill Finish
- 5Common Grades: UNS S31000, WNR 1.4841, AISI 310 / 310S
- 6Type: Flat, Lock, Spring, Sealing, Conical, Square, Star, Slot, Split, Round
Or call our Mumbai office: +91 22 6743 7134 • Fast dispatch on ready stock sizes
Ganpat Industrial Corporation forms its Stainless Steel 310 Washers from certified high-chromium UNS S31000 raw material, containing around 25% chromium and 20% nickel — nearly double the alloying content found in a standard 304 washer. That elevated chromium level builds a protective scale layer that keeps the washer structurally sound in conditions where ordinary austenitic grades would oxidize and flake away, which is precisely why furnace fabricators, kiln builders, and high-temperature process teams specify 310 washers rather than defaulting to 304 or 316. Each batch is blanked, formed, and tested in-house prior to dispatch. Based in Mumbai, Ganpat Industrial Corporation brings over 25 years of experience in stainless steel manufacturing, supplying customers across India, the UAE, and the Middle East with both ready stock and custom-sized washers.
Mumbai · Forging Manufacturer & Exporter
Stainless Steel 310 Washers Engineered To Outlast The Heat, Not Just The Load
Ganpat Industrial forges and supplies Stainless Steel 310 Washers for buyers who cannot risk a joint failing under heat – furnace builders, kiln fabricators and heat-treatment plants across India, the UAE and the Middle East.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
Trusted ASME B18.22.1 Flat Washers Manufacturer in India Offering PMI-checked testing to ensure consistent quality
Specification Of Stainless Steel 310 Washers
Stainless Steel 310 Flat Washer Size Range
- ID: M2 – M36
- OD: 5 – 66 mm
- Thickness: 0.3 – 5 mm
- Custom sizes on drawing
SS 310 Lock Washer Governing Standard
- ASME B18.22.1
- DIN 125 / DIN 127
- ISO 7089 / 7090 / 7091
- ASTM A240 / A276
ASTM A193 SS 310 Sealing Washer Production Route
- Precision Blanking
- CNC Punching
- Cold Forming (Spring/Lock)
- Deburring & Tumbling
UNS S31000 Split Washer Surface Finish
- Bright Annealed
- Passivated (ASTM A967)
- Polished
- Natural / Mill Finish
WNR 1.4841 Slot Washer Material Grade Traceability
- UNS S31000
- WNR 1.4841
- AISI 310 / 310S
- Heat-Number Marked
310 Stainless Steel Star Washer Testing
- PMI Testing
- Scaling / Oxidation Test
- Dimensional Check
- Third-Party Inspection
INOX 310 Square Washer Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
SUS 310 Spring Washer Packaging
- Poly Bags × Cartons
- Wooden Pallet Boxes
- Vacuum Pack (export)
- Custom Labelling
AISI 310 Conical Washer Origin
- Indian Origin
- Japanese Origin
- European Origin
- Traceable To Heat Number
ASTM A193 SS 310 Split Washer Test Certificates
Mill Test Certificate 3.1
Every SS 310 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.
UNS S31000 SS 310 Plain Washer is manufactured through precision blanking, cold forming and final Precise Surface Finish with Genuine MTC
SS 310 Lock Washer Surface Finish Techniques
Choose Stainless Steel 310 Washers Manufacturer in India offering multiple surface finish options
Natural Mill Finish
As-rolled, economical for hidden structural joints
Shot Blasting
Uniform matte finish, removes scale before coating
Bright Annealing
Mirror-bright, scale-free finish for visible joints
Electropolishing
Ultra-smooth surface for cleanroom & pharma joints
Pickling & Passivation
Removes embedded iron, restores full corrosion layer
Mechanical Polishing
Ra 0.4–0.8 µm for hygienic or decorative use
Buying In Bulk For A Project?Send your BOQ – factory price, MTC 3.1, dispatch same week.
ASTM A193 SS 310 Sealing Washer Manufacturing Process
Raw Material Inspection
PMI check on incoming 310 coil / sheet before it enters the line
Precision Blanking
Punched to ID / OD on CNC presses to buyer drawing
Cold Forming
Spring, lock, star & conical profiles shaped to spec
Deburring & Surface Finishing
Tumbled, passivated and visually inspected
Final Testing & Packing
Dimensional and PMI check before dispatch
Assorted Types Of SS 310 Washers
Stainless Steel 310 Flat Washer
ISO 7089
SS 310 Lock Washer
DIN 127
ASTM A193 SS 310 Sealing Washer
Bonded Seal
UNS S31000 Split Washer
Split Ring
WNR 1.4841 Slot Washer
Slotted
310 Stainless Steel Star Washer
Internal Tooth
INOX 310 Square Washer
Square Profile
SUS 310 Spring Washer
DIN 137
AISI 310 Conical Washer
DIN 6796
310 SS Round Washer
Plain Round
SS 310 Fender Washer
Wide OD
SUS 310 Wave Washer
Low-Profile Spring
Need A Custom SS 310 Washer Type Or Size?Share your drawing – get a factory-price quote within 24 hours.
