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Heyco® Original Strain Relief Bushings

Internal Radii for Flat Cables

.500" (12,7 mm) Mounting Holes

  • Part Numbers and Specifications
  • Features
WILL FIT THESE CABLES PANEL DIMENSIONS PART NO. DESC. PART DIMENSIONS Mounting
Hole
Plug
CAD
UL
Type
AWG/
Conductors
Approximate
Size
A
Mounting
Hole Dia.
B
To Prevent
Rotation
Finished
Fit Panel
Thickness*
Black C
HEAD
LENGTH
D
BODY
LENGTH
in. mm. in. mm. in. mm. in. mm. in. mm. in. mm. PART NO.
SPT-1 18/3 .12 x .30 3,0 x 7,6 .500 12,7 .465 11,8 .040 1,0 1181 SR 4A-6 .270 6,9 .546 13,9 2491 CAD
SPT-2
& HPN
18/2 .15 x .28 3,8 x 7,1
SPT-1 18/3 .12 x .30 3,0 x 7,6 .500 12,7 .465 11,8 .062 1,6 1187 SR 4N-6 .270 6,9 .546 13,9 2491 CAD
SPT-2
& HPN
18/2 .15 x .28 3,8 x 7,1
16/2 .16 x .30 4,1 x 7,6 .515 13,1
Same as SR 4N-6 above except ––––––––––––––––––––––––––––>
.100 2,5 1190 SR 4K-6 .270 6,9 .546 13,9 2491 CAD

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.

  • Extra body length with flex-protecting internal radii.
  • Wider approved wire range than typical 4-series Strain Reliefs; SR 4A-6 features a 1,0 mm locking slot for Thin Panels.
  • Absorb forces of pull, push, and twist, to protect the electrical lifeline of your application.
  • For maximum flex protection, see Bell-Mouth and Pigtail Strain Reliefs.
  • Securely anchors, insulates and protects cables at panel entry points.
  • To assemble SR 4A-6 use Part No. 0021 R 291 Pliers, designed for .040" (1,0 mm) panel thickness, or semi-automated equipment.
  • To assemble SR 4N-6 and SR 4K-6, use Part No. 0022 R 29 Pliers, or semi-automated equipment.
  • Use Mounting Holes Plug Part No. 2491 to standardize panel design where the Strain Relief is not required.
  • 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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