PennEngineering® Threaded Standoffs for Stainless Sheets as Thin as .025” TSO4-440-250

TSO4-440-250 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 a length of 0.250 in. It has a body diameter of 0.187 in., a minimum hole size of 0.165 in., and a minimum distance to edge of 0.230 in. Made of heat-treated 400 series stainless steel and passivated per ASTM A380, it is rated for use in materials with hardness of HRB 88 or HB 183 or less. The design supports thru-threading and meets ASME B1.1, 2B thread standards. Installation requires a dedicated anvil and punch tooling, with recommended anvil part number 8003291 for sheets under 0.032 in. thick. Average pull-out force is 5700 lbs (25.4 kN) and torque-out resistance is 13 in.-lb (1.5 N·m) when installed in 0.025 in. 300 series stainless steel sheet.