| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| FASTENER LENGTH | 0.800 INCHES MINIMUM AND 0.820 INCHES MAXIMUM |
| GRIP LENGTH | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.5018 INCHES MINIMUM AND 0.5066 INCHES MAXIMUM |
| HEAD STYLE | FLUSH COUNTERSUNK |
| IDENTIFICATION CODE COLOR | BLACK |
| LUBRICATION | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OR AAMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| SHANK DIAMETER | 0.2953 INCHES MINIMUM AND 0.2963 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.0947 INCHES MINIMUM AND 0.0967 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | 294, CAGEC 73197 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ALUMINUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |