McMaster 8478A79 Plate-Mount Retractable Spring Plunger, Twist-to-Lock,.39" Diameter Stainless Steel Nose, Stainless Steel Handle, 1.87" Long

Fasten these spring plungers to a flat surface when it's not possible to thread holes. The plate ensures a stable, even base so the spring plunger never shifts out of place. These spring plungers retract manually with a tug of the knob, so you can make controlled adjustments as needed for your job. They're often used for aligning sheet metal parts for cutting, stamping, and welding.

18-8 Stainless Steel Nose—The choice for wet and outdoor environments, 18-8 stainless steel resists rusting. It's strong enough for most jobs, but won't withstand stress and vibration as well as steel.

Twist-to-Lock—Free up both hands to adjust your workpiece or switch out parts without the plunger springing back and getting in the way. Pull back the handle and twist to lock the nose in its retracted position.