Manufacturer Part Number: 20021|Slot Width|Type|T-Slot BoltSlot Width (Inch)|1/2Slot Width (Decimal Inch)|Head Height (Inch)|9/32Head Height (mm)|Head Width (Inch)|7/8Head Width|Length Under Head (mm)|Length Under Head (Inch)|4-1/2Material|SteelMaterial Grade|5; C1045Thread Fit Class|Class 3Finish|UncoatedThread Size (Inch)|1/2-13Thread Size (mm)|Thread Standard|UNCThread Length (Inch)|2Thread Length (mm)|Thread Length (Decimal Inch)|2in; 2.0inFastener Standard|System Of Measurement|InchProduct Service Code|UNSPSC Code|31161600