DIN6916 Washers
Product: HEAVY washer
Standard: DIN6916 F436M
Raw material: Carbon steel stainless steel .
Surface: Black Zinc plated HDG Teflon, Geomet, Dacromet, Phosphating, etc..
Specification Range: M12-M36 customized products are available
Hardness: HV 300–350, HV 430–530, HRC 26–45
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Product Introduction
Product: HEAVY WASHER
Standard: DIN6916 F436M GB1230
Raw material: 45# 50# 70# .
Surface: Black Zinc plated HDG Teflon, Geomet, Dacromet, Phosphating, etc..
Specification Range: M12-M36
Hardness: HRC 32–45 HV295-350
Product Overview
Heavy washers include flat, spring, and bevel types. They distribute load, prevent loosening, and cushion connections. Widely used in machinery, construction, auto and heavy engineering.
Key Specifications
Raw Materials
Carbon steel (45): Cost-effective for general loads and dry environments;
Stainless steel (304/A2, 316/A4): Corrosion-resistant, ideal for humid/acid-alkaline conditions;
Surface Treatments
zinc plated, black oxide, hot-dip galvanizing (H.D.G), Dacromet.
Specification Range
Metric:
M12-M36
Height:
3.7mm-6.6mm
Property Classes
Carbon steel:
General grade (10HV)
Stainless steel:
A2-70, A4-70 (paired with stainless steel bolts);
Application Fields
Heavy-duty hardened washers fit high-tension bolt connections. They spread heavy load, avoid base material damage and ensure stable clamping. Widely used in steel structures, heavy machinery, trucks and engineering equipment.
Usage Precautions
Match washers with high-strength bolts (10.9/12.9 grade).
Use hardened heavy washers only for structural joints.
Place flat side against the component for even load distribution.
Avoid mixing with thin standard washers in one assembly.
Check surface flatness; remove burrs before installation
Sales & Logistics
Markets:
North America, Europe, Asia-Pacific, and global industrial hubs;
Packaging:
Small bags, cartons, pallets iron bins wooden box (customizable);
Orders:
Accepts bulk and small-batch purchases (negotiable delivery terms).
Quality Assurance
- ISO9001/IATF 16949 API 20E certified; all products undergo dimensional and performance testing;
- Provides long-term quality guarantees and technical after-sales support.
FAQ: Key Flat washer vs. Heavy Washers what's the difference ?
| Feature | Heavy Duty Washer | Standard (Plain) Washer |
|---|---|---|
| Thickness | Thicker (≥3mm) | Thin (0.5–2mm) |
| Load Capacity | High load bearing | Light to medium load |
| Material | C45 / hardened steel | Mild steel / stainless |
| Hardness | 295–350 HV (HV10) | ≤200 HV typically |
| Application | Structural steel, heavy machinery | General assembly, electronics |
| Standard | DIN 6916, DIN 7349 | DIN 125, ISO 7089 |
| Function | Distribute high preload, prevent indentation | Even load, surface protection |
Established in 2005, our company has evolved over two decades of continuous development into a leading regional enterprise in the fastener industry with fully automated end-to-end production. With an annual output value exceeding RMB 130 million, our product range covers diverse market segments from mid-range to high-end and is distributed worldwide
Our factory & quipment
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