The Female Half Coupler (SKU: HALFCPLR-F-GR-ASSY) is an injected molded product with a molded-in stainless steel nut to accept a 5/8 inch threaded bolt. The Female Half Coupler and the Male Half Coupler (SKU: HALFCPLR-GR-ASSY) are connectors for metal accessories (i.e. gangways, anchoring, & more)