Heyco® Liquid Tight Fittings Torque Chart
| Thread Size |
Fitting (Description) |
Heyco Part Numbers |
Sealing Nut Torque |
Locknut Torque |
| PG 7 |
RLTF 7 |
3444, 3445 |
25 in. lbs. |
35 in. lbs. |
| LTF 7 |
3207, 3208 |
| Flex RLTF 7 |
3464, 3465 |
| Flex LTF 7 |
3237, 3238 |
| PG 9 |
RLTF 9 |
3446, 3447 |
40 in. lbs. |
40 in. lbs. |
| LTF 9 |
3210, 3211 |
| Flex RLTF 9 |
3466, 3467 |
| Flex LTF 9 |
3240, 3241 |
| PG 11 |
RLTF 11 |
3448, 3449 |
65 in. lbs. |
45 in. lbs. |
| LTF 11 |
3213, 3214 |
| Flex RLTF 11 |
3468, 3469 |
| Flex LTF 11 |
3243, 3244 |
| PG 13.5* |
LTF 13.5 |
3216, 3217 |
80 in. lbs. |
80 in. lbs. |
| Flex LTF 13.5 |
3246, 3247 |
| PG 16 |
LTF 16 |
3219, 3220 |
120 in. lbs. |
124 in. lbs. |
| Flex LTF 16 |
3249, 3250 |
| PG 21 |
RLTF 21 |
3454, 3455 |
130 in. lbs. |
169 in. lbs. |
| LTF 21 |
3222, 3223 |
| Flex RLTF 21 |
3478, 3479 |
| Flex LTF 21 |
3245, 3248 |
| PG 29 |
LTF 29 |
3225, 3226 |
275 in. lbs. |
225 in. lbs. |
| 3/8 NPT |
RLTF 3/8 |
3458, 3459 |
40 in. lbs. |
40 in. lbs. |
| LTF 3/8 |
3228, 3229 |
| Flex RLTF 3/8 |
3474, 3475 |
| Flex LTF 3/8 |
3254, 3255 |
| 1/2 NPT |
LTF 1/2 |
3231, 3232 |
80 in. lbs. |
80 in. lbs. |
| Flex LTF 1/2 |
3251, 3252 |
| 1/2 NPT |
LLTF 1/2 |
3200, 3201 |
120 in. lbs. |
124 in. lbs. |
| Flex LLTF 1/2 |
3266, 3267 |
| 3/4 NPT |
RLTF 3/4 |
3460, 3461 |
130 in. lbs. |
169 in. lbs. |
| LTF 3/4 |
3234, 3235 |
| Flex RLTF 3/4 |
3462, 3463 |
| Flex LTF 3/4 |
3239, 3242 |
| 1 NPT |
RLTF 1 |
8439, 8440 |
225-250 in. lbs. |
200-225 in. lbs. |
| LTF 1 |
8437, 8438 |
* PG 13.5 is also known as PG 13
Note: The values shown are for reference only. The torque value for sealing nuts may vary depending upon the crush
resistance of the cable.
