Stay Connected with Bushings, Grommets, HEYcaps & Plugs Consult Heyco Heyco Nylon Knock Out Seals for our Complete Line of Dome Plugs and Thick Panel Knock Out Seals Mounting Hole Diameter Range: 1/2 to 2 Electrical Knock-outs (.875 to 2.500 nominal) Plug electrical knock-outs. MOUNTING TRADE SIZE PART NO. DESCRIPTION PART DIMENSIONS HOLE Silver AB Molded in silver gray color to DIAMETER Gray Head Diameter Overall Height resemble galvanized steel. in. mm. in. mm. in. mm. Install quickly with fingertip Multiple Locking Steps for Panel Thickness up to .125 (3,2 mm) pressure (no tool required)875 22,2 1/2 3997 KOS 1/2 1.02 25,8 Economical. 1.093 27,8 3/4 3998 KOS 3/4 1.22 31,0 .45 11,5 Multiple trade sizes fit 1/2 to 2 1.375 34,9 1 3999 KOS 1 1.50 38,1 knock-out holes. 1.750 44,5 1-1/4 4000 KOS 1-1/4 1.91 48,4 .47 12,0 Lock firmly in boxes up to 1/8 2.000 50,8 1-1/2 4001 KOS 1-1/2 2.16 54,9 .45 11,5 thick, except for Part Number 4002 Multiple Locking Steps for Panel Thickness up to .250 (6,4 mm) (KOS 2) and Thick Panel Knock-Out .875 22,2 1/2 3991 KOST 1/2 1.02 25,8 Seals (KOSTs) which lock firmly in boxes up to 1/4 thick. 1.093 27,8 3/4 3992 KOST 3/4 1.22 31,0 .56 14,3 1.375 34,9 1 3993 KOST 1 1.50 38,1 Locking fingers in fractional increments up to the maximum 1.750 44,5 1-1/4 3994 KOST 1-1/4 1.91 48,4 panel thickness. 2.000 50,8 1-1/2 3995 KOST 1-1/2 2.16 54,9 .58 14,7 Approximate Head Thickness: 2.500 63,5 2 4002 KOS 2 2.73 69,3 .75 19,1 .06 (1,6 mm). Thickness may vary. Standard color silver gray. To adapt a Knock-Out to accept a A B Heyco Strain Relief, see page 4-37 for Knock-Out Adapters in the Heyco Catalog . Heyco Nylon V-0 Knock Out Seals Multiple Locking Steps for Panel Thickness up to .13 (3,2 mm) Mounting Hole Diameter Range: 1/2 to 1-1/2 Electrical Knock-outs (.875 to 2.000 nominal) MOUNTING TRADE SIZE PART NO. DESCRIPTION PART DIMENSIONS Molded from a nylon material which, HOLE AB in the event of a fire, will not burn DIAMETER Black Head Diameter Overall Height and will not produce toxic gases. in. mm. in. mm. in. mm. Also formulated for sunlight resistance875 22,2 1/2 2706 HFP 875 1.02 25,8 1.093 27,8 3/4 2729 HFP 1093 1.22 31,0 1.375 34,9 1 2759 HFP 1375 1.50 38,1 .45 11,5 1.750 44,5 1-1/4 2779 HFP 1750 1.91 48,4 2.000 50,8 1-1/2 2789 HFP 2000 2.16 54,9 Standard color black. Material Nylon 6/6 Certifications Recognized under the Component Program of Underwriters Laboratories, Quick File E51579 Certified by Canadian Standards Association, File 8919 Flammability Rating KOS: 94V-2, HFP 94V-0 Specs Temperature Range -40F (-40C) to 221F (105C) 6-37 1-800-526-4182 732-286-1800 (NJ) FAX: 732-244-8843 www.heyco.comX-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for Cable Mounting & Accessories category: Click to view products by Heyco manufacturer: Other Similar products are found below : HP-4N 582603-1 009333-000 727844N003 809090N001 8109 843188-000 843459N001 843460N003 8666 967279N002 GPQC1/0 DB- 11 1300830208 1300840039 1300900026 1300990052 1301740005 1301800121 1301800416 1300830184 1300990149 1301580036 1301720103 1301720135 1301720152 1301720157 1301740009 1301770011 1301850553 1301860939 1302000074 1302264431 1337706-2 APA18-AK MTX6UTPSRC-C 1-787307-1 185491N001 HP-6N C-202-C 202C221-13-0 OMTM-S10-C0 205339-4 CA7308- 000 8S23-75FR-CS8184 2684 9648 3089 988382-000 A0270164