| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | ALUMINUM ALLOY 6061 HEAD |
| STEEL COMP 302 SPRING |
| ALUMINUM ALLOY 6061 STAND-OFF |
| STEEL COMP 303 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE HEAD |
| 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 | ANODIZE HEAD |
| PASSIVATE SPRING |
| ANODIZE STAND-OFF |
| PASSIVATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE HEAD |
| 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 | KNURLED NO. 3 |
| HEAD DIAMETER | 0.531 INCHES NOMINAL |
| HEAD HEIGHT | 0.320 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 1.105 INCHES MINIMUM AND |
| 1.145 INCHES MAXIMUM |
| MATERIAL ACCOMMODATED THICKNESS | 0.172 INCHES MINIMUM AND |
| 0.234 INCHES MAXIMUM |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS |
| CRITICALITY CODE JUSTIFICATION | ZZZY |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 17446 |
| DESIGN CONTROL REFERENCE | F7500-12-D-5 |