Manufacturer Part Number: Z9428|For Bolt Size|Outside Diameter|1.875inMaterial|Case-Hardened SteelMinimum Thickness|Maximum Thickness|Slot Width|Slot Depth|Finish|Black OxideMaterial Grade|12L14Hardness|Standards|Bolt Size (Inch)|Finish/Coating|Black OxideInside Diameter (Decimal Inch)|0.5313Inside Diameter (Inch)|17/32Military Specification|Does Not Meet Military SpecificationsOutside Diameter (Decimal Inch)|1.8750Outside Diameter (Inch)|1-7/8Thickness (Decimal Inch)|0.3750Thickness (Inch)|3/8UNSPSC Code|31161800