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Heyco® Knock-out Seals

Heyco® Knock-out Seals Underwriters' LaboratoriesRecognized under the Components Program of Underwriters' Laboratories File #E-15331
Canadian Standards AssociationCertified by Canadian Standards Association File #LR-8919
  • Plugs electrical knock-outs.
  • Molded in gray color to resemble galvanized steel.
  • Six trade sizes fit 1/2" to 2" knock-out holes.
  • Knock out seals lock firmly in boxes up to 1/8" thick (1/4" thick for KOS 2).
  • Installs quickly with fingertip pressure (no tool required).
  • Knock out seals are economical.
  • Molded of type 6/6 nylon.  ASTM D-4066; flammability classification 94V-2; temperature index 125?C.
Chassis Dimensions       Part Dimensions
Maximum
Thickness
Mounting
Hole
Diameter
Trade Size Part No. Description B Head
Diameter
C Overall
Height
in.       mm. in.       mm. in.        mm. in.        mm.
.125        3,2 .875        22,2 1/2 3997 KOS 1/2 1.015       25,8 .453          11,5
.125        3,2 1.093      27,8 3/4 3998 KOS 3/4 1.218       31,0 .453          11,5
.125        3,2 1.375      34,9 1 3999 KOS 1 1.500       38,1 .453          11,5
.125        3,2 1.750      44,5 1-1/4 4000 KOS 1-1/4 1.906       48,4 .453          11,5
.125        3,2 2.000      50,8 1-1/2 4001 KOS 1-1/2 2.140       54,4 .453          11,5
.250        6,4 2.500      63,5 2 4002 KOS 2 2.750       69,9 .750          19,1
Standard Color:  Silver Gray.

Heyco® Knock-out Seals
Heyco?Liquid Tight Knock-out Seals

Heyco®Liquid Tight Knock-out Seals Underwriters' LaboratoriesListed under Underwriters' Laboratories File #E-28430
Canadian Standards AssociationCertified by Canadian Standards Association File #LR-81067
  • Oil tight, rain tight, submersible knock out seals.
  • Three trade sizes fit 1/2" to 1" knock-out holes.
  • Locks firmly in boxes from .030" (0,8mm) to .125" (3,2mm) thick.
  • Install knock out seals quickly with fingertip pressure (no tool required).
  • Molded of Santoprene 251-80.  Flammability classification 94V-0.
Chassis Dimensions     Part Dimensions
Maximum
Thickness
Mounting
Hole
Diameter
Part No. Description B Head
Diameter
C Overall
Height
A Head
Thickness
in.       mm. in.       mm. in.        mm. in.        mm. in.        mm.
.125        3,2 .875        22,2 3833 KOS-LT 1/2 1.281       32,5 .500       12,7 .359        9,1
.125        3,2 1.093      27,8 3835 KOS-LT 3/4 1.531       38,9 .546       13,9 .390        9,9
.125        3,2 1.375      34,9 3837 KOS-LT 1 1.796       45,6 .562       14,3 .421      10,7
Standard Color: Black

Heyco®Liquid Tight Knock-out Seals
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