Heavy Duty Grease Gun Coupler. Each guaranteed to perform under pressure with repeated use Heat-treated, hardened spring steel jaws for extended service life ATD-5258 Heavy-Duty Grease Gun Coupler 1/8″ NPT(f) For use with all air operated high pressure grease pumps 7,500 max psi ATD-5259 Heavy-Duty Grease Gun Coupler Hardened coupler body withstands high pressure without deformation For use with hand lever grease guns 6,000 max psi
