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FULLERKREG DIN 7349 thick flat washers are manufactured to DIN 7349 standard in A2 stainless steel (SUS304) with a natural cleaned and passivated finish. DIN 7349 washers are specifically designed for use with bolts that have heavy-type spring pins (DIN 7346 / ISO 8752). They feature a larger outer diameter and greater thickness than standard DIN 125 flat washers, providing a larger bearing surface and superior load distribution in demanding assemblies. A2 stainless steel offers excellent corrosion resistance for general industrial, food processing, and outdoor applications.
All dimensions in millimeters (mm). Tolerances per DIN 7349.
| Nominal Size (d) | Inner Dia. d1 | Outer Dia. d2 | Thickness h | Weight (g/100 pcs) |
|---|---|---|---|---|
| M5 | 5.3 | 15 | 2.0 | 114 |
| M6 | 6.4 | 18 | 2.5 | 214 |
| M8 | 8.4 | 24 | 3.0 | 495 |
| M10 | 10.5 | 30 | 3.5 | 1,040 |
| M12 | 13.0 | 37 | 4.0 | 2,100 |
| M16 | 17.0 | 50 | 5.0 | 5,800 |
| M20 | 21.0 | 60 | 6.0 | 12,400 |
| M24 | 25.0 | 72 | 6.0 | 20,600 |
* All dimensions conform to DIN 7349. Please verify with your engineering team for critical applications.
| Property | Value |
|---|---|
| Material Grade | A2 / SUS304 / 1.4301 |
| Steel Group | Austenitic |
| Property Strength Class | 50, 70 |
| Tensile Strength (Rm) | ≥ 500 MPa (Class 50) / ≥ 700 MPa (Class 70) |
| Dia. Range for Class | ≤ M39 (Class 50) / ≤ M39 (Class 70) |
| Hardness (HV) | ≤ 250 HV |
| Density | 7.93 g/cm³ |
| Magnetic | Non-magnetic (austenitic) |
| Operating Temperature | -196°C to +300°C |
| RoHS / REACH | Compliant |
Per DIN EN ISO 3506-1. Strength class marking: A2-50 or A2-70.
| Element | C (max) | Cr | Ni | Mn (max) | Si (max) | P (max) | S (max) |
|---|---|---|---|---|---|---|---|
| Content (%) | 0.07 | 17.5 – 19.5 | 8.0 – 10.5 | 2.0 | 1.0 | 0.045 | 0.030 |
Per DIN EN ISO 3506-1, A2 stainless steel washers are available in the following strength classes:
| Steel Group | Grade | Strength Class | Made From | Characteristics |
|---|---|---|---|---|
| Austenitic | A2 | 50 | A1, A2 | Soft annealed, bored and soft pressed types; tensile strength ≥ 500 MPa; dia. ≤ M39 |
| A2 | 70 | A2, A4 | Cold worked, normal strength; tensile strength ≥ 700 MPa; dia. ≤ M39; with anti-pitting treatment |
| Feature | DIN 7349 | DIN 125 |
|---|---|---|
| Type | Thick flat washer (heavy type) | Standard flat washer |
| Outer Diameter | Larger (extra-wide bearing surface) | Standard |
| Thickness | Greater (heavy duty) | Standard |
| Designed for | Bolts with heavy spring pins (DIN 7346) | General-purpose bolts & screws |
| Load Distribution | Superior — wider bearing area | Standard |
| Application | Heavy machinery, structural, high-vibration | General assembly |
Real product images — FULLERKREG DIN 7349 Thick Flat Washer, A2 Stainless Steel:
| [ Photo 1 ] | [ Photo 2 ] | [ Photo 3 ] | [ Photo 4 ] |
| Size | Standard Pack (pcs) | Bulk Carton (pcs) | Weight per 100 pcs (approx.) |
|---|---|---|---|
| M5 | 100 | 5,000 | ~114 g |
| M6 | 100 | 3,000 | ~214 g |
| M8 | 50 | 2,000 | ~495 g |
| M10 | 50 | 1,000 | ~1,040 g |
| M12 | 25 | 500 | ~2,100 g |
| M16 | 25 | 200 | ~5,800 g |
| M20 | 10 | 100 | ~12,400 g |
| M24 | 10 | 50 | ~20,600 g |
Custom packaging and labeling available for OEM / wholesale orders. Contact FULLERKREG for bulk pricing.
Q: What is DIN 7349 and how does it differ from DIN 125?
A: DIN 7349 is a thick flat washer standard designed specifically for use with bolts that have heavy-type spring pins (DIN 7346). Compared to DIN 125, DIN 7349 washers have a larger outer diameter and greater thickness, providing a wider bearing surface and better load distribution in heavy-duty applications.
Q: What does A2 stainless steel mean?
A: A2 refers to austenitic stainless steel grade 304 (SUS304 / 1.4301) per ISO 3506. It contains approximately 18% chromium and 8% nickel, offering excellent corrosion resistance in most atmospheric and freshwater environments. It is non-magnetic and suitable for food-contact applications.
Q: Is A2 stainless suitable for outdoor use?
A: Yes. A2 stainless steel provides excellent corrosion resistance in outdoor atmospheric conditions, fresh water, and mild chemical environments. For seawater or chloride-rich environments, A4 (SUS316) is recommended.
Q: Are these washers RoHS compliant?
A: Yes. FULLERKREG A2 stainless steel washers are fully RoHS and REACH compliant. Compliance documentation is available upon request.
Q: Can I order mixed sizes?
A: Yes. FULLERKREG supports mixed-size wholesale orders. Please contact us with your size breakdown and quantities for a custom quotation.
Q: Do you provide material test certificates?
A: Yes. Mill certificates, chemical composition reports, and dimensional inspection reports are available for all orders upon request.
FULLERKREG Fasteners — Precision DIN Standard Fasteners, Direct from Manufacturer.
For wholesale inquiries, technical questions, or custom orders, please contact our sales team.
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