UNS S31000 Split Washer Dimension Chart
Stainless Steel 310 Washers Supplier in India holding precise dimensional chart
Small
M2–M6
ID approx. 2.2–6.4mm • OD 5–12mm
Medium
M8–M16
ID approx. 8.4–17mm • OD 16–30mm
Large
M20–M36
ID approx. 21–37mm • OD 37–66mm
AISI 310 vs AISI 310S Countersunk Washer
AISI 310 Washer
- Carbon: ≤ 0.25%
- Tensile Strength: ≥ 560 MPa
- Hardness: ≤ 95 HRB
- Best Suited For: Kiln & Burner Use
AISI 310S Washer
- Carbon: ≤ 0.08%
- Tensile Strength: ≥ 515 MPa
- Hardness: ≤ 90 HRB
- Best Suited For: Petrochemical Tubing
WNR 1.4841 Slot Washer Weight Chart
| Size | Plain Punched Washer IS:2016 (kg) | Heavy Washer IS:6610 (kg) | Machined Washer IS:2016 (kg) | Spring Washer Flat Section IS:3063-72 (kg) | Spring Washer Square Section IS:6735-72 / DIN:7980 (kg) | Size (Inches) | Plain Punched Washer BS:3410 Table 7 (kg) | Machined High Strength Friction Grip For Channels IS:5372-75 (kg) | For I-Beam IS:5374-75 (kg) | Type-B Channels IS:6649-85 (kg) | Type-C I-Beams IS:6649-85 (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M-3 | – | – | – | – | – | – | – | 0.01 | 0.01 | – | – |
| M-4 | – | – | – | – | – | – | – | 0.02 | 0.02 | – | – |
| M-5 | 0.04 | – | 0.04 | – | – | – | – | 0.03 | 0.03 | – | – |
| M-6 | 0.11 | – | 0.11 | – | – | – | – | 0.08 | 0.04 | 1/4″ | 0.21 |
| M-8 | 0.20 | – | 0.21 | 1.10 | 1.20 | – | – | 0.16 | 0.11 | 5/16″ | 0.35 |
| M-10 | 0.39 | 1.60 | 0.40 | 1.00 | 1.10 | – | – | 0.25 | 0.20 | 3/8″ | 0.48 |
| M-12 | 0.58 | 1.90 | 0.62 | 2.00 | 2.20 | 2.00 | 1.80 | 0.38 | 0.23 | 1/2″ | 1.07 |
| M-14 | 0.82 | – | – | – | – | – | – | 0.60 | 0.38 | – | – |
| M-16 | 1.06 | 2.90 | 1.13 | 3.40 | 3.75 | 9.00 | 8.50 | 0.89 | 0.59 | 5/8″ | 1.85 |
| M-18 | 1.27 | – | – | – | – | – | – | 0.97 | 0.66 | – | – |
| M-20 | 1.64 | 4.40 | 1.72 | 5.80 | 6.70 | 8.50 | 8.00 | 1.52 | 1.23 | 3/4″ | 2.91 |
| M-22 | 1.75 | – | – | – | – | 7.50 | 7.00 | 1.65 | 1.36 | 7/8″ | 4.27 |
| M-24 | 3.11 | 6.30 | 3.30 | 13.50 | 16.00 | 6.50 | 6.00 | 2.62 | 1.81 | 1″ | 6.13 |
| M-27 | 3.94 | 8.00 | 4.23 | 12.50 | 15.00 | 12.00 | 11.50 | 2.87 | 2.06 | 1-1/8″ | 7.69 |
| M-30 | 5.05 | 10.10 | 5.36 | 16.50 | 18.70 | 17.50 | 16.00 | 4.43 | 3.20 | 1-1/4″ | 9.90 |
| M-33 | 7.10 | 12.00 | 7.54 | 21.00 | 23.50 | 23.00 | 22.50 | 6.30 | 3.50 | – | – |
| M-36 | 8.73 | 14.60 | 9.20 | 25.50 | 29.20 | 26.50 | 26.00 | 6.73 | 5.25 | 1-1/2″ | 17.24 |
| M-39 | 12.60 | 16.70 | 13.30 | 28.30 | 34.50 | – | – | 7.17 | 5.61 | – | – |
| M-42 | 17.50 | 20.10 | 18.30 | – | – | – | – | 11.10 | 8.00 | – | – |
| M-45 | 21.20 | 22.20 | 22.00 | – | – | – | – | 11.70 | 8.53 | – | – |
| M-48 | 28.40 | 26.00 | 29.40 | – | – | – | – | 12.30 | 9.00 | 2″ | 27.78 |
| M-52 | 31.90 | – | 33.00 | – | – | – | – | 18.20 | – | – | – |
| M-56 | 47.90 | – | – | – | – | – | – | 19.30 | – | – | – |
| M-60 | 51.60 | – | – | – | – | – | – | 20.30 | – | – | – |
| M-64 | 55.40 | – | – | – | – | – | – | 21.80 | – | – | – |
| M-68 | 57.40 | – | – | – | – | – | – | – | – | – | – |
| M-72 | 63.40 | – | – | – | – | – | – | 24.00 | – | – | – |
Cross-Checking A Grade For An Overseas Order?Send the buyer’s standard – we confirm the matching Ganpat spec sheet.
