Heyco Conduit, Tubing & Fittings Sealing Washers
Sealing Washers

Material: Thermoplastic Elastomer

Flammability Rating: 94V-0

Material Temperature Index: 125°C (257°F)–Max. temperature on part not to exceed 105°C (221°F)

  • 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.
 
Heyco® Sealing Washers
Will Fit These
Electrical Fitting
NPT Trade Sizes
Part
Number
Description Part Dimensions
A
Inside Diameter
B
Outside Diameter
C
Thickness
Black in. mm. in. mm. in. mm.
1/4 3258 SW 1/4   .54 13,7   .80 20,2 .13 3,2
3/8 3259 SW 3/8   .67 17,0 1.01 25,7
1/2 3260 SW 1/2   .85 21,6 1.24 31,5
3/4 3261 SW 3/4 1.03 26,2 1.50 38,1 .14 3,4
1 3262 SW 1 1.28 32,5 1.77 45,0 .18 4,6
1-1/4 3264 SW 1-1/4 1.66 42,2 2.16 54,9 .16 4,1
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