The NAS6203-18 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. Undrilled shank, intended for use with self-locking nuts. Diameter: 3/16" Thread Pitch: 32 Thread Series: Fine Thread Length: Short Material: Alloy Steel Head: Hex Shank: Undrilled Grip Length: 1-1/8" Tensile Strength: 160 KSI Ftu Structural Function: Tension Fit Tolerance: Close-Tolerance