| MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |
| MATERIAL | STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 4340 NUT |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.375 INCHES |
| NUT COUNTERBORE DEPTH | 0.111 INCHES MINIMUM AND 0.131 INCHES MAXIMUM NUT |
| NUT DIAMETER | 0.613 INCHES MINIMUM AND 0.616 INCHES MAXIMUM |
| NUT LENGTH | 0.750 INCHES NOMINAL |
| NUT HEIGHT | 0.508 INCHES NOMINAL |
| NUT STYLE | FLOATING SELF-LOCKING BARREL |
| BARREL HEIGHT | 0.447 INCHES MINIMUM AND 0.467 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.401 INCHES MINIMUM AND 0.411 INCHES MAXIMUM NUT |
| CRITICALITY CODE JUSTIFICATION | FEAT |
| FEATURES PROVIDED | FLOATING NUT |
| HARDNESS RATING | 29.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD 2ND MATERIAL RESPONSE OR 66 FED STD 3RD MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 4TH MATERIAL RESPONSE NUT |
| SPECIAL FEATURES | WEAPON SYSTEM ESSENTIAL. |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT | CADMIUM OVERALL EXCEPT INSERT |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNJF |