- Inch
 - 5/16-18 UNC Thread Size & Type
 - Plug Chamfer Type
 - HSS Material
 - TiN Coating
 
| Overall Length | 2.7188 in | 
| Threads per Inch | 18 | 
| Operation Type | Thru-Hole | 
| Material | HSS | 
| Thread Size - Decimal | 0.3125 in | 
| Thread Per Inch | 18 | 
| Thread Length - Metric | 17.46 mm | 
| Tap Type | Machine | 
| Direction of Cut | Right Hand | 
| Blank Construction | USCTI Table 302A | 
| Thread Limit | H3 | 
| Thread Length | 0.6875 in | 
| Thread Size | 5/16 in | 
| Thread Size & Type | 5/16-18 UNC | 
| Diameter - Decimal | 0.3125 in | 
| Thread Type | UNC | 
| Thread Size - Metric | 7.94 mm | 
| Ground Threads | Yes | 
| Spiral Point | Yes | 
| Truncated Threads | No | 
| Shank End Feature | Square | 
| Chamfer Type | Plug | 
| Thread Creation | Thread Cutting | 
| Tap Size | 5/16 in | 
| Shank Square Width - Metric | 6.05 mm | 
| Pitch Dia. | H3 | 
| Shank Square Length - Metric | 9.52 mm | 
| Shank Size - Metric | 8.08 mm | 
| Thread Tolerance | 2B | 
| Diameter - Fraction | 5/16 in | 
| No. of Flutes | 3 | 
| Interrupted Thread | No | 
| Shank Square Width | 0.238 in | 
| Shank Square Length | 0.375 in | 
| Thread Pitch | N/A | 
| Finish | Vertanium™ Coated | 
| Weight | 0.051 LB | 
        
