| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.625 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |
| STEEL NUT |
| ALUMINUM ALLOY 2024 AND |
| ALUMINUM ALLOY 7075 WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5024 ASSN STD 1ST MATERIAL RESPONSE OR |
| AMS 5020 ASSN STD 2ND MATERIAL RESPONSE OR |
| AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OR |
| AMS 6323 ASSN STD 4TH MATERIAL RESPONSE OR |
| AMS 6325 ASSN STD 5TH MATERIAL RESPONSE OR |
| AMS 6327 ASSN STD ALL MATERIAL RESPONSES OR |
| AMS 6358 ASSN STD 6TH MATERIAL RESPONSE NUT |
| QQ-A-225 FED SPEC 1ST MATERIAL RESPONSE OR |
| QQ-A-250 FED SPEC 2ND MATERIAL RESPONSE WASHER |
| SURFACE TREATMENT | CADMIUM NUT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE NUT |
| MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE WASHER |
| NUT STYLE | FLAT WITH TURNED BACK EDGE |
| WASHER OUTSIDE DIAMETER | 1.209 INCHES NOMINAL |
| OVERALL HEIGHT | 0.802 INCHES MINIMUM AND |
| 0.822 INCHES MAXIMUM |
| NUT HEIGHT | 0.170 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.990 INCHES MINIMUM AND |
| 1.002 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| NUT COUNTERBORE DEPTH | 0.387 INCHES MINIMUM AND |
| 0.407 INCHES MAXIMUM FIRST END |
| COUNTERBORE DIAMETER | 0.760 INCHES MINIMUM AND |
| 0.770 INCHES MAXIMUM FIRST END |
| TEMP RATING | 250.0 DEG FAHRENHEIT MAXIMUM |
| SPECIAL FEATURES | OPPOSITE SLOTS MUST COINCIDE WITHIN 0.005 AND SLOT AXIS MUST BE WITHIN 0.005 OF THREAD PD AXIS; WRENCH TORQUE 750 MIN IN LB; INSTALLATION ASSEMBLY 600 IN LB; LOCKING TORQUE 150 MAX IN LB; TENSILE STRENGTH 10,000 LBS MIN; WEIGHT APPROX 10.20 LBS/100 |
| SUPPLEMENTARY FEATURES | LOCKHEED TECHNICAL MANUAL AAP7211.031-4-27 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT, HEXAGON, CASTELLATED CAPTIVE WASHER, NYLON INSER, 250 DEG F |