| HARDNESS RATING | 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A581 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A582,TY416SFTT2AADPSA000 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 303 OR STEEL COMP 416 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT HEIGHT | 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| NUT DIAMETER | 0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM |
| NUT STYLE | SPLINE |
| PILOT LENGTH | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM |
| PILOT DIAMETER | 0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM |
| SPECIAL FEATURES | NUT HAS EIGHT SLOTS EQUALLY SPACED AND WITHOUT GROOVE IN SIDE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | EI 999-5902-003C MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 2B |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 28 |