| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.267 INCHES MINIMUM AND |
| 0.312 INCHES MAXIMUM |
| FASTENER LENGTH | 1.168 INCHES MINIMUM AND |
| 1.198 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 301 SECONDARY WASHER |
| STEEL COMP 302 PRIMARY WASHER |
| STEEL COMP 302 SPRING |
| STEEL COMP 304 STAND-OFF |
| STEEL COMP 302 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| ASTM A493 ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| AMS 5688 ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| QQ-S-753 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| ASTM A493 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | OXIDE SECONDARY WASHER |
| OXIDE PRIMARY WASHER |
| PASSIVATE SPRING |
| OXIDE STAND-OFF |
| OXIDE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HEAD STYLE | KNURLED NO. 2 |
| HEAD DIAMETER | 0.467 INCHES MINIMUM AND |
| 0.497 INCHES MAXIMUM |
| HEAD HEIGHT | 0.145 INCHES MINIMUM AND |
| 0.175 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL ACCOMMODATED THICKNESS | 0.209 INCHES MINIMUM AND |
| 0.229 INCHES MAXIMUM |