| MATERIAL | STEEL COMP 4130 |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A304 ASSN STD SINGLE MATERIAL RESPONSE |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DOD-P-16232 TY M CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| STYLE DESIGNATOR | SHOULDERED |
| SHOULDER LENGTH | 3.370 INCHES MINIMUM AND |
| 3.380 INCHES MAXIMUM |
| NUT END SHANK LENGTH | 0.805 INCHES MINIMUM AND |
| 0.885 INCHES MAXIMUM |
| DISTANCE ACROSS FLATS | 0.750 INCHES NOMINAL |
| STUD END SHANK LENGTH | 0.865 INCHES MINIMUM AND |
| 0.885 INCHES MAXIMUM |
| STUD END SHANK DIAMETER | 0.498 INCHES MINIMUM AND |
| 0.499 INCHES MAXIMUM |
| NUT END SHANK DIAMETER | 0.498 INCHES MINIMUM AND |
| 0.499 INCHES MAXIMUM |
| OVERALL LENGTH | 6.250 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNC NUT THREAD |
| UNC STUD THREAD |
| NOMINAL THREAD SIZE | 0.312 INCHES NUT THREAD |
| 0.312 INCHES STUD THREAD |
| THREAD CLASS | 3A NUT THREAD |
| 3A STUD THREAD |
| THREAD QUANTITY PER INCH | 18 NUT THREAD |
| 18 STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.468 INCHES MINIMUM NUT THREAD |
| 0.468 INCHES MINIMUM STUD THREAD |
| HARDNESS RATING | 270.0 BRINELL STANDARD MINIMUM AND |
| 295.0 BRINELL STANDARD MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |