| FASTENER LENGTH | 2.500 INCHES NOMINAL2.500 INCHES NOMINAL |
| HEAD DIAMETER | 0.543 INCHES MINIMUM AND 0.543 INCHES MINIMUM AND 0.562 INCHES MAXIMUM0.562 INCHES MAXIMUM |
| HEAD HEIGHT | 0.268 INCHES NOMINAL0.268 INCHES NOMINAL |
| HEAD STYLE | FLAT FILLISTERFLAT FILLISTER |
| INTERNAL DRIVE STYLE | HEXAGONHEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A574 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALLASTM A574 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALLSTEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES0.3125 INCHES |
| THREAD QUANTITY PER INCH | 1818 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC) |
| WIDTH ACROSS FLATS | 0.1875 INCHES NOMINAL0.1875 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.544 INCHES MINIMUM AND 0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM0.562 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM F2833, GRADE 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALLASTM F2833, GRADE 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ALUMINUM AND ALUMINUM AND ZINC OVERALLZINC OVERALL |
| THREAD DIRECTION | RIGHT-HANDRIGHT-HAND |
| THREAD CLASS | 2A2A |
| THREAD LENGTH | 0.375 INCHES NOMINAL0.375 INCHES NOMINAL |