Washer Types
Flat Washers
Standard flat washers for load distribution
Spring Washers
Lock washers to prevent loosening
Fender Washers
Extra-large OD for soft materials
Spherical Washers
For angular applications
Square Washers
Square profile for timber construction
Tab Washers
Bent tabs lock bolt heads
Standards
| Type | Standard | Description |
|---|---|---|
| Flat Washers | ASME B18.22.1 | Plain washers |
| Flat Washers | ISO 7089 | Normal series |
| Spring Washers | DIN 127 | Lock washers |
| Spring Washers | ISO 7980 | Spring washers |
| Hardened Washers | ASTM F436 | Structural hardened washers |
Materials
Carbon Steel
Plain, zinc plated, hot-dip galvanized
Stainless Steel
304, 316, 321, 347 grades
Hardened Steel
ASTM F436 structural washers
Exotic Alloys
Duplex, Monel, Inconel, Hastelloy