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Heyco® Original Strain Relief Bushings

Straight-Thru for Flat Cables

.375" (9,5 mm) to .500" (12,7 mm) Mounting Holes

  • Part Numbers and Specifications
  • Features
WILL FIT THESE CABLES PANEL DIMENSIONS PART NO. DESCRIPTION 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.
300 OHM† 20/2
22/2
.06 x .40 1,5 x 10,2 .375 9,5 .625 - .640 15,9 - 16,3 .100 2,5 1814 SR 302-1** .469 11,9 consult Heyco CAD
SPT-1 18/2
18/3
.12 x .30 3,0 x 7,6 .375 9,5
.390 9,9
SPT-2 18/2
18/3
.15 x .40 3,8 x 10,2 .415 10,5
.422 10,7
16/2
16/3
.16 x .41 4,1 x 10,4 .422 10,7
.437 11,1
Same as SR 302-1 above except ––––––––––––––––––––––––––––––––––––>
.156 4,0 1804 SR 300-1 .469 11,9 consult Heyco CAD
CLOCK
X & XT
20/2 .09 x .18 2,3 x 4,6 .375 9,5 .345 8,8 .062 1,6 1017 SR 2P-4 .406 10,3 2617 CAD
SPT-1 18/2 .11 x .21 2,8 x 5,3
Same as SR 2P-4 above except ––––––––––––––––––––––––––––––––––––> .125 3,2 1034 SR 2L-1 .406 10,3 2617 CAD
SPT-1 18/2 .12 x .22 3,0 x 5,6 .437 11,1 .390 9,9 .040*** 1,0 1074 SR 3A-4 .406 10,3 2488 CAD
Same as SR 3A-4 above except ––––––––––––––––––––––––––––––––––––> .062 1,6 1077 SR 3P-4 .406 10,3 2488 CAD
.100 2,5 1104 SR 3W-1 CAD
.156 4,0 1094 SR 3L-1 .406 10,3 consult Heyco  
SPT-1,
SPT-2,
& HPN
18/2 .12 x .22 3,0 x 5,6 .500 12,7 .445 11,3 .100 2,5 1130 SR 4P-4 .440 11,2 2491 CAD
SPT-1 18/3 .12 x .30 3,0 x 7,6 .500 12,7 .445 11,3 .062 1,6 1120 SR 4N-4 .406 10,3 2491 CAD
SPT-2
& HPN
18/2 .15 x .28 3,8 x 7,1
Same as SR 4N-4 above except ––––––––––––––––––––––––––––––––––––>
.100 2,5 1117 SR 4K-4 .406 10,3 2491 CAD
.156 4,0 1127 SR 4L-4 .406 10,3 consult Heyco CAD
SPT-1 18/3 .12 x .30 3,0 x 7,6 .500 12,7 .460 11,7 .095 2,4 1114 SR 4K-1 .500 12,7 2491 CAD
SPT-2
HPN
18/2 .15 x .28 3,8 x 7,1
HPN 18/3 .15 x .34 3,8 x 8,6 .500-.515 12,7-13,1
SPT-2
HPN
16/2 .16 x .30 4,1 x 7,6
Same as SR 4K-1 above except ––––––––––––––––––––––––––––––––––––>
.187 4,7 1124 SR 4L-1 .500 12,7 consult Heyco CAD

Standard color black. Consult Heyco for white and other colors.
† Wire is not UL/CSA approved.
*Maximum Panel Thickness. Part has additional clearance. Consult Heyco for your Custom Finished Fit Panel Thickness.
**Use Elongated Mounting Hole.
***To install Strain Reliefs for .040" (1,0 mm) Maximum Panel Thickness use Part No. 0021 (No. R 291) Hand Pliers.

*To install strain reliefs for .040" (1,0 mm) maximum panel thickness, use Part No. 0021 (No. R-291) Hand Pliers.

  • 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 for thin .040" (1,0 mm) panel available: SR 4A-6 & SR 3A-4. See charts 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.
  • 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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