Faithfull AGN8421 Grease Nipple Straight 1/4in UNF (5 Pack) The Faithfull Straight Grease Nipples are case hardened and zinc plated for corrosion resistance. They conform to DIN 71412 and are available in common threads. AGN8421 Specification: Thread: 1/4in UNF What is included: 1 x Faithfull AGN8421 Grease Nipple Straight 1/4in UNF (5 Pack)