August 25, 2014
PEM® Type PTL2™ spring-loaded plunger assemblies from PennEngineering® serve as positioning pins to move racks, slides, access panels, and consoles to new positions without tools. A lockout feature in the standard product line keeps the fastener’s spring-loaded plunger fully retracted until the plunger pin drops into final position. A quarter-turn of the fastener activates the retracted locking and unlocking functions.
The assemblies install permanently in aluminum or steel sheets as thin as 0.060 in. with hardness of HRB 80 or less. Their engineering allows the reverse side of the sheet to remain flush when the plunger is retracted.
The fastener is placed into a recessed anvil, and the workpiece (punch side) is placed over the fastener’s shank. With punch and anvil surfaces parallel, squeezing force is applied until the shoulder of the fastener’s retainer comes into contact with the sheet material, which completes the installation process.