RH, RHZ and RHM Nuts:
The self-locating feature on this nut facilitates positive positioning for welding. 

SF Nut:
Used when a heavier weld is required. With its ring projection, it can be easily adapted to welding on wire.

WF, WFZ and WFM Nuts:
Used where a blind application is required rather than a through the hole application.

WT and WTZ Nuts:
Ideal for use where narrow channels, and confined areas require a strong weld and long thread engagement.

WW, WWZ and WWM Nuts:
Used where a closed end and hermetic seal is required to prevent leakage of air, gas or water.

RB Weld Boss Fastener:
The RB boss can be used as a bushing, guide or a bearing. It has no threads and three projections on the underside of the head.