PennEngineering® Thru-Hole Threaded Standoffs for Installation into Stainless Steel - Type SO4 - Metric SO4-M4-10

SO4™ standoffs are internally threaded fasteners designed for installation into stainless steel sheets as thin as 0.63mm, providing threaded separation for stacking or spacing applications. They are made from precipitation-hardened stainless steel for corrosion resistance comparable to 300 series stainless steel and require installation into sheets with hardness up to HRB 90 / HB 192. The M4 version accommodates a 4.22mm nominal hole size with a minimum sheet thickness of 0.77mm and a recommended hole center-to-edge distance of 6.9mm. All SO4 standoffs install permanently and maintain a flush, smooth surface on the reverse side of the sheet.