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Heyco Strain Reliefs Part Markings

Most Heyco strain reliefs are marked with their UL and CSA designation.  Below is a table showing all of the Heyco strain relief part numbers listed in the order of their corresponding UL/CSA designation.  Please note that these designations do not specify the color of the part.

Printable Summary
File # E15331
File # E103540
File # 8919
File # 81067
Marking Part Number Style / Cable Type
Black White
2L-1 1034 1035 Straight-Thru / Flat
2M-1 1060 1061 Straight-Thru / Round
2P-4 1017 1018 Straight-Thru / Flat
2P-5 1020 1021 Bell-Mouth / Flat
3A-4 1074 1075 Straight-Thru / Flat
3L-1 1094 1095 Straight-Thru / Flat
3P-4 1077 1078 Straight-Thru / Flat
3P-5 1080 1081 Bell-Mouth / Flat
3W-1 1104 1105 Straight-Thru / Flat
4A-6 1181 1182 Straight-Thru / Flat
4K-1 1114 1115 Straight-Thru / Flat
4K-4 1117 1118 Straight-Thru / Flat
4K-6 1190 1191 Straight-Thru / Flat
4L-1 1124 1125 Straight-Thru / Flat
4L-4 1127 1128 Straight-Thru / Flat
4N-4 1120 1121 Straight-Thru / Flat
4N-5 1108 1109 Bell-Mouth / Flat
4N-6 1187 1188 Straight-Thru / Flat
4N-7 1541 1542 Pigtail / Flat
4P-4 1130 1131 Straight-Thru / Flat
5K-4 1167 1168 Straight-Thru / Flat
5KN-4 1170 1171 Straight-Thru / Flat
5L-1 1154 1155 Straight-Thru / Round
5M-3 1140 1141 Straight-Thru / Round
5MN-3 1157 1158 Straight-Thru / Round
5N-4 1150 1151 Straight-Thru / Round
5N-5 1143 1144 Bell-Mouth / Round
5N-7 1590 1591 Pigtail / Round
5P3-4 1137 1138 Straight-Thru / Round
5P-4 1147 1148 Straight-Thru / Round
5P-7 1593 1594 Pigtail / Round
5S-1 1914 – Pigtail w/metal spring / Round
5W-1 1174 1175 Straight-Thru / Flat
6K-5 1229 1230 Bell-Mouth / Flat
6L-1 1214 1215 Straight-Thru / Round
6N2-4 1197 – Straight-Thru / Round
6N3-4 1200 1201 Straight-Thru / Round
6N3-5 1223 1224 Bell-Mouth / Round
6N3-7 1599 1600 Pigtail / Round
6N-4 1217 1218 Straight-Thru / Round
6N4-4 1160 1161 Straight-Thru / Flat
6N-7 1596 1597 Pigtail / Round
6P2-5 1232 1233 Bell-Mouth / Round
6P3-4 1207 1208 Straight-Thru / Round
6P3-5 1220 1221 Bell-Mouth / Round
6P3-7 1605 1606 Pigtail / Round
6P-4 1210 1211 Straight-Thru / Round
6P4-4 1163 1164 Straight-Thru / Flat
6P-5 1226 1227 Bell-Mouth / Round
6P-7 1602 1603 Pigtail / Round
6P10 CEE 3772 3773 CEE Series / Round
6P30 CEE 3776 3777 CEE Series / Round
6W-1 1184 1185 Straight-Thru / Round
7K-2 1240 1241 Straight-Thru / Round
7KR-2 1271 1272 Straight-Thru / Round
7L-2 1250 1251 Straight-Thru / Round
7N-2 1244 1245 Straight-Thru / Round
7P-2 1237 1238 Straight-Thru / Round
7P-7 1611 1612 Pigtail / Round
7W-2 1247 1248 Straight-Thru / Round
8L-1 1274 1275 Straight-Thru / Round
8N-2 1254 1255 Straight-Thru / Round
8P-2 1260 1261 Straight-Thru / Round
8R-2 1263 –  
8R-200 1266 1267 Lay-In
9P-2 1287 1288 Straight-Thru / Round
10-2 1320 1321 Right Angle / Round
11-2 1327 1328 Right Angle / Round
