Type K - Steel, standard spring load
Type KS - Steel, high spring load
Type KN - Stainless Steel, standard spring load
Type KSN - Stainless Steel, high spring load
GN615.3 Spring Plunger, with Thread Locking
These spring plungers, GN615.3, in steel or stainless steel, have a thread locking system as follows:
The PFB patch is a jamming thread locking (Polyamide patch). The coating for type K or KN (standard spring load) is blue, and for type KS or KSN (high spring load) green. For this type of thread locking a relatively high torque is required. Therefore this version with internal hexagon is more preferable than the version with slot GN615.
MVK (Micro encapsulation) is a gluing thread locking (red).
Spring - Stainless steel AISI 631
Housing - Steel, blackened
Ball - Steel, hardened
Housing - stainless Steel AISI 303
Ball - Stainless steel AISI 420C, hardened
Marking of the type KS/KSN:
Housing with two longitudinal markings
Polyamide patch PFB
Type K/KS M3 - M16
Type K/KS M20, M24*
Type KN/KSN M3 - M16
Type KN/KSN M20, M24*
Micro encapsulation* MVK
* usually not availble from stock, requires a minimum order quantity
Also available without thread locking GN615.3.