| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A510; CARBON STEEL 1060 THRU 1080 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633, TYPE II, CLASS FE/ZN 13 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND |
| 53.0 ROCKWELL C MAXIMUM |
| STYLE DESIGNATOR | SPLIT HELICAL-RIGHT HAND |
| HOLE DIAMETER | 1.254 INCHES MINIMUM AND |
| 1.280 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 2.036 INCHES MAXIMUM |
| MATERIAL THICKNESS | 0.332 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 96906-MS51415 GOVERNMENT STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | WASHER,LOCK-HELICAL SPRING,REGULAR (MEDIUM) SERIES |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS51415-15 |