| FASTENER LENGTH | 1.530 INCHES NOMINAL |
| HEAD HEIGHT | 0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| HEAD STYLE | DISHED HEXAGON |
| INTERNAL DRIVE STYLE | TORQUE |
| MATERIAL ACCOMMODATED THICKNESS | 0.030 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER OR AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A580 ASSN STD ALL MATERIAL RESPONSES SPRING |
| MATERIAL | IRON ALLOY 660 FASTENER |
| MATERIAL | STEEL COMP 305 SPRING OR STEEL COMP 304 SPRING OR STEEL COMP 309 SPRING OR STEEL COMP 314 SPRING OR STEEL COMP 316L SPRING |
| MATERIAL | STEEL COMP 302 PRIMARY WASHER OR STEEL COMP 302B PRIMARY WASHER OR STEEL COMP 303 PRIMARY WASHER OR STEEL COMP 303 PRIMARY WASHER OR STEEL COMP 303CU PRIMARY WASHER OR STEEL COMP 303MA PRIMARY WASHER OR STEEL COMP 304 PRIMARY WASHER OR STEEL COMP 304L PRIMARY WASHER OR STEEL COMP 303 PLUS X PRIMARY WASHER OR STEEL COMP 303SE PRIMARY WASHER |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SPECIAL FEATURES | ITEM CONSIST OF A NUT MATERIAL STEEL COMP 303 |
| 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 CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.422 INCHES MINIMUM AND 0.452 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |