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Heyco® Original Strain Relief Bushings

Straight-Thru for Flat Cables

.560" (14,2 mm) to .875" (22,2 mm) Mounting Holes

  • Part Numbers and Specifications
  • Features
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.
SPT-2 18/3 .15 x .40 3,8 x 10,2 .562 14,3 .530 13,5 .125 3,2 1174 SR 5W-1 .609 15,5 2494 CAD
16/3 .16 x .41 4,1 x 10,4
HPN 16/2 .16 x .37 4,1 x 9,4
16/3 .16 x .42 4,1 x 10,5
SPT-3 18/2 .19 x .35 4,8 x 8,9 .562 14,3 .530 13,5 .062 1,6 1170 SR 5KN-4 .609 15,5 2494 CAD
16/2 .20 x .37 5,1 x 9,4
SPT-2 18/3 .15 x .40 3,8 x 10,2
SPT-2
& HPN
16/3 .16 x .41 4,1 x 10,4
Same as SR 5KN-4 above except ––––––––––––––––––––––––––––>
.125 3,2 1167 SR 5K-4 .609 15,5 2494 CAD
SPT-2 18/3 .15 x .40 3,8 x 10,2 .560 14,2 .730 18,5 .125 3,2 1484 SR 30-1** .672 17,1 consult Heyco CAD
16/3 .16 x .41 4,1 x 10,4
SPT-3 18/2 .19 x .35 4,8 x 8,9
18/3 .19 x .39 4,8 x 9,9
16/2 .20 x .37 5,1 x 9,4
16/3 .20 x .43 5,1 x 10,9
SPT-2 18/3 .15 x .40 3,0 x 7,6 .625 15,9 .550 14,0 .062 1,6 1160 SR 6N4-4 .578 14,7 2497 CAD
16/3 .16 x .41 4,1 x 10,4
Same as SR 6N4-4 above except ––––––––––––––––––––––––––––>
.125 2,5 1163 SR 6P4-4 .578 14,7 2497 CAD
SPT-3 16/2 .20 x .37 5,1 x 9,4 .750 19,0 .875 22,2 .125 3,2 1504 SR 33-1** .781 19,8 consult Heyco CAD
16/3 .20 x .43 5,1 x 10,9
14/2 .24 x .42 6,1 x 10,7
14/3 .24 x .51 6,1 x 12,9
Fit 1/2" Electrical Knock-out Hole
SPT-3 14/2 .24 x .42 6,1 x 10,7 .875 22,2 .840 21,3 .125 3,2 1517 SR 34-2 .813 20,7 2509 CAD
14/3 .24 x .51 6,1 x 12,9
12/2 .29 x .51 7,4 x 12,9
12/3 .29 x .65 7,4 x 16,5
SPT-3 12/3 .32 x .65 8,1 x 16,5 .875 22,2 .835 21,2 .125 3,2 1497 SR 31-2 .812 20,6 2509 CAD
10/3

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.
**Use Elongated Mounting Hole.

  • 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.
  • Consult Heyco for other wire types and sizes.
  • Corresponding Mounting Hole Plugs can be used to fill blank/unused Mounting Holes and thus allow for a single panel design for multiple applications.
  • For SR assembly tools, click here.
  • For Double D Mounting Hole Punches, 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
Temperature Range   -.04°F (-18°C) to 221°F (105°C)
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