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Heyco® Original Strain Relief Bushings

  • Features
  • Part Numbers and Specifications

Straight-thru for Round Cables

.875" (22,2 mm) to 1.187" (30,1 mm) Mounting Holes
Fit 1/2˝ or 3/4˝ Electrical Knock-out Hole Sizes

  • Protects the lifeline of your electric/electronic products by absorbing the forces of pull, push, and twist that may be exerted on the flexible power cord.
  • Securely anchors, insulates, and protects cable at panel entry points.
  • Sizes SR 7-Series to SR 9-Series for mounting hole diameters from .875" (22,2 mm) to 1.187" (28,6 mm).
  • Sizes for thin .062" (1,6 mm) panel available: SR 8N-2. See chart for details.
  • Corresponding Mounting Hole Plugs 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.
  • For SR assembly tools, click here.

QuickSpecs

Material   Nylon 6/6
Certifications ru Recognized under the Component Program of Underwriters' Laboratories File E15331
csa Certified by the Canadian Standards Association File 8919
Flammability Rating   94V-2
Material Temperature Index   257°F (125°C)-maximum temperature on part not to exceed 221°F (105°C)
WILL FIT THESE CABLES PANEL DIMENSIONS PART NO. DESC. PART DIM. Mounting
Hole
Plug
CAD
UL
Type
AWG/
Conductors
Approximate
Size
A
Mounting
Hole Dia.
B
To Prevent
Rotation
Finished
Fit Panel
Thickness*
Black C
BODY
LENGTH
in. mm. in. mm. in. mm. in. mm. in. mm. PART NO.
SJ, SJT
& SJO
16/2 .325 8,3 .875 22,2 .770 19,6 .125 3,2 1240 SR 7K-2 .750 19,1 2509 CAD
18/3 .330 8,4
14/2 .350 8,9
16/3 .355 9,0
18/4 .360 9,1
Same as SR 7K-2 above except –––––––––––––––––––––––––––––––––––––––––––>
See Schematic 1271 SR 7KR-2 .750 19,1 2509 CAD
SJT 14/3 .370 9,4 .875 22,2 .770 19,6 .125 3,2 1247 SR 7W-2 .750 19,1 2509 CAD
12/3 .425 10,8
S, SO,
& ST
18/2 .390 9,9
18/3 .405 10,3
16/2 .405 10,3
16/3 .430 10,9
Same as SR 7W-2 above except –––––––––––––––––––––––––––––––––––––––––––>
.200 5,1 1250 SR 7L-2 .750 19,1 consult Heyco CAD
SJT 12/3 .425 - .475 10,8-12,1 .875 22,2 .840 21,3 .125 3,2 1497 SR 31-2 .812 20,6 2509 CAD
S & ST 14/2 .530 13,5 .875 22,2 .840 21,3 .062 1,6 1254 SR 8N-2 .828 21,0 2509 CAD
14/3 .560 14,2
12/2 .600 15,3
Same as SR 8N-2 above except –––––––––––––––––––––––––––––––––––––––––––>
.125 3,2 1260 SR 8P-2 .812 20,6 2509 CAD
.187 4,8 1274 SR 8L-1 consult Heyco CAD
S 12/2 .600 15,2 1.093 27,7 1.000 25,4 .281 7,1 1287 SR 9P-2 1.00 25,4 2717 CAD
12/3 .635 16,1 1.125 28,6
10/2 .640 16,3 1.093 27,7
S, SO
& ST
10/3 .690 17,5 1.187 28,6
SRDT 12/4

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.

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