Attributes . Machined components are manufactured using solid steel bar stock. Stainless steel retaining rings and springs maximize corrosion resistance and extend service life. Steel componentry is plated using ROHS Compliant Zinc Nickel; Rugged high-strength steel wing nut for threaded connect and disconnect operation. Red powder coated coupler wing-nut and external nipple O-ring for easy BOP service identification. Blow-out Prevention (BOP) couplings contain severe service FKM seals; PTFE anti-extrusion ring protects main coupling O-Ring from dynamic impulse pressure damage. Main valve seal is 'housed' to improve seal integrity during pressurized connection/disconnection. . Names