| MATERIAL | STEEL COMP 8740 OR |
| STEEL COMP 4140 |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR |
| AMS 6324 ASSN STD 1ST MATERIAL RESPONSE OR |
| AMS 6382 ASSN STD 2ND MATERIAL RESPONSE |
| SURFACE TREATMENT | CADMIUM AND |
| DICHROMATE OVERALL |
| THREAD SERIES DESIGNATOR | UNS STUD THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| 0.312 INCHES STUD THREAD |
| THREAD CLASS | 3A NUT THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| 18 STUD THREAD |
| THREAD PITCH DIAMETERS | 0.2826 TO 0.2842 INCHES STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.641 INCHES MINIMUM NUT THREAD |
| 0.562 INCHES MINIMUM STUD THREAD |
| SPECIAL FEATURES | STUD END THREAD 0.004 IN. OVERSIZE |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND |
| 36.0 ROCKWELL C MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |