| FASTENER LENGTH | 0.880 INCHES NOMINAL |
| HARDNESS RATING | 25.0 ROCKWELL C MINIMUM OVERALL AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM |
| HEAD DIAMETER | 0.473 INCHES MINIMUM AND 0.493 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J82 GRADE 120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| PRIMARY WASHER MATERIAL THICKNESS | 0.480 INCHES MINIMUM AND 0.496 INCHES MAXIMUM |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.062 INCHES NOMINAL |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SPECIAL FEATURES | COLOR BLACK |
| WASHER QUANTITY | 1 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BW-659M FSCM 06852 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | DICHROMATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.690 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNC |