Serrated Washers
Available in Stainless Steel as standard, these "shake-proof" Serrated Washers fitted internally to the equipment and before a locknut act as an anti-vibration device to prevent the cable gland or other cable entry device and locknut arrangement from inadvertently loosening in service.
Note: Alternative materials are also available. Please refer to Table "E" of the Ordering References page detailed below. e.g. 20SW4 for M20 Stainless Steel Serrated Washer, 050NPTSW4 for 1/2" NPT Stainless Steel Serrated Washer.
Metric Serrated Washers Table
- View Metric Table
- View Imperial Table
| Metric - Serrated Washers | |||
|---|---|---|---|
| Ordering Reference (Plated Steel) |
Reference Diameter | Minimum Thickness | External Diameter |
| 16SW | M16 | 3.7 | 25.5 |
| 20SW | M20 | 3.9 | 32.5 |
| 25SW | M25 | 3.9 | 40.0 |
| 32SW | M32 | 3.9 | 43.5 |
| 40SW | M40 | 3.9 | 64.5 |
| 50SW | M50 | 3.9 | 80.0 |
| 63SW | M63 | 3.9 | 100.0 |
| 75SW | M75 | 3.9 | 112.0 |
| 90SW | M90 | 4.1 | 135.0 |
| 100SW | M100 | 4.1 | 144.6 |
| 150SW | M115 | 4.1 | 159.0 |
| Dimensions are displayed in millimetres unless otherwise stated | |||
| Ordering Reference (Brass) | Reference Diameter "A" | Minimum Thickness | External Diameter "B" |
|---|---|---|---|
| 16SW | M16 | 0.144 | 0.995 |
| 20SW | M20 | 0.152 | 1.268 |
| 25SW | M25 | 0.152 | 1.560 |
| 32SW | M32 | 0.152 | 1.697 |
| 40SW | M40 | 0.152 | 2.516 |
| 50SW | M50 | 0.152 | 3.120 |
| 63SW | M63 | 0.152 | 3.900 |
| 75SW | M75 | 0.152 | 4.368 |
| 90SW | M90 | 0.159 | 5.265 |
| 100SW | M100 | 0.159 | 5.639 |
| 115SW | M115 | 0.159 | 6.201 |
| All dimensions are in inches unless otherwise stated | |||
NPT Serrated Washers Table
- View Metric Table
- View Imperial Table
| NPT - Serrated Washers | |||
|---|---|---|---|
| Ordering Reference (Plated Steel) | Reference Diameter | Minimum Thickness | External Diameter |
| 050NPTSW | 1/2" NPT | 3.9 | 32.5 |
| 075NPTSW | 3/4" NPT | 3.9 | 40.0 |
| 100NPTSW | 1" NPT | 3.9 | 43.5 |
| 125NPTSW | 1-1/4" NPT | 3.9 | 64.5 |
| 150NPTSW | 1-1/2" NPT | 3.9 | 80.0 |
| 200NPTSW | 2" NPT | 3.9 | 100.0 |
| 250NPTSW | 2-1/2" NPT | 3.9 | 112.0 |
| 300NPTSW | 3" NPT | 4.1 | 135.0 |
| 350NPTSW | 3-1/2" NPT | 4.1 | 144.6 |
| 400NPTSW | 4" NPT | 4.1 | 159.0 |
| Dimensions are displayed in Millimetres unless otherwise stated | |||
| Ordering Reference (Brass) | Reference Diameter "A" | Minimum Thickness | External Diameter "B" |
|---|---|---|---|
| 050NPTSW | 1/2" NPT | 0.152 | 1.268 |
| 075NPTSW | 3/4" NPT | 0.152 | 1.560 |
| 100NPTSW | 1" NPT | 0.152 | 1.697 |
| 125NPTSW | 1-1/4" NPT | 0.152 | 2.516 |
| 150NPTSW | 1-1/2" NPT | 0.152 | 3.120 |
| 200NPTSW | 2" NPT | 0.152 | 3.900 |
| 250NPTSW | 2-1/2" NPT | 0.152 | 4.368 |
| 300NPTSW | 3" NPT | 0.159 | 5.265 |
| 350NPTSW | 3-1/2" NPT | 0.159 | 5.639 |
| 400NPTSW | 4" NPT | 0.159 | 6.201 |
| All dimensions are in inches unless otherwise stated | |||
Additional information
CMP WP SerratedWashers_0310 Issue 1
