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Heyco Strain Reliefs Straight Thru for Round Cable
Material: Nylon 6/6
Certifications:
File E15331
File 8919
Flammability Rating: 94V-2
Material Temperature Index: 125°C (257°F)–Max. temperature on part not to exceed 105°C (221°F)
- Protects the lifeline of your electric/electronic products by absorbing the forces of push, pull and twist that may be exerted on the flexible power cord.
- Securely anchors, insulates, and protects cable at panel entry points.
- Fill blank/unused mounting holes with Heyco Double D Plugs.
- See below for assembly tool and installation instructions.
- Heyco nylon strain reliefs are also available in Labkit #1. This handy compartmentalized box provides a working assortment for prototype use in design and engineering groups.
- Part markings
| Will Fit These Cables | Panel Dimensions | Part Number | UL/CSA Designation |
Part Dimensions | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UL Type Designation |
AWG/ Conductors |
Approximate Size | A Mounting Hole Diameter |
B To Prevent Rotation |
1 Finished Fit Panel Thickness |
Color | C Body Length |
|||||||
| in. | mm. | in. | mm. | in. | mm. | in. | mm. | Black | White | in. | mm. | |||
| AWM | 12/- | .125 - .187 | 3,2 - 4,8 | .375 | 9,5 | .330 | 8,4 | .062 | 1,6 | 1060 | 1061 | SR 2M-1 | .406 | 10,3 |
| SV & SVT | 18/2 | .220 - .245 | 5,6 - 6,2 | .500 | 12,7 | .450 | 11,4 | .062 | 1,6 | 1157 | 1158 | SR 5MN-3 | .438 | 11,1 |
Same as SR 5MN-3 above except  |
.100 | 2,5 | 1140 | 1141 | SR 5M-3 | .438 | 11,1 | |||||||
| For custom interlock cable, not UR |
.250 | 6,4 | .560 | 14,2 | .730 | 18,5 | .125 | 3,2 | 1487 | – | SR 30-1A * * | .672 | 17,1 | |
| .265 | 6,7 | 1490 | – | SR 30-1B * * | ||||||||||
| SV & SVT | 18/2 | .250 | 6,4 | .500 | 12,7 | .450 | 11,4 | .062 | 1,6 | 1150 | 1151 | SR 5N-4 | .438 | 11,1 |
| 18/3 | .255 | 6,5 | .500- .515 |
12,7- 13,1 |
||||||||||
| HPD | 18/2 | .270 | 6,9 | .500 | 12,7 | |||||||||
| 16/2 | .290 | 7,4 | .500- .515 |
12,7- 13,1 |
||||||||||
| SJT | 18/2 | .300 | 7,6 | .531 | 13,5 | |||||||||
| Same as SR 5N-4 above except |
.100 | 2,5 | 1147 | 1148 | SR 5P-4 | .438 | 11,1 | |||||||
| .156 | 4,0 | 1154 | 1155 | SR 5L-1 | .438 | 11,1 | ||||||||
| SV & SVT |
18/2 18/3 |
.255 .270 |
6,5 6,9 |
.500 | 12,7 | .450 | 11,4 | .100 | 2,5 | 1137 | 1138 | SR 5P3-4 | .438 | 11,1 |
| HPD | 18/2 | .290 | 7,4 | |||||||||||
| SJ, SJT & SJO | 18/2 | .300 | 7,6 | .500 | 12,7 | .465 | 11,8 | .090 | 2,3 | 1184 | 1185 | SR 6W-1 | .438 | 11,1 |
| SPT-3 | 16/2 | |||||||||||||
| SJ, SJT & SJO | 18/2 | .300 | 7,6 | .625 | 15,9 | .550 | 14,0 | .062 | 1,6 | 1217 | 1218 | SR 6N-4 | .578 | 14,7 |
| Same as SR 6N-4 above except |
.125 | 3,2 | 1210 | 1211 | SR 6P-4 | .578 | 14,7 | |||||||
| SJT | 18/3 | .300- .330 |
7,6 8,4 |