11K-2 1330 1331 Right Angle / Round
13-1 1354 1355 Right Angle / Flat
14-1 1364 1365 Right Angle / Flat
14A-1 1361 1362 Right Angle / Flat
15-1 1374 1375 Right Angle / Round
16-1 1384 1385 Right Angle / Flat
17-2 1397 1398 Right Angle / Round
20-1 1424 1425 Right Angle / Flat
20L-1 1434 1435 Right Angle / Flat
21-2 1440 1441 Right Angle / Flat
23-1 1454 1455 Right Angle / Flat
24-1 1464 1465 Right Angle / Flat
30-1 1484 1485 Straight-Thru / Flat
30-1A 1487 – Straight-Thru / Round
30-1B 1490 – Straight-Thru / Round
31-2 1497 1498 Straight-Thru / Flat or Round
33-1 1504 1505 Straight-Thru / Flat
34-2 1517 1518 Straight-Thru / Flat
300-1 1804 1805 Straight-Thru / Flat
302-1 1814 1815 Straight-Thru / Flat
– – – –
ISR 14-27 1854 1841 Inline Strain Relief / SPT-2
LSR1939-300 1843 1842 Multi-Lockit / Flat or Round
RDD 100 1874 1875 RDD Lockit™ / Flat
RDD 100-7 1771 1772 RDD Pigtail Lockit™ / Flat
RDD 100-90 1808 1809 RDD Right Angle Lockit™ / Flat
RDD 100A 1872 1873 RDD Lockit™ / Flat
RDD 100A-7 1769 1770 RDD Pigtail Lockit™ / Flat
RDD 100A-90 1806 1807 RDD Right Angle Lockit™ / Flat
RDD 101 1852 1853 RDD Lockit™ / Round
RDD 101-7 1773 1774 RDD Pigtail Lockit™ / Round
RDD 101-90 1818 1819 RDD Right Angle Lockit™ / Round
RDD 101-A 1870 1871 RDD Lockit™ / Round
RDD 101A-90 1816 1817 RDD Right Angle Lockit™ / Round
RDD 200 1878 1879 RDD Lockit™ / Flat
RDD 200-2 1876 1877 RDD Lockit™ / Flat
RDD 200-2-90 1812 1813 RDD Right Angle Lockit™ / Flat
RDD 200-90 1810 1811 RDD Right Angle Lockit™ / Flat
RDD 201 1857 1858 RDD Lockit™ / Round
RDD 201-2 1855 1856 RDD Lockit™ / Round
RDD 201-2-90 1822 1823 RDD Right Angle Lockit™ / Round
RDD 201-90 1820 1821 RDD Right Angle Lockit™ / Round
RDD 301 1861 1862 RDD Lockit™ / Round
RDD 301-2 1859 1860 RDD Lockit™ / Round
RDD 301-2-90 1826 1827 RDD Right Angle Lockit™ / Round
RDD 301-90 1824 1825 RDD Right Angle Lockit™ / Round
RDD 401 1865 1866 RDD Lockit™ / Round
RDD 501 1868 1869 RDD Lockit™ / Round
RDD 601 1802 1803 RDD Lockit™ / Round
RDD 6N-2 1800 1801 RDD Lockit™ / Round
RSR 875 1280 – Snap-In Ratcheting
ST-100L 1847 1846 Lockit™ / Flat
ST-100N 1829 1830 Lockit™ / Flat
ST-101A 1839 1840 Lockit™ / Round
ST-101N 1832 1833 Lockit™ / Round
ST-200N 1834 1835 Lockit™ / Flat
ST-201N 1836 1837 Lockit™ / Round
ST-301N 1848 1849 Lockit™ / Round
USR-40 1730 – USR Series / Round or Flat
USR-400 1724 – USR Series / Round or Flat
USR-401 1726 – USR Series / Flat
 
Description Part Number Style / Cable Type
MSR-1 7410 Metal Strain Relief / Round
MSR-1A 7411 Metal Strain Relief / Round
MSR-1B 7412 Metal Strain Relief / Round
MSR-2 7420 Metal Strain Relief / Round
MSR-2A 7419 Metal Strain Relief / Round
MSR-2S 7418 Metal Strain Relief / Round
MSR-2W 7414 Metal Strain Relief / Round
MSR-3 7430 Metal Strain Relief / Round

Note: Refer to the file numbers at right for current approval status.
Inclusion on this list does not indicate UL or CSA certification.