snippet: Female Thread Length: 5/8". Finish: Plain. Hardness: Rockwell B70. Hex Size: 5/16". Length Tolerance: -0.005" to 0.005". Pack Quantity: 1. Shape: Hex. Specifications Met: ASTM A380. System of Measurement: Inch. Thread Size: 8-32. Threading: Fully Threaded. Type: Standoff