| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.485 INCHES MINIMUM AND |
| 0.515 INCHES MAXIMUM |
| FASTENER LENGTH | 1.760 INCHES NOMINAL |
| MATERIAL | STEEL COMP 302 OR |
| STEEL COMP 303 OR |
| STEEL COMP 304 OR |
| STEEL COMP 309 OR |
| STEEL COMP 316 OR |
| STEEL COMP 317 OR |
| STEEL COMP 324 OR |
| STEEL COMP 347 SECONDARY WASHER |
| STEEL COMP 302 OR |
| STEEL COMP 305 OR |
| STEEL COMP 310 OR |
| STEEL COMP 321 OR |
| STEEL COMP 322 OR |
| STEEL COMP 347 PRIMARY WASHER |
| STEEL COMP 302 SPRING |
| IRON ALLOY 660 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC ALL MATERIAL RESPONSES OR |
| ASTM A582 ASSN STD ALL MATERIAL RESPONSES OR |
| MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES SECONDARY WASHER |
| QQ-S-763 FED SPEC ALL MATERIAL RESPONSES OR |
| IL-S-5059 MIL SPEC ALL MATERIAL RESPONSES PRIMARY WASHER |
| ASTM A580 ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.230 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.490 INCHES MINIMUM AND |
| 0.505 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL ACCOMMODATED THICKNESS | 0.030 INCHES NOMINAL |
| SPECIAL FEATURES | ITEM PROVIDED WITH A NUT |