we develop and manufacture wide range of Brass Lock Nuts, Metric Lock Nuts, NPT Lock Nutsmainly used to secure a cable gland, reducer, and adaptor in position at the equipment and electrical installation due to low corrosion effect. Brass Metric Lock Nut : Thread Dia. A/F A/C Thickness M16 19.00 22.00 3.00 M20 24.00 26.95 3.25 M25 30.00 34.00 3.25 M32 37.00 39.00 3.75 M40 47.00 53.00 4.50 M50 56.00 62.00 4.75 M63 72.00 77.00 6.50 M75 85.00 91.00 6.50 M90 106.00 112.00 10.00 Brass NPT Lock Nut : Thread Dia. A/F A/C Thickness 1/2" 30.00 34.00 3.00 3/4" 30.00 34.00 3.25 1" 37.00 39.00 3.25 1 1/4" 47.00 53.00 3.75 1 1/2" 56.00 62.00 4.50 2" 72.00 77.00 4.75 2 1/2" 85.00 91.00 6.50 3" 106.00 112.00 6.50 3 1/2" 127.00 142.00 10.00 Material : High Grade Free Cutting Brass. CZ 115 c377, c380, cz122, en 12165 – cw617n, EN 12164 BS 2874 - CZ 114 BS 2874, cw612n, cuzn40pb2 & cuzn39pb2, BS 2874 - CZ 121 Pb3 CZ 122 UNS C36000 CDA 360 DZR CZ 131 CW 614 N. Finish and Coating : Natural, Nickle Plated, Silver Plated, Tin Plated .