| FASTENER LENGTH | 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 1.190 INCHES MINIMUM AND 1.230 INCHES MAXIMUM |
| HEAD HEIGHT | 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM |
| HEAD STYLE | ROUND W/WRENCH FLATS |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8740 OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SHOULDER DIAMETER | 0.3090 INCHES MINIMUM AND 0.3110 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SPECIAL FEATURES | 2 HOLES 0.096 IN. MIN,0.100 IN. MAX DIA,0.760 IN. MIN,0.800 IN. MAX APART THRU TOP OF HEAD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| WIDTH BETWEEN FLATS | 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.318 INCHES MINIMUM AND 0.368 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 20 |