| FASTENER LENGTH | 0.438 INCHES NOMINAL |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE IA |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM B16 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM B16 ASSN STD SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| MATERIAL | COPPER ALLOY 360 FASTENER |
| MATERIAL | COPPER ALLOY 360 SECONDARY WASHER |
| MATERIAL | COPPER ALLOY PRIMARY WASHER |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.312 INCHES NOMINAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER MATERIAL THICKNESS | 0.028 INCHES NOMINAL |
| SPECIAL FEATURES | LOCKWASHER WITH 5 PERCENT SPRING TEMPER |
| WASHER QUANTITY | 2 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B456 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | NICKEL OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.312 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNC |