| FASTENER LENGTH | 2.828 INCHES MINIMUM AND 2.875 INCHES MAXIMUM | 
| FEATURES PROVIDED | FINISHED HEAD | 
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM  AND 40.0 ROCKWELL C MAXIMUM OVERALL | 
| HEAD HEIGHT | 0.219 INCHES NOMINAL | 
| HEAD STYLE | HEXAGON | 
| HOLE CONFIGURATION STYLE | HEXAGON CORNERS | 
| HOLE DIAMETER | 0.070 INCHES NOMINAL | 
| HOLE QUANTITY | 3 | 
| HOLE TYPE | DRILLED | 
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE  OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE  OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE  OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE  OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE  OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL | 
| MATERIAL | STEEL COMP 4140  OR STEEL COMP 8740  OR STEEL COMP 8630  OR STEEL COMP 8735  OR STEEL COMP 4130  OR STEEL COMP 4037 OVERALL | 
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | 
| NOMINAL THREAD DIAMETER | 0.250 INCHES | 
| SPECIFICATION/STANDARD DATA | 80205-NAS564 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | 
| SURFACE TREATMENT | CADMIUM  AND CHROMATE OVERALL | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 2.697 INCHES MINIMUM AND 2.845 INCHES MAXIMUM | 
| THREAD QUANTITY PER INCH | 28 | 
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | 
| WIDTH BETWEEN FLATS | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |