Products > Shake-Proof Serrated Washers

Shake-Proof Serrated Washers

Accessories for cable glands, available in stainless steel

Description

Technical

‘Shake-proof’ serrated washers

Available in Stainless Steel, these ‘shake-proof’ Serrated Washers are fitted internally to the equipment before a locknut and act as an anti-vibration device to prevent the Cable Gland or accessory from inadvertently loosening in service.

Self-loosening should be avoided according to clause 6.4.1 of IEC 60079-14, this can occur through relative motion over time even without vibration, due to differential thermal effects caused as a result of either differences in temperature or differences in clamped materials. 

Product Table

Metric

Metric Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B” NPT Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B”
16SW4 M16 3.9 25.5 050NPTSW4 1/2″” NPT 3.9 32.5
20SW4 M20 3.9 32.5 075NPTSW4 3/4″ NPT 3.9 40.0
25SW4 M25 3.9 40.0 100NPTSW4 1″” NPT 3.9 43.5
32SW4 M32 3.9 43.5 125NPTSW4 1 1/4″” NPT 3.9 64.5
40SW4 M40 3.9 64.5 150NPTSW4  1 1/2″ NPT 3.9 80.0
50SW4 M50 3.9 80.0 200NPTSW4 2″” NPT 3.9 100.0
63SW4 M63 3.9 100.0 250NPTSW4 2 1/2″” NPT 3.9 112.0
75SW4 M75 4.1 112.0 300NPTSW4 3″” NPT 4.1 135.0
90SW4 M90 4.1 135.0 350NPTSW4 3 1/2″” NPT 4.1 145.0
100SW4 M100 4.1 145.0

Imperial

Metric Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B” NPT Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B”
16SW4 M16 0.154 1.004 050NPTSW4  1/2″ NPT 0.154 1.28
20SW4 M20 0.154 1.28 075NPTSW4 3/4″ NPT 0.154 1.575
25SW4 M25 0.154 1.575 100NPTSW4 1″” NPT 0.154 1.713
32SW4 M32 0.154 1.713 125NPTSW4 1 1/4″” NPT 0.154 2.539
40SW4 M40 0.154 2.539 150NPTSW4 1 1/2″” NPT 0.154 3.15
50SW4 M50 0.154 3.15 200NPTSW4 2″” NPT 0.154 3.937
63SW4 M63 0.154 3.937 250NPTSW4 2 1/2″” NPT 0.154 4.409
75SW4 M75 0.161 4.409 300NPTSW4 3″” NPT 0.161 5.315
90SW4 M90 0.161 5.315 350NPTSW4 3 1/2″” NPT 0.161 5.709
100SW4 M100 0.161 5.709

Download Spec Sheet

Download

Technical

‘Shake-proof’ serrated washers

Available in Stainless Steel, these ‘shake-proof’ Serrated Washers are fitted internally to the equipment before a locknut and act as an anti-vibration device to prevent the Cable Gland or accessory from inadvertently loosening in service.

Self-loosening should be avoided according to clause 6.4.1 of IEC 60079-14, this can occur through relative motion over time even without vibration, due to differential thermal effects caused as a result of either differences in temperature or differences in clamped materials. 

Product Table

Metric

Metric Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B” NPT Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B”
16SW4 M16 3.9 25.5 050NPTSW4 1/2″” NPT 3.9 32.5
20SW4 M20 3.9 32.5 075NPTSW4 3/4″ NPT 3.9 40.0
25SW4 M25 3.9 40.0 100NPTSW4 1″” NPT 3.9 43.5
32SW4 M32 3.9 43.5 125NPTSW4 1 1/4″” NPT 3.9 64.5
40SW4 M40 3.9 64.5 150NPTSW4  1 1/2″ NPT 3.9 80.0
50SW4 M50 3.9 80.0 200NPTSW4 2″” NPT 3.9 100.0
63SW4 M63 3.9 100.0 250NPTSW4 2 1/2″” NPT 3.9 112.0
75SW4 M75 4.1 112.0 300NPTSW4 3″” NPT 4.1 135.0
90SW4 M90 4.1 135.0 350NPTSW4 3 1/2″” NPT 4.1 145.0
100SW4 M100 4.1 145.0

Imperial

Metric Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B” NPT Ordering Reference (Stainless Steel) Reference Diameter “A” Minimum Thickness External Diameter “B”
16SW4 M16 0.154 1.004 050NPTSW4  1/2″ NPT 0.154 1.28
20SW4 M20 0.154 1.28 075NPTSW4 3/4″ NPT 0.154 1.575
25SW4 M25 0.154 1.575 100NPTSW4 1″” NPT 0.154 1.713
32SW4 M32 0.154 1.713 125NPTSW4 1 1/4″” NPT 0.154 2.539
40SW4 M40 0.154 2.539 150NPTSW4 1 1/2″” NPT 0.154 3.15
50SW4 M50 0.154 3.15 200NPTSW4 2″” NPT 0.154 3.937
63SW4 M63 0.154 3.937 250NPTSW4 2 1/2″” NPT 0.154 4.409
75SW4 M75 0.161 4.409 300NPTSW4 3″” NPT 0.161 5.315
90SW4 M90 0.161 5.315 350NPTSW4 3 1/2″” NPT 0.161 5.709
100SW4 M100 0.161 5.709