THREAD SERIES DESIGNATOR | UNF |
NOMINAL THREAD DIAMETER | 0.250 INCHES |
THREAD QUANTITY PER INCH | 28 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.250 INCHES NOMINAL |
FASTENER LENGTH | 0.901 INCHES NOMINAL |
MATERIAL | STEEL CORROSION RESISTING SECONDARY WASHER |
| STEEL COMP 301 PRIMARY WASHER |
| STEEL COMP 302 SPRING |
| ALUMINUM ALLOY 6061 STAND-OFF |
| STEEL COMP 302 FASTENER |
MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE SPRING |
| QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| ASTM A493 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
SURFACE TREATMENT | PASSIVATE PRIMARY WASHER |
| PASSIVATE SPRING |
| ANODIZE STAND-OFF |
| PASSIVATE FASTENER |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
HEAD STYLE | HEXAGON |
HEAD HEIGHT | 0.306 INCHES NOMINAL |
WIDTH BETWEEN FLATS | 0.371 INCHES NOMINAL |
INTERNAL DRIVE STYLE | HEXAGON |
WIDTH ACROSS FLATS | 0.140 INCHES NOMINAL |
MATERIAL ACCOMMODATED THICKNESS | 0.188 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |