CMP Serrated Washers
CMP Serrated Washers

CMP 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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Metric Ordering

Reference

 Reference Diameter "A'" Minimum Thickness External Diameter "B'"

NPT

Ordering Reference 

 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 - - - -
Data Sheets
Serrated Washers