| HAMILTON SUNDSTRAND CORPORATION | 99167 |
| NEWPORT AERONAUTICAL SALES | 6065 |
| U S ARMY AVIATION AND MISSILE COMMAND | 18876 |
| AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE | 88044 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| NUT STYLE | HEXAGON |
| NUT HEIGHT | 0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 24 |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| COUNTERSINK ANGLE | 109.0 DEGREES MINIMUM NUT AND 111.0 DEGREES MAXIMUM NUT |
| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE |
| A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see LOCKNUT, ELECTRICAL CONDUIT. See also LOCKNUT, TUBE FITTING. For items having a thickness (or height) exceeding two times the width across the flats, use POST, ELECTRICAL-MECHANICAL EQUIPMENT. (When height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.) |