.625 | 15,9 | .550 | 14,0 | .062 | 1,6 | 1197 | – | SR 6N2-4 | .578 | 14,7 |
| SJ, SJT & SJO | 16/2 18/3 14/2 16/3 18/4 |
.325 .330 .350 .355 .360 |
8,3 8,4 8,9 9,0 9,1 |
.625 | 15,9 | .550 | 14,0 | .062 | 1,6 | 1200 | 1201 | SR 6N3-4 | .578 | 14,7 |
| Same as SR 6N3-4 above except |
.125 | 3,2 | 1207 | 1208 | SR 6P3-4 | .578 | 14,7 | |||||||
| S & ST | 18/2 | .390 | 9,9 | .625 | 15,9 | .550 | 14,0 | .062 | 1,6 | 1202 | 1203 | SR 6N5-4 | .578 | 14,7 |
| 18/3 16/2 |
.405 | 10,3 | ||||||||||||
| Same as SR 6N5-4 above except |
.125 | 3,2 | 1204 | 1205 | SR 6P5-4 | .578 | 14,7 | |||||||
| SJ, SJT & SJO | 18/2 16/2 18/3 16/3 |
.300 .325 .330 .355 |
7,6 8,3 8,4 9,0 |
.625 .656 .656 .687 |
15,9 16,7 16,7 17,4 |
.550 | 14,0 | .156 | 4,0 | 1214 | 1215 | SR 6L-1 | .678 | 17,2 |
| HPD | 16/3 | .355 | 9,0 | .687 | 17,4 | |||||||||
| SJT | 18/4 14/3 |
.360 .370 |
9,1 9,4 |
.750 | 19,1 | .660 | 16,8 | .062 | 1,6 | 1244 | 1245 | SR 7N-2 | .750 | 19,1 |
| S & ST | 18/2 18/3 16/2 |
.390 .405 .405 |
9,9 10,3 10,3 |
|||||||||||
| 16/3 | .430 | 10,9 | .750- .781 |
19,0- 19,8 |
||||||||||
| Same as SR 7N-2 above except |
.125 | 3,2 | 1237 | 1238 | SR 7P-2 | .750 | 19,1 | |||||||
| SJ, SJT & SJO | 16/2 18/3 14/2 16/3 18/4 |
.325 .330 .350 .355 .360 |
8,3 8,4 8,9 9,0 9,1 |
.875 | 22,2 | .770 | 19,6 | .125 | 3,2 | 1240 | 1241 | SR 7K-2 | .750 | 19,1 |
Same as SR 7K-2 above except  |
See Diagram | 1271 | 1272 | SR 7KR-2 | .750 | 19,1 | ||||||||
| SJT | 14/3 12/3 |
.370 .425 |
9,4 10,8 |
.875 | 22,2 | .770 | 19,6 | .125 | 3,2 | 1247 | 1248 | SR 7W-2 | .750 | 19,1 |
| S, SO & ST |
18/2 18/3 16/2 16/3 |
.390 .405 .405 .430 |
9,9 10,3 10,3 10,9 |
|||||||||||
| Same as SR 7W-2 above except |
.200 | 5,1 | 1250 | 1251 | SR 7L-2 | .750 | 19,1 | |||||||
| SJT | 12/3 | .425- .475 |
10,8- 12,1 |
.875 | 22,2 | .840 | 21,3 | .125 | 3,2 | 1497 | 1498 | SR 31-2 | .812 | 20,6 |
| S & ST | 14/2 14/3 12/2 |
.530 .560 .600 |
13,5 14,2 15,3 |
.875 | 22,2 | .840 | 21,3 | .062 | 1,6 | 1254 | 1255 | SR 8N-2 | .828 | 21,0 |
| Same as SR 8N-2 above except |
.125 | 3,2 | 1260 | 1261 | SR 8P-2 | .812 | 20,6 | |||||||
| .187 | 4,8 | 1274 | 1275 | SR 8L-1 | .812 | 20,6 | ||||||||
| S | 12/2 12/3 10/2 |
.600 .635 .640 |
15,2 16,1 16,3 |
1.093 1.125 1.093 |
27,7 28,6 27,7 |
1.000 | 25,4 | .281 | 7,1 | 1287 | 1288 | SR 9P-2 | 1.00 | 25,4 |
| S, SO & ST | 10/3 | .690 | 17,5 | 1.187 | 28,6 | |||||||||
| SRDT | ||||||||||||||
1 Maximum Panel Thickness–Part has additional clearance.
* * Use Elongated Mounting Hole.
* * Use Elongated Mounting Hole.
Labkit #1
An assortment of nylon strain reliefs may also be found in Heyco Labkit #1. Labkits contain an assortment of the most common sizes and are ideal for product design and engineering departments.
Heyco® Strain Reliefs
(Part #1999)
Position Heyco strain relief bushing on wire.
Squeeze pliers or activate 
Push Heyco strain relief into panel hole.