Heavy Nut           : A194 Gr.2H / Gr.2HM / Gr.4L / Gr.7L / Gr.8 / Gr.8M – A182 F51 / F53 / F55, etc

Size   : 1/2″ – 3”

HITAM . A193 Gr. B 7 NUT 2H.

Coating :   Xylan 1424 (Fluorocarbon), HDG A153