| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM |
| MATERIAL | STEEL COMP 1050 WASHER OR STEEL COMP 1551 WASHER OR STEEL COMP 1552 WASHER OR STEEL COMP 1053 WASHER OR STEEL COMP 1055 WASHER OR STEEL COMP 1059 WASHER OR STEEL COMP 1060 WASHER OR STEEL COMP 1561 WASHER OR STEEL COMP 1064 WASHER OR STEEL COMP 1065 WASHER OR STEEL COMP 1566 WASHER |
| MATERIAL | STEEL NUT |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT HEIGHT | 0.219 INCHES MINIMUM AND 0.225 INCHES MAXIMUM |
| NUT STYLE | DISHED TOOTH |
| OVERALL HEIGHT | 0.281 INCHES MINIMUM AND 0.306 INCHES MAXIMUM |
| WASHER OUTSIDE DIAMETER | 0.750 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.4230 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | GM-6047-M,FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNC |