Lot 100 Stainless Steel Standoffs #4-40 x 3/16 Spacers Jackscrews Circuit Board New US Air Force Surplus, Jackscrews / Standoffs / Spacers. Excellent quality components from the USAF. Length of male thread portion.190". Material: Stainless Steel. Length of hex portion.187" (3/16"). byJuly 3, 2026