316 & 316L stainless steel washer
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Looking for 316 or 316L stainless steel washers with excellent corrosion resistance, reliable dimensions, and consistent quality? GNEE supplies stainless steel washers for industrial fastening, machinery, marine equipment, chemical processing systems, and construction projects.
We can support your purchasing requirements for standard and custom stainless steel washers, including flat washers, plain washers, large-diameter washers, and made-to-order dimensions. Buyers can specify the material grade, washer dimensions, applicable standard, surface finish, quantity, and inspection requirements to match their assembly conditions.
What are 316 and 316L stainless steel washers?
316 stainless steel washers are made from molybdenum-bearing austenitic stainless steel, which offers superior resistance to chloride-induced corrosion compared to standard 304 stainless steel washers. 316L stainless steel washers have a maximum carbon content of 0.030%, making them particularly well-suited for welded components and applications that require high resistance to intergranular corrosion.
What is the difference between 316 and 316L stainless steel washers?
The primary difference is carbon content. 316 has a maximum carbon content of 0.08%, while 316L has a maximum of 0.030%. Both contain approximately 2–3% molybdenum and provide good resistance to chloride-related corrosion. 316L is generally preferred for welded assemblies.
316 & 316L stainless steel washer Chemical Composition (wt%)
| Element | 316 (UNS S31600) | 316L (UNS S31603) |
| Carbon (C) | ≤ 0.08% | ≤ 0.03% |
| Chromium (Cr) | 16.0 – 18.0% | 16.0 – 18.0% |
| Nickel (Ni) | 10.0 – 14.0% | 10.0 – 14.0% |
| Molybdenum (Mo) | 2.0 – 3.0% | 2.0 – 3.0% |
| Manganese (Mn) | ≤ 2.0% | ≤ 2.0% |
| Silicon (Si) | ≤ 0.75% | ≤ 0.75% |
| Phosphorus (P) | ≤ 0.045% | ≤ 0.045% |
| Sulfur (S) | ≤ 0.030% | ≤ 0.030% |
| Nitrogen (N) | ≤ 0.10% | ≤ 0.10% |
316 & 316L stainless steel washer Mechanical Properties (Annealed Condition)
| Property | 316 | 316L |
| Tensile Strength (min) | 75 ksi (515 MPa) | 70 ksi (485 MPa) |
| Yield Strength 0.2% (min) | 30 ksi (205 MPa) | 25 ksi (170 MPa) |
| Elongation (min) | 35–40% | 40% |
| Hardness (max) | 217 HB / 95 HRB | 217 HB / 95 HRB |
| Density | 0.29 lb/in³ (7.99 g/cm³) | 0.29 lb/in³ (7.99 g/cm³) |
316 & 316L stainless steel washer Dimensional Standards (Washer Forms)
| Form | Standard | Description |
| Form A (Regular) | DIN 125-A / ISO 7089 | Standard flat washer |
| Form B (Large OD) | DIN 9021 / ISO 7093 | For soft mating surfaces |
| Form C (Heavy) | DIN 7349 / ISO 7094 | For slotted holes / structural |
| Spring / Split | DIN 127 / ASME B18.21.1 | Helical anti-vibration |
| Tooth Lock | DIN 6797 / 6798 | Internal / external anti-rotation |
Metric Dimensional Specifications: Standard Plain Washers
Reference: DIN 125 Type A / ISO 7089 – Standard Plain Washers (Without Chamfer)
|
Nominal Bolt Size |
Inner Diameter \(d_1\) (mm) |
Outer Diameter \(d_2\) (mm) |
Thickness \(s\) (mm) |
Approx. Weight (kg/1,000 pcs) |
|---|---|---|---|---|
|
M3 |
3.2 (+0.2/−0) |
7.0 (−0.36) |
0.5 (±0.05) |
0.12 |
|
M4 |
4.3 (+0.2/−0) |
9.0 (−0.36) |
0.8 (±0.08) |
0.31 |
|
M5 |
5.3 (+0.2/−0) |
10.0 (−0.36) |
1.0 (±0.10) |
0.44 |
|
M6 |
6.4 (+0.22/−0) |
12.0 (−0.43) |
1.6 (±0.15) |
1.14 |
|
M8 |
8.4 (+0.22/−0) |
16.0 (−0.43) |
1.6 (±0.15) |
1.83 |
|
M10 |
10.5 (+0.27/−0) |
20.0 (−0.52) |
2.0 (±0.20) |
3.57 |
|
M12 |
13.0 (+0.27/−0) |
24.0 (−0.52) |
2.5 (±0.20) |
6.27 |
|
M14 |
15.0 (+0.27/−0) |
28.0 (−0.52) |
2.5 (±0.20) |
8.62 |