310 Stainless Steel Star Washer Price List Factors
◆Type (Flat / Lock / Spring)
◆Size & Thickness
◆Order Quantity
Get a live SS 310 Washer quote todayFactory price, ready stock on standard sizes, and no minimum order penalty on repeat buyers.
INOX 310 Square Washer HSN Code
Get correct HSN codes from our Stainless Steel 310 Washers Supplier in India for easy GST filing
GST Rate
18%
Standard rate on stainless steel washers
Spring / Lock Washer
7318 21 00
Non-threaded: spring & lock washers
HSN Heading
7318
Screws, bolts, nuts & washers of iron/steel
Flat / Plain Washer
7318 22 00
Non-threaded: other washers
SUS 310 Spring Washer Chemical Composition
IronFe
Balance
SiliconSi
≤ 1.50%
ChromiumCr
24.00–26.00%
SulphurS
≤ 0.030%
CarbonC
≤ 0.25%
NickelNi
19.00–22.00%
PhosphorusP
≤ 0.045%
ManganeseMn
≤ 2.00%
AISI 310 Conical Washer Mechanical Properties
Tensile Strength
≥ 515 MPa
Load Bearing
Yield Strength (0.2%)
≥ 205 MPa
Design Limit
Elongation (50mm)
≥ 40%
Ductility
Hardness
≤ 217 HB / 95 HRB
Wear Resistance
Stainless Steel 310 Washers Delivered Weekly To The Following Countries
| Export To | Countries | Continent | Shipping Time (Days) | Ports |
|---|---|---|---|---|
| Qatar | Asia | 7 | Doha | |
| Spain | Europe | 24 | Valencia | |
| South Korea | Asia | 9 | Busan | |
| Jordan | Asia | 9 | Aqaba | |
| Netherlands | Europe | 22 | Rotterdam |
Monthly Delivery Of Stainless Steel 310 Washers To Below Countries
| Export To | Countries | Continent | Shipping Time (Days) | Ports |
|---|---|---|---|---|
| Finland | Europe | 25 | Helsinki | |
| Italy | Europe | 23 | Genoa | |
| Mexico | North America | 32 | Veracruz | |
| Argentina | South America | 42 | Buenos Aires | |
| South Africa | Africa | 26 | Durban |
310 SS Round Washer Equivalent Grades
GB (China)
- 06Cr25Ni20
- GB/T 14976
- GB/T 20878
JIS (Japan)
- SUS 310 / 310S
- JIS G4303
- JIS G4305
BS (Britain)
- 310S31
- BS 970
- BS EN 10088
IS (India)
- Grade 310
- IS 6911
- IS 1570 (Part 5)
ASTM / ASME (USA)
- A240 / A276
- A182 F310
- UNS S31000
EN / DIN (Europe)
- WNR 1.4841
- X15CrNiSi25-21
- EN 10088-2
Stainless Steel 310 Lock Washer Operating Temperature
Continuous Service
Up To 1035°C
Sustained high-temperature duty
Intermittent Service
Up To 1150°C
Short-cycle furnace & kiln exposure
304 Scaling Onset
≈ 870°C
Where standard 304 starts to fail
Cryogenic Limit
Down To -196°C
Stays ductile at low temperature too
Application Of Stainless Steel 310 Plain Washers
Furnace & Kiln Fastening
Heat-Treatment Equipment
Boiler & Burner Assemblies
Exhaust & Flue Systems
Glass & Ceramic Kilns
Incinerator Components
High-Temp Flange Joints
Annealing Furnace Conveyors
WNR 1.4841 Square Washer 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
Frequently Asked Questions
What makes SS 310 better suited to high heat than 304 or 316?
Higher chromium and nickel keep the scale layer intact at temperatures where 304 or 316 oxidise.
Does WNR 1.4841 match UNS S31000 exactly?
Yes, same alloy, just under a different regional standard.
Will an SS 310 Washer respond to a magnet?
No, it is essentially non-magnetic in the annealed condition.
Can I place a small trial order before committing to bulk?
Yes, from trial lots to full container loads, no strict MOQ.
Call Now For A Free Sample, Which Can Be Arranged From The Cities Specified Below
| Singapore | Rotterdam (Netherlands) |
| Chicago (USA) | Doha (Qatar) |
| Sharjah (UAE) | Kuala Lumpur (Malaysia) |
| Manama (Bahrain) | Jubail (Saudi Arabia) |
| Hamburg (Germany) | New Jersey (USA) |
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