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Heyco Heyco® TPE Liquid Tight Hole Plugs

Heyco Heyco® TPE Liquid Tight Hole Plugs feature oil-tight, rain-tight, and submersible sealing options. These hole plugs are available in multiple nominal sizes that fit true-size mounting holes from 0.5" (12.7mm) to 1" (25.4mm). The TPE liquid-tight hole plugs offer three trade sizes to fit 1/2" to 1" knock-out holes. These hole plugs lock firmly in boxes with thicknesses from .03" (0.8mm) to .13" (3.2mm). The TPE liquid-tight hole plugs exhibit a 94V-0 flammability rating and operate over a temperature range of -60°C to 135°C. These hole plugs are UL certified for outdoor applications.

Features

  • Oil-tight, rain-tight, submersible sealing options
  • Multiple nominal sizes that fit true-size mounting holes from 0.5" (12.7mm) to 1" (25.4mm)
  • Three trade sizes fit 1/2" to 1" knock-out holes
  • Lock firmly in boxes from 0.03" (0.8mm) to 0.13" (3.2 mm) thickness
  • UL certified for outdoor applications
  • True sizes are UL recognized under Underwriters’ Laboratories File E51579 and CSA certified by Canadian Standard Association File 008919C
  • Trade sizes are UL listed under Underwriters’ Laboratories File E51579 and CSA certified by Canadian Standard Association File 081067C
  • 85 durometer santoprene-hardness 85 Shore A material
  • 94V-0 flammability rated
  • -60°C to 135°C operating temperature range

Dimension Diagram

Mechanical Drawing - Heyco Heyco® TPE Liquid Tight Hole Plugs

Additional Resources

Published: 2026-02-12 | Updated: 2026-02-12