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