“Stay Connected”
with
®
Strain Relief Bushings
Heyco Original Strain Relief Bushings
®
Straight-Thru for Flat Cables
.375˝ (9,5 mm) to .500˝ (12,7 mm) Mounting Holes
•
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.
•
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.
B
WILL FIT THESE CABLES
UL Type
AWG/
Conductors
Approximate
Size
in.
300 OHM
SPT-1
20/2
22/2
18/2
18/3
18/2
18/3
16/2
16/3
CLOCK,
X & XT
SPT-1
mm.
PANEL DIMENSIONS
A
Mounting
Hole Dia.
in. mm.
9,5
9,5
9,9 .625- 15,9-
16,3
.100
2,5
B
Finished
To Prevent
Fit Panel
Rotation
Thickness*
in.
mm. in. mm.
PART NO. DESCRIPTION PART DIM.
Mounting
Black
C
Hole Plug
BODY
LENGTH
in. mm. PART NO.
.06 x .40 1,5 x 10,2 .375
.12 x .30 3,0 x 7,6
.15 x .40 3,8 x 10,2
.16 x .41 4,1 x 10,4
.375
.390
SPT-2
.415 10,5 .640
.422 10,7
.422 10,7
.437 11,1
1814
SR 302-1** .469 11,9
consult Heyco
Same as SR 302-1 above except
20/2
18/2
.09 x .18 2,3 x 4,6
.11 x .21 2,8 x 5,3
.375
9,5 .345
8,8
.156
.062
.125
9,9
4,0
1,6
3,2
1804
1017
1034
1074
1077
1104
1094
1130
SR 300-1
SR 2P-4
SR 2L-1
SR 3A-4
SR 3P-4
SR 3W-1
SR 3L-1
SR 4P-4
.469 11,9
.406 10,3
.406 10,3
.406 10,3
.406 10,3
.406 10,3
.440 11,2
consult Heyco
2617
2617
2488
2488
consult Heyco
Same as SR 2P-4 above except
SPT-1
18/2
.12 x .22 3,0 x 5,6 .437 11,1 .390
.040
1,0
***
.062
.100
.156
1,6
2,5
4,0
2,5
Same as SR 3A-4 above except
SPT-1,
SPT-2
& HPN
SPT-1
SPT-2
& HPN
18/2
18/3
18/2
.12 x .22 3,0 x 5,6 .500 12,7 .445
.12 x .30 3,0 x 7,6
.15 x .28 3,8 x 7,1
.500 12,7 .445
11,3
.100
2491
11,3
.062
.100
.156
1,6
2,5
4,0
1120
1117
1127
SR 4N-4
SR 4K-4
SR 4L-4
.406 10,3
.406 10,3
.406 10,3
2491
2491
consult Heyco
A
Same as SR 4N-4 above except
MOUNTING HOLE
C
SPT-1
SPT-2
& HPN
HPN
SPT-2
HPN
18/3
18/2
18/3
16/2
.12 x .30 3,0 x 7,6
.500 12,7
.15 x .28 3,8 x 7,1
.460
.15 x .34 3,8 x 8,6
.500- 12,7-
.16 x .30 4,1 x 7,6 .515 13,1
.187
4,7
1124
SR 4L-1
.500 12,7
consult Heyco
11,7
.095
2,4
1114
SR 4K-1
.500 12,7
2491
Same as SR 4K-1 above except
C
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.
Material
Certifications
*To install strain reliefs for .040˝ (1,0 mm)
maximum panel thickness, use
Part #0021
(No. R 291) Hand Pliers.
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)
4-17
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