| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | OXIDE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924,CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 35.00 ROCKWELL C MINIMUM AND |
| 43.0 ROCKWELL C MAXIMUM |
| STYLE DESIGNATOR | SPLIT HELICAL-RIGHT HAND |
| HOLE DIAMETER | 0.628 INCHES MINIMUM AND |
| 0.641 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.073 INCHES MAXIMUM |
| MATERIAL THICKNESS | 0.158 INCHES MINIMUM |
| SPECIAL FEATURES | SIZE 5/8 (0.625) NOMINAL |
| NONDEFINITIVE SPEC/STD DATA | C CLASS AND |
| 2 STYLE |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | WASHER,LOCK-SPRING,HELICAL,REGULAR(MEDIUM) SERIES |