| FASTENER LENGTH | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM |
| HEAD DIAMETER | 0.390 INCHES MINIMUM AND 0.420 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE II |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5640 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-W-423 FED SPEC ALL MATERIAL RESPONSES SPRING |
| MATERIAL | STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 321 OR STEEL COMP 347 SPRING |
| MATERIAL | STEEL COMP 303 OR STEEL COMP 305 FASTENER |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| 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 | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 28 |