“Stay Connected”
with
®
Strain Relief Bushings
Heyco Original Strain Relief Bushings
®
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 cables 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.
•
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.
WILL FIT THESE CABLES
UL Type
AWG/
Conductors
Approximate
Size
in.
16/2
18/3
SJ, SJT
& SJO
14/2
16/3
18/4
14/3
12/3
18/2
S, SO,
& ST
18/3
16/2
16/3
.325
.330
.350
.355
.360
.370
.425
.390
.405
.405
.430
.425-
.475
.530
.560
.600
mm.
8,3
8,4
8,9
9,0
9,1
See Schematic
9,4
10,8
9,9
10,3
10,3
10,9
.200 5,1
10,8-
12,1
13,5
14,2
15,3
.125 3,2
.187 4,8
15,2
16,1
16,3
17,5
1.093 27,7
1.093 27,7
1.093 27,7
1.187 30,2
1.000 25,4 .281 7,1
1287
SR 9P-2
1.000 25,4
2717
1260
1274
SR 8P-2
SR 8L-1
.812 20,6
.812 20,6
2509
consult Heyco
PANEL DIMENSIONS
A
B
Finished
Mounting To Prevent
Fit Panel
Hole Dia.
Rotation Thickness*
in. mm. in. mm. in. mm.
PART NO. DESCRIPTION PART DIM.
Mounting
Black
C
Hole Plug
BODY
LENGTH
in. mm. PART NO.
.875 22,2
.770 19,6 .125 3,2
1240
SR 7K-2
.750 19,1
2509
Same as SR 7K-2 above except
SJT
.125 3,2
1271
SR 7KR-2
.750 19,1
2509
.875 22,2
.770 19,6 .125 3,2
1247
SR 7W-2
.750 19,1
2509
Same as SR 7W-2 above except
SJT
12/3
14/2
S & ST
14/3
12/2
.875 22,2
1250
1497
SR 7L-2
SR 31-2
.750 19,1
.812 20,6
consult Heyco
.840 21,3 .125 3,2
2509
.875 22,2
.840 21,3 .062 1,6
1254
SR 8N-2
.828 21,0
2509
Same as SR 8N-2 above except
12/2
S
S, SO
& ST
SRDT
12/3
10/2
10/3
10/4
.600
.635
.640
.690
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.
B
B
B
A
.956
A
A
.255
FOR SR-7KR-2 ONLY
STANDARD MOUNTING HOLES
ELONGATED MOUNTING HOLE
C
Quick
Specs
4-21
Material
Certifications
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)
1-800-526-4182 • 732-286-1800 (NJ) • FAX: 732-244-8843 • www.heyco.com
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