| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 1.055 INCHES MINIMUM AND |
| 1.135 INCHES MAXIMUM |
| MATERIAL | ALUMINUM ALLOY 6061 HEAD |
| STEEL COMP 301 OR |
| STEEL COMP 304 OR |
| STEEL COMP 305 OR |
| STEEL COMP 316 SECONDARY WASHER |
| STEEL COMP 631 PRIMARY WASHER |
| STEEL COMP 305 SPRING |
| STEEL COMP 304 STAND-OFF |
| STEEL COMP 302 OR |
| STEEL COMP 316 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE HEAD |
| AISI ASSN STD ALL MATERIAL RESPONSES SECONDARY WASHER |
| AISI ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| ASTM A580 ASSN STD ALL MATERIAL RESPONSES SPRING |
| AISI ASSN STD SINGLE MATERIAL RESPONSE STAND-OFF |
| AISI ASSN STD ALL MATERIAL RESPONSES FASTENER |
| SURFACE TREATMENT | ANODIZE HEAD |
| PASSIVATE SECONDARY WASHER |
| PASSIVATE PRIMARY WASHER |
| PASSIVATE SPRING |
| PASSIVATE STAND-OFF |
| PASSIVATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625 TY 3 MIL SPEC SINGLE TREATMENT RESPONSE HEAD |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HEAD STYLE | KNURLED NO. 1 |
| HEAD DIAMETER | 0.510 INCHES MINIMUM AND |
| 0.550 INCHES MAXIMUM |
| HEAD HEIGHT | 0.510 INCHES MINIMUM AND |
| 0.550 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL ACCOMMODATED THICKNESS | 0.094 INCHES MINIMUM AND |
| 0.155 INCHES MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |