ISO 7091 Plain Flat Washers
ISO 7091 Standard specifies the characteristics
of normal-series,
product-grade-C plain washers
in the 100 HV hardness class and of nominal sizes (nominal thread diameters) ranging from 1,6 mm to 64 mm
inclusive.
Washers of hardness class 100 HV are suitable for
- Hexagon bolts and screws of product grade C in property classes up to and including 6.8;
- Hexagon nuts of product grade C in property classes up to and including 6;
- Case-hardened thread rolling screws.
When soft material pieces are clamped, or large clearance holes in the workpiece are used, the user should check the technical suitability of this type of washer.
ISO 7091 Equivalents
DIN 126 PN 82005 UNI 6593 CSN 7091
Plain Washers
ISO 7091 Dimensions
| Nominal size | d1 | d2 | h | ||||
|---|---|---|---|---|---|---|---|
| min. | max. | max. | min. | Nominal | max. | min. | |
| 1.6 | 1.8 | 2.05 | 4 | 3.25 | 0.3 | 0.4 | 0.2 |
| 2 | 2.4 | 2.65 | 5 | 4.25 | 0.3 | 0.4 | 0.2 |
| 2.5 | 2.9 | 3.15 | 6 | 5.25 | 0.5 | 0.6 | 0.4 |
| 3 | 3.4 | 3.7 | 7 | 6.1 | 0.5 | 0.6 | 0.4 |
| 4 | 4.5 | 4.8 | 9 | 8.1 | 0.8 | 1 | 0.6 |
| 5 | 5.5 | 5.8 | 10 | 9.1 | 1 | 1.2 | 0.8 |
| 6 | 6.6 | 6.96 | 12 | 10.9 | 1.6 | 1.9 | 1.3 |
| 8 | 9 | 9.36 | 16 | 14.9 | 1.6 | 1.9 | 1.3 |
| 10 | 11 | 11.43 | 20 | 18.7 | 2 | 2.3 | 1.7 |
| 12 | 13.5 | 13.93 | 24 | 22.7 | 2.5 | 2.8 | 2.2 |
| 16 | 17.5 | 17.93 | 30 | 28.7 | 3 | 3.6 | 2.4 |
| 20 | 22 | 22.52 | 37 | 35.4 | 3 | 3.6 | 2.4 |
| 24 | 26 | 26.52 | 44 | 42.4 | 4 | 4.6 | 3.4 |
| 30 | 33 | 33.62 | 56 | 54.1 | 4 | 4.6 | 3.4 |
| 36 | 39 | 40 | 66 | 64.1 | 5 | 6 | 4 |
| 42 | 45 | 46 | 78 | 76.1 | 8 | 9.2 | 6.8 |
| 48 | 52 | 53.2 | 92 | 89.8 | 8 | 9.2 | 6.8 |
| 56 | 62 | 63.2 | 105 | 102.8 | 10 | 11.2 | 8.8 |
| 64 | 70 | 71.2 | 115 | 112.8 | 10 | 11.2 | 8.8 |
ASME Material Specifications
ASTM A693 Washers
ASTM F436/F436M
Washers
ASTM
F959/959M Direct Tension Squirter DTI Washers
ASTM
F2437/2437M Direct Tension Squirter DTI Washers
ASTM F844 Washers
ISO 898-3 Washers
ASTM A36 Washers
ASTM A240
Washers, Spacer, Flange
ASTM B96 Washers
ASTM B127 Washers
ASTM B162 Washers
ASTM B168 Washers
ASTM B171 Washers
ASTM B265 Washers
ASTM B409 Washers
ASTM B424 Washers
ASTM B551 Washers
ASTM B708 Washers
EN Material Specifications
ISO Material Specifications