PennEngineering® Blind Threaded Standoffs for Installation into Stainless Steel - Type BSO4 - Metric BSO4-M3-18

BSO4™ blind threaded standoffs are self-clinching, internally threaded fasteners designed for installation into stainless steel sheets as thin as 0.64mm (0.025 inch), with the closed end flush on one surface. Made from precipitation-hardened stainless steel for corrosion resistance comparable to 300 series stainless, they accommodate sheets with hardness HRB 88 / HB 183 or less. The M3 size features a 4.22mm recommended hole size, 1.27mm nominal grip range, and a minimum distance of 6mm from the hole center to edge. Length of 18 (4.57mm) is indicated by the part code, and the F dimension minimum is 6.5mm.