Spring plunger
"Long-Lok" secured, bead and slot
Steel version : body in steel class 5.8 black oxide finish, ball in hardened steel, spring in spring steel class D. Long-Lok thread lock in nylon. Stainless steel version : body in stainless steel 1.4305, AISI 303, ball in hardened stainless steel 1.4034, spring in spring stainless steel 1.4310. L2 = 2 x thread pitch.