Knurled Head Spring-Loaded Plunger With Locking Function, 

also known as elastic cylindrical pin, is a headless hollow cylindrical body with axial slot and chamfered ends. 

It is used for positioning, connection and fixation between parts. It needs to have good elasticity and shear resistance. 

The outer diameter of this type of pin is slightly larger than the assembly hole diameter. 

Related categories: cylindrical pin, tapered pin, internal thread cylindrical pin, 

internal thread tapered pin, pin shaft, hole pin, groove pin, cotter pin.

Drawing:

PTL02-04-4

Standard universal model, for plate thickness 1.5mm (inclusive) and above, with self-locking function

PTL2-04-5 

Suitable for plate thickness above 1.8mm, no self-locking function, same size as PTL2-04-4, 

Only the tooth height is changed from 1.47 to 1.8 and the self-locking function is removed)