Plugs for sealing unused ports. With O-ring or copper washer as sealing element to DIN 908, alternatively with parallel or tapered thread to DIN 906. All versions made of brass MS 58, from BSP 1/8 inch to 2 inch.
Seal: The versions with O-ring and with copper washer comply with DIN 908 and seal via the sealing element on the collar; the threads are parallel. VSG and VSR comply with DIN 906 and are screwed in flush, VSG with parallel and VSR with tapered thread. A sealant is required for parallel threads without a sealing element — see group sealing tapes and thread sealants.