McMaster 93275A052 Black Oxide Steel Threaded on Both Ends Setup Stud, M12 x 1.75 mm Thread, 31 mm Thread Lengths, 95 mm Long LSR0601T 0254 VS NNN NNN N Viton fluoroelastomer seals for chemical Viton fluoroelastomer seals for chemical compatibility custom machined tip prevents stripping and reduces wobble SHOCK ZONESTM are optimized in both length and width across all tip types for best performance across tip types Laser hardening at the tip creates an outer protective shield for improved wear resistance Customized geometry and heat treatment per tip type for best performance across tip types Up to 50X Life vs other impact bits Laser etched size for easy identification Includes SHOCKWAVE Impact DutyTM nut drivers with the most durable magnet for longer life in tough applications Known as setup studs DIN 939—Studs that meet DIN standards meet dimensional and material requirements