Hexagonal column plus K tooth, from the anti-loosening effect! Complete specifications, M3X0.5, M4X0.7, M5X0.8 other products, stainless steel and iron are produced, a variety of materials for you to choose! Welcome to order! Brand name specifications and models of stainless steel K cap M3X0.5 (5.5 * 3.2 * 7) Stainless steel K cap M5X0.8 (8 * 5 * 9.2) stainless steel cap 6 # -32 K (7.9 * 3.8 * 8.8) stainless steel K cap 10 # -24 (9.5 * 4.2 * 10.2) 1/4-20 stainless steel K cap (11 * 6 * 12.7) stainless steel K cap M4X0.7 (7 * 4 * 8) stainless steel K cap M8X1.25 13 * 8 * 14.6 stainless steel K cap 4 # -40 6.3 * 3.2 * 7 stainless steel K cap 10 # -32 9.5 * 4.2 * 10.2 stainless steel K cap M6X1.0 10 * 6 * 11 stainless steel K cap K cap 5/16-18-304 8 # -32 8.7 * 4.2 * 9.6