| ALLIANT TECHSYSTEMS INC | 405 |
| COOPER INDUSTRIES INC COOPER PETROLEUM EQUIPMENT DIV SUNNYVALE OPERATION | 4861 |
| ORBITAL ATK, INC. | 0MVU3 |
| UNITED TECHNOLOGIES CORPORATION | 77445 |
| MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | 96906 |
| DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA | 14153 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| NUT STYLE | HEXAGON |
| NUT HEIGHT | 0.219 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| COUNTERSINK ANGLE | 90.0 DEGREES NOMINAL NUT |
| BEARING SURFACE TYPE | WASHER FACED |
| BEARING SURFACE FINISH | 63.0 MICROINCHES |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| PRECIOUS MATERIAL | SILVER |
| SURFACE TREATMENT | SILVER OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| NUT STYLE | HEXAGON |
| NUT HEIGHT | 0.219 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| COUNTERSINK ANGLE | 90.0 DEGREES NOMINAL NUT |
| BEARING SURFACE TYPE | WASHER FACED |
| BEARING SURFACE FINISH | 63.0 MICROINCHES |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| PRECIOUS MATERIAL | SILVER |
| SURFACE TREATMENT | SILVER OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| 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.) |
