Answer
Jan 27, 2021 - 09:08 AM
PG 36 refers to the size and thread type of the locking nut. PG threads are a German thread type that have a smaller thread depth and larger flank angle than NPT or metric thread types. PG threads are straight, meaning they aren't tapered like NPT threads. 36 refers to the size. A PG 36 lock nut does not necessarily have a 36 mm diameter.
NPT thread types have 1/16 taper rate and is the most common thread type used in the US. They have a 60 degree flank angle. Metric threads are straight, not tapered, and have a 60 degree flank angle. Metric threads are labeled by their major thread diameter and pitch (Example: M32 x 1.5 refers to a 32 mm diameter and a 1.5 mm thread depth). PG threads have an 80 degree flank angle.
Sealcon PG 29 lock nuts have a major thread diameter of 37 mm and a minor thread diameter of 35.5 mm, which are linked below. However, the lock nut that would fit your connector would need to have the same thread type as well as the same size thread.
Sealcon PG 29 locking nuts
