PennEngineering® Threaded Standoffs for Stainless Sheets as Thin as .025” TSO4-440-375

TSO4-440-375 is a self-clinching standoff for installation into ultra-thin stainless steel sheets as thin as 0.025 in (0.63 mm), featuring a #4-40 thread and length of 0.375 in. It has a minimum hole size of 0.213 in, minimum sheet thickness of 0.025 in, and requires a minimum distance of 0.27 in from the hole center to the edge. The standoff is made of heat-treated 400 series stainless steel with a passivated finish per ASTM A380 and is rated for use in materials with hardness of HRB 88 or HB 183 or less. Installation requires a punch and anvil setup with anvil bore dimension B between 0.187 in and 0.194 in. Style #2 threading allows screw passage through the unthreaded end, with incomplete threads permitting full screw travel. Pullout resistance averages 6800 lbs (30.3 kN), and torque-out resistance averages 22 in-lbs (2.5 N·m).