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Serrated Washers Accessories for cable glands, available in stainless steel

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‘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.

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NPT Ordering Reference (Stainless Steel)Reference Diameter 'A'Minimum ThicknessExternal Diameter 'B'
050NPTSW4½” NPT0.151.28
075NPTSW4¾” NPT0.151.57
100NPTSW41” NPT0.151.71
125NPTSW41¼” NPT0.152.54
150NPTSW41 ½” NPT0.153.15
200NPTSW42” NPT0.153.94
250NPTSW42 ½” NPT0.154.41
300NPTSW43” NPT0.165.31
350NPTSW43 ½” NPT0.165.71
400NPTSW44” NPT0.167.28
Metric Ordering Reference (Stainless Steel)Reference Diameter 'A'Minimum ThicknessExternal Diameter 'B'
16SW4M160.151.00
20SW4M200.151.28
25SW4M250.151.57
32SW4M320.151.71
40SW4M400.152.54
50SW4M500.153.15
63SW4M630.153.94
75SW4M750.164.41
90SW4M900.165.31
100SW4M1000.165.71