... plunger Zn(Rohs) Process:Machined and turned SGS audited More than 20 years experience in special fastener 1,Name:12L14 machining plunger ... ;12L14 plunger;Machining plunger2,For the similar plunger,what can we do ?(1), ... Ability for the material of this kind of plunger: Grade3.6,4.6,4.8,5.6,6 ... ,especially the cutting/turning parts. 12L14 machining plunger