| MATERIAL | COPPER ALLOY 172 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM B194,1/4 H ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND |
| 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM |
| STYLE DESIGNATOR | SPRING TENSION |
| HOLE DIAMETER | 0.266 INCHES MINIMUM AND |
| 0.271 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 0.500 INCHES MINIMUM AND |
| 0.505 INCHES MAXIMUM |
| OVERALL HEIGHT | 0.039 INCHES MINIMUM AND |
| 0.045 INCHES MAXIMUM |
| MATERIAL THICKNESS | 0.0137 INCHES MINIMUM AND |
| 0.0163 INCHES MAXIMUM |
| SPEC/STD CONTROLLING DATA | |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-W-12133/3 |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M12133/3-266 |