Cable Accessories PVC Shrouds Cable Accessories Cable Gland Accessories Made from high grade PVC ensure higher IP rating and are denoted by gland reference number they are compatible with each gland size. Earth Tags Earth Tags Are available from 16mm to 75mm in Brass and Aluminum. Brass Earth Tags and Aluminium Earth tags ensure earth continuity between the electrical equipment and the gland. Lock Nuts Lock nuts are available in size from 16mm to 75mm in Brass and Galvanized Steel. We offer metric Lock Nuts and imperial Locknuts Brass Lock nuts Steel Lock Nuts Stainless Steel Lock nuts are available. Thread Comparison Chart Entry Thread Comparison Chart ISO NPT PG BSP ET 20s 1/2" 13.5 3/4" 3/4" 20 3/4" 16 3/4" 3/4" 25 1" 29 1 1/4" 1 1/4" 32 1 1/4" 29 1 1/4" 1 1/4" 40 1 1/2" 36 1 1/2" 1 1/2" 50 2" 42 2" 2" 63 2 1/2" 48 2 1/2" 2 1/2" 75 3" - 3" 3"