Heyco Products 3997 Datasheet & Stock

Plug electrical knock-outs.
Molded in silver gray color to resemble galvanized steel.
Install quickly with fingertip pressure (no tool required).
Economical.
Multiple trade sizes fit 1/2" to 2" knock-out holes.
Lock firmly in boxes up to 1/8" thick, except for Part Number 4002 (KOS 2) and Thick Panel Knock-Out Seals (KOST's), which lock firmly in boxes up to 1/4" thick.
Locking fingers in fractional increments up to the maximum panel thickness.
Approximate Head Thickness: .062" (1,6 mm). Thickness may vary.
To adapt a Knock-Out to accept a Heyco Strain Relief, see Heyco Knock-Out Adapters.