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“Stay Connected” with Strain Relief Bushings ® Heyco Original Strain Relief Bushings ® Pigtail with Integral Nylon Spring, for Flat and Round Cables WILL FIT THESE CABLES UL Type AWG/ Conductors PANEL DIMENSIONS Approximate Size in. mm. PART DESC A B Finished NO. Mounting To Prevent Fit Panel Black Hole Dia. Rotation Thickness* in. mm. in. mm. in. mm. PART DIMENSIONS Mounting C D Hole Plug HEAD BODY LENGTH LENGTH in. mm. in. mm. PART NO. For Flat Cables SPT-1 18/3 .12x.30 3,0x7,6 SPT-2 & HPN 18/2 .15x.28 3,8x7,1 .500 12,7 .465 11,8 .062 1,6 1541 SR 4N-7 1.718 43,6 1.984 50,4 2491 .450 11,4 .062 1,6 1590 SR 5N-7 1.703 43,3 1.984 50,4 2491 .125 3,2 1593 SR 5P-7 1.703 43,3 1.984 50,4 2491 .550 14,0 .062 1,6 1596 SR 6N-7 1.718 43,6 2.109 53,6 2497 .125 3,2 1602 SR 6P-7 1.718 43,6 2.109 53,6 2497 .550 14,0 .062 1,6 1599 SR 6N3-7 1.718 43,6 2.109 53,6 2497 For Round Cables SV & SVT 18/2 .250 6,4 .500 12,7 18/3 .255 6,5 .500- 12,7.515 13,1 18/2 .270 6,9 .500 12,7 16/2 .290 7,4 .500- 12,7.515 13,1 HPD Same as SR 5N-7 above except SJ, SJO & SJT 18/2 .300 7,6 .625 15,9 Same as SR 6N-7 above except SJ, SJO & SJT 16/2 18/3 14/2 16/3 18/4 .315 .320 .350 .355 .360 8,0 8,1 8,9 9,0 9,1 .625 15,9 Same as SR 6N3-7 above except .125 3,2 1605 SR 6P3-7 1.718 43,6 2.109 53,6 2497 2.156 54,9 2.598 66,0 2503 1604 SR 6P3-7S** SJT 18/4 .360 9,1 SJT & SJTO 14/3 .370 9,4 S & ST 18/2 18/3 16/2 .390 .405 .405 9,9 10,3 10,3 16/3 .430 10,9 .750 19,0 .660 16,8 .125 3,2 1611 SR 7P-7 • Integral nylon spring eases the cable into a lazy bend; prevents sharp bending and assures longest cable and product life. • Adds reliability, longevity, and safety. Will pass CSA’s 50,000 cycle vacuum cleaner test (C22.2 No. 67). • Protects the lifeline of your electric/ electronic products by absorbing the forces of pull, push, twist, and flex. • Securely anchors, insulates, and protects cables at panel entry points. • Not recommended for applications where the power supply cord is subject to whipping or jump rope type motion. • See page 4-38 for corresponding Mounting Hole Plugs which can be used to fill blank/unused Mounting Holes and thus allow for a single panel design for multiple applications. • Consult Heyco for other wire types and sizes. • See pages 4-27 & 4-28 for SR assembly tools. • For Double D Mounting Hole Punches, see page 4-30. .750- 19,0.781 19,8 Standard color black. Consult Heyco for white and other colors. *Maximum Panel Thickness. Part has additional clearance. Consult Heyco for your Custom Finished Fit Panel Thickness. **For use in split housings only: Larger locking step on body and key, for additional pull out resistance. B A C MOUNTING HOLE D Material Certifications Flammability Rating Temperature Range Nylon 6/6 Recognized under the Component Program of Underwriters’ Laboratories File E15331 Certified by the Canadian Standards Association File 8919 94V-2 -.04°F (-18°C) to 221°F (105°C) 1-800-526-4182 • 732-286-1800 (NJ) • FAX: 732-244-8843 • www.heyco.com Quick Specs 4-24