|
M16 |
17.0 (+0.27/−0) |
30.0 (−0.52) |
3.0 (±0.30) |
11.30 |
|
M18 |
19.0 (+0.33/−0) |
34.0 (−0.62) |
3.0 (±0.30) |
14.70 |
|
M20 |
21.0 (+0.33/−0) |
37.0 (−0.62) |
3.0 (±0.30) |
17.20 |
|
M24 |
25.0 (+0.33/−0) |
44.0 (−0.62) |
4.0 (±0.30) |
32.30 |
|
M30 |
31.0 (+0.39/−0) |
56.0 (−0.74) |
4.0 (±0.30) |
53.60 |
Inch (Imperial) Dimensional Specifications
Reference: ASME B18.21.1 / ASME B18.22.1 – Dimensions in Inches
|
Nominal Size |
Bolt Diameter (in.) |
SAE (Narrow/Light OD): ID × OD × Thk (in.) |
USS (Wide/Heavy OD): ID × OD × Thk (in.) |
|---|---|---|---|
|
1/4" |
0.250" |
0.281" × 0.625" × 0.065" |
0.312" × 0.734" × 0.065" |
|
5/16" |
0.312" |
0.344" × 0.688" × 0.065" |
0.375" × 0.875" × 0.083" |
|
3/8" |
0.375" |
0.406" × 0.812" × 0.065" |
0.438" × 1.000" × 0.083" |
|
1/2" |
0.500" |
0.531" × 1.062" × 0.095" |
0.562" × 1.375" × 0.109" |
|
5/8" |
0.625" |
0.656" × 1.312" × 0.095" |
0.688" × 1.750" × 0.134" |
|
3/4" |
0.750" |
0.812" × 1.469" × 0.134" |
0.812" × 2.000" × 0.148" |
|
1" |
1.000" |
1.062" × 2.000" × 0.134" |
1.062" × 2.500" × 0.165" |
Technical Note: The dimensions and tolerances above are reproduced from the supplied reference data. Before using these tables for contractual specifications or production, verify the applicable standard edition, washer series, and dimensional tolerances. DIN 125 and ISO 7089 should not automatically be treated as interchangeable in every dimensional detail.
Applications of 316 & 316L Stainless Steel Washers
| Industry | Typical Applications |
|---|---|
| Marine engineering | Deck fittings, equipment supports, coastal structures |
| Chemical processing | Tanks, pumps, pipe supports, equipment assemblies |
| Food and beverage | Processing equipment, storage systems, machine assemblies |
| Pharmaceutical equipment | Equipment frames and process-system assemblies |
| Oil and gas | Pipeline supports, valves, and equipment fastening |
| Construction | Coastal building structures and outdoor fastening |
| Water treatment | Pumps, filtration equipment, and pipe assemblies |
316 & 316L stainless steel washer Price
The price for 316 and 316L stainless steel washers typically ranges from $0.01 to $0.67 per piece (for standard retail-grade or marine-grade fasteners); based on raw material costs, the price is approximately $4.50 to $7.00 per kilogram.
• General/Bulk Fasteners: When sourced through GNEE, prices range from $0.01 to $0.50 per piece, depending on the size and order quantity.
• Marine-Grade 316 Flat Washers, Fender Washers, and Lock Washers: When sourced from suppliers such as Fair Wind Fasteners, prices range from $0.05 to $0.67 per piece.
• Specialty/Thick Washers: When sourcing custom or heavy-duty, extra-thick washers (e.g., 1/8 inch or greater in thickness) through GNEE, the price is $3.90 to $4.10 per piece.
Contact GNEE for a quotation on 316/316L stainless steel washers. Send us your drawing or required dimensions to check material availability, manufacturing options, and delivery arrangements.
What GNEE Can Support
Material selection: AISI 316, AISI 316L, and dual-certified material options, subject to material availability and certification.
Custom dimensions: ID, OD, thickness, and profile based on customer drawings.
Surface requirements: Pickled, passivated, polished, or other agreed surface conditions.
Material documentation: MTC and traceability documentation according to the order requirements.
Quality inspection: Dimensional checks, visual inspection, and agreed material verification.
Export packaging: Moisture-resistant and protective packaging suitable for international transportation.
