MS21209F4-20 self-locking thread insert for 1/4-28 thread, 0.250" diameter x 0.500" length. Structural size for high-load applications.MS21209F4-20 - Self-locking insert, 1/4-28 x 0.500"SKU: MS21209F4-20$1.00PriceThread Size1/4-28Length0.5MaterialStainless SteelFinishDyed RedDrill OptionN/AQuantity*Add to CartSpecificationsMS21209F4-20 NASM8846 AS5272Cross ReferencesMS21209F4-20Technical Details0.25 F4-20ApplicationsSelf Locking Screw Thread Inserts