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Heyco® Sealing Washers

  • Part Numbers and Specifications
  • Features
Will Fit These
Electrical
Fitting NPT
Trade Sizes
PART NO. DESCRIPTION PART DIMENSIONS CAD
Black A
Inside
Diameter
B
Outside
Diameter
C
Thickness
in. mm. in. mm. in. mm.
1/4 3258 SW 1/4 .54 13,7 .80 20,2 .13 3,2 CAD
3/8 3259 SW 3/8 .67 17,0 1.01 25,5 CAD
1/2 3260 SW 1/2 .85 21,6 1.24 31,5 CAD
3/4 3261 SW 3/4 1.03 26,2 1.50 38,1 .14 3,4 CAD
1 3262 SW 1 1.28 32,5 1.77 45,0 .18 4,6 CAD
1-1/4 3264 SW 1-1/4 1.66 42,2 2.16 54,8 .16 4,1 CAD
1-1/2 3265 SW 1-1/2 1.86 47,2 2.44 62,0  
2 3257 SW 2 2.32 58,9 2.93 74,4 .18 4,6  

Standard color black.

  • For use with Heyco-Flex fittings.
  • Liquid tight, dust tight, and oil tight at enclosure.
  • Suitable for wet locations requiring a separate gasket between the box and fitting.
  • Also suitable for other panel sealing applications.
  • Easy to install since washers seal off on the perimeter, not on the connector threads.
  • Special double sealing ridges compensate for minor unevenness at enclosure.

QuickSpecs

Material Thermoplastic Elastomer
Flammability Rating 94V-0
Temperature Range -22°F (30°C) to 221°F (105°C)
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