GB97 Washers
Product: PLAIN washer
Standard: GB/T 97 DIN125 SAE
Raw material: Low Carbon steel stainless steel .
Surface: Nickel plating etc..
Specification Range: M2-M64 customized products are available
Hardness: HV 100 HV140 HV200-300
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Product Introduction
Product: FLAT WASHER
Standard: DIN125 GB97 SAE Flat washers
Raw material: 08# 10# 45# ss304 ss316 .
Surface: Plain Black Zn‑Ni plating Nickel plating etc..
Specification Range: M2-M64
Hardness: HV 100 HV140 HV200-300
Product Overview
GB/T 97.1‑2002 defines standard‑series metric plain flat washers of product grade A, widely used under bolt heads and nuts to distribute clamping load, protect workpiece surfaces and reduce surface pressure. Nominal thread sizes cover M1.6 ~ M64.
Key Specifications
1,Standard: GB/T 97.1‑2002 (replaces GB 97‑85)
2,Product Grade: A (precision tolerance)
3,Hardness classes: 100HV / 140HV / 200HV / 300HV
4,Equivalent standards: ISO 7089, DIN 125‑A
5,Counterpart in US system: SAE flat washer
Surface Treatments
Zn‑Ni plating, black, hot-dip galvanizing (H.D.G), Nickel plating.
Specification Range
Metric:
M1.6-M64
Height:
0.3mm-11mm
Property Classes
Carbon steel:
08F/10# 45#
Stainless steel:
A2-70, A4-70 (paired with stainless steel bolts);
Hardness
HV100/140 HV200/300
Application Fields
General machinery, equipment assembly, steel structures, cabinets, automotive and general‑purpose fastener connections.
Main Functions
Spread compressive force over larger contact area
Prevent scratching or denting of mating parts
Compensate minor mounting gaps
Match with metric bolts & screws up to property class 8.8 / 10.9
Sales & Logistics
Markets:
N/A, EU, Asia-Pacific, and Middle East
Packaging:
bags, cartons, BOX bins pallets (customizable);
Orders:
Accepts bulk and small-batch purchases (negotiable delivery terms).
Quality Assurance
1.Raw material incoming inspection with material test certificates (MTC).
2.In‑line sampling for dimensions, hardness and surface condition.
3.Full inspection after surface finishing, free of burrs and coating defects.
4.Batch traceability available; inspection reports can be provided on request.
5.Strictly comply with GB/T 97.1‑2002 and related fastener standards.
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 50# / 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, GB97 DIN7091 SAE |
| Function | Distribute high preload, prevent indentation | Even load, surface protection |
Founded in 2005, our company has developed for more than 20 years into a key regional fastener manufacturer with full automated end‑to‑end production. Boasting 60 employees and an annual output value exceeding RMB 130 million, we supply mid‑to‑high‑end fastener solutions. Our products enjoy a solid reputation worldwide.
Our factory & quipment
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