Heyco® Straight-Thru Strain Relief Bushings
Recognized under the Component Program of Underwriters' Laboratories File #E-15331
Certified by Canadian Standards Association File #LR-8919
For round cables
UL TYPE Designation
AWG Conductors
Approx Cable Diameter
A Mounting Hole
B To Prevent Rotation
Maximum Thickness
PART NO.
UL/CSA Desc
D Part Length
in. mm.
in. mm.
in. mm.
in. mm.
Black
White
in. mm.
SJ, SJT &SJO
16/2
.325 8,3
.875 22,2
.770 19,6
.125 3,2
1240
1241
SR 7K-2
3/4 19,0
18/3
.330 6,4
14/2
.350 8,9
16/3
.355 9,0
18/4
.360 9,1
SAME AS SR 7K-2 ABOVE EXCEPT ----->
SEE SCHEMATIC
1271
1272
SR 7KR-2
SJT
18/4
.360 9,1
.750 19,0
.660 16,8
.062 1,6
1244
1245
SR 7N-2
14/3
.370 9,4
S & ST
18/2
.390 9,9
18/3
.405 10,3
16/2
.405 10,3
16/3
.430 10,9
.750 19,0
.781 19,8
SAME AS SR 7N-2 ABOVE EXCEPT ----->
.125 3,2
1237
1238
SR 7P-2
SJT
14/3
370 9,4
.875 22,2
.770 19.6
.125 3,2
1247
1248
SR7W-2
12/3
.425 10,8
S & ST
18/2
.390 9,9
18/3
.405 10,3
16/2
SAME AS SR 7W-2 ABOVE EXCEPT ----->
200 5,1
1250
1251
SR 7L-2
SJT
12/3
.425 10,8 .475 12,1
.875 22,2
.840 21,3
.125 3,2
1497
1498
SR 31-2
13/16 20,6
S & ST
14/2
.530 13,5
.875 22,2
.840 21,3
.062 1,6
1254
1255
SR 8N-1
53/64 20,8
14/3
.560 14,2
12/2
.600 15,3
SAME AS SR 8N-1 ABOVE EXCEPT ----->
.125 3,2
1260
1261
SR 6P-2
.187 4,8
1274
1275
SR 8L-1
13/16 20,6
S
12/2
.600 15,2
1.093 27,7
1.000 25,41.093 27,7
.281 7.1
1287
1288
SR 9P-2
1 25,4
12/3
.635 16.1
1.125 28,6
10/2
.640
16,3
S, ST & SO
10/3
.690 17,5
1.187 28,6
Standard Strain Relief Color: Black. White and other strain relief colors are available at extra charge (only in large quantities). New Sizes for narrow nylon fastener of the size .062"(1,6mm) chassis available: SR 7N-2 SR 8N-1 See chart forstrain relief details. (Click here to see our guide on choosing the best strain relief for your application.) Labkit No. 1 ( Part #1999) Provides a working assortment for prototype strain relief and labatory use. 180 assorted Heyco Strain Relief fasteners are identified in a handy compartmentalized plastic box. Ideal nylon fastener strain reliever parts for design engineering groups.