| HARDNESS RATING | 28.0 ROCKWELL C MAXIMUM28.0 ROCKWELL C MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385 OVERALL |
| PILOT DIAMETER | 0.369 INCHES MINIMUM AND 0.369 INCHES MINIMUM AND 0.374 INCHES MAXIMUM0.374 INCHES MAXIMUM |
| PILOT LENGTH | 0.110 INCHES MINIMUM AND 0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM0.120 INCHES MAXIMUM |
| NOMINAL THREAD SIZE | 0.250 INCHES0.250 INCHES |
| NUT DIAMETER | 0.435 INCHES MINIMUM AND 0.435 INCHES MINIMUM AND 0.465 INCHES MAXIMUM0.465 INCHES MAXIMUM |
| NUT HEIGHT | 0.235 INCHES MINIMUM AND 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM0.265 INCHES MAXIMUM |
| NUT STYLE | CLINCHCLINCH |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY2,CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT NOMINAL450.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B3B |
| THREAD DIRECTION | RIGHT-HANDRIGHT-HAND |
| THREAD QUANTITY PER INCH | 2020 |
| THREAD SERIES | UNJCUNJC |