The NAS6205-48D is a tension bolt (bolt, tension, hex head, close tolerance, alloy steel, short thread, reduced major diameter, self-locking and nonlocking, 160 KSI Ftu), manufactured to aerospace standards for aircraft applications. Alloy steel. Drilled shank for use with a castle nut and cotter pin. Diameter: 5/16" Thread Pitch: 24 Thread Series: Fine Thread Length: Short Material: Alloy Steel Head: Hex Shank: Drilled Grip Length: 3" Tensile Strength: 160 KSI Ftu Structural Function: Tension Fit Tolerance: Close-Tolerance