| BEARING SURFACE TYPE | FLAT |
| DEPARTURE FROM CITED DOCUMENT | AS MODIFIED BY THREAD CLASS 2B AND UNPLATED SURF TREAT. |
| HARDNESS RATING | 68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-F-25027,ZYTEL 101 RED MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J403 UNS G12120 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5010 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A563 GRADE A UNS K05802 ASSN STD SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| MATERIAL | PLASTIC POLYAMIDE (NYLON) LOCKING INSERT |
| MATERIAL | STEEL COMP 1212 OVERALL EXCEPT INSERT |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT HEIGHT | 0.329 INCHES MINIMUM AND 0.359 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| SPECIFICATION/STANDARD DATA | 81349-MIL-N-25027 GOVERNMENT SPECIFICATION AND 24617-214279 MANUFACTURERS STANDARD AND 72962-NM-NE MANUFACTURERS STANDARD |
| WIDTH ACROSS FLATS | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| SUPPLEMENTARY FEATURES | MFR 11757 PT LIST 811 SERIES ITEM 16 FOR P/N 1438 PUMP |
| TEMP RATING | 250.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 24 |