snippet: Finish: Plain. For Screw Size: No. 8. Hardness: Rockwell B50. ID: 0.166". Length Tolerance: -0.005" to 0.005". OD: 5/16". Pack Quantity: 1. Shape: Round. Specifications Met: ASTM B211. System of Measurement: Inch. Tensile Strength: 45,000 psi. Type: Spacer