| THREAD SERIES DESIGNATOR | UNF | 
| NOMINAL THREAD DIAMETER | 0.312 INCHES | 
| THREAD QUANTITY PER INCH | 24 | 
| THREAD CLASS | 2A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.312 INCHES MAXIMUM | 
| FASTENER LENGTH | 1.780 INCHES MAXIMUM | 
| MATERIAL | STEEL CORROSION RESISTING OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | MS35308-368 MIL STD 1ST MATERIAL RESPONSE OR | 
|  | 304 MFR REF 2ND MATERIAL RESPONSE OR | 
|  | 316 MFR REF 3RD MATERIAL RESPONSE OVERALL | 
| SURFACE TREATMENT | PASSIVATE OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL | 
| COLOR | BLACK OVERALL | 
| HEAD STYLE | HEXAGON | 
| SHOULDER SHAPE | RIBBED ALL SHOULDERS | 
| SHOULDER WIDTH ACROSS FLATS | 0.271 INCHES MAXIMUM FIRST SHOULDER | 
|  | 0.375 INCHES MAXIMUM SECOND SHOULDER | 
| SHOULDER LENGTH | 1.298 INCHES MINIMUM AND | 
|  | 1.302 INCHES MAXIMUM SECOND SHOULDER | 
| SPECIAL FEATURES | BLACK OXIDE COAT IAW MIL-C-13294,CLASS 4 | 
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |