| FIRST END STYLE | SQUARE |
| FIRST STEP LENGTH | 1.180 INCHES MINIMUM AND 1.220 INCHES MAXIMUM |
| FIRST STEP DIAMETER | 0.372 INCHES MINIMUM AND 0.374 INCHES MAXIMUM |
| HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | BEVEL |
| HEIGHT | 0.250 INCHES MINIMUM AND 0.330 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 COMP 4140 FED SPEC 1ST MATERIAL RESPONSE OR AMS 6395 COMP 4140 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4140 OR STEEL OVERALL |
| SPECIAL FEATURES | 0.078 IN DIA HOLE LOCATED 0.110 IN. FROM HOLE CENTER TO SHANK END |
| PIN HEAD DIAMETER | 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM |
| SECOND STEP DIAMETER | 0.197 INCHES MINIMUM AND 0.203 INCHES MAXIMUM |
| SECOND STEP LENGTH | 0.199 INCHES MINIMUM AND 0.241 INCHES MAXIMUM |
| STYLE DESIGNATOR | SHOULDER |
| SURFACE FINISH | 125.0 MICROINCHES OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171 FINISH 5.3.1.2 OR 5.3.2.2 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| UNDER HEAD LENGTH | 1.419 INCHES MINIMUM AND 1.421 INCHES MAXIMUM |