| FINMECCANICA SPA | A0199 |
| HONEYWELL INTERNATIONAL INC. | 6848 |
| EMBRAER S.A. DBA EMBRAER | 001JK |
| EMBRAER EMPRESA BRASILEIRA DE AERONAUTICA SA | S4956 |
| PIPER AIRCRAFT INC. | 77294 |
| E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE | SCY13 |
| DEFENSE REDUCTION AGENCY | 32345 |
| NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | 80205 |
| AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE | 88044 |
| ALL-SYSTEM AEROSPACE INT'L INC | 8R471 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| NUT STYLE | SLOTTED, HEXAGON |
| NUT HEIGHT | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 28 |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| MATERIAL | STEEL OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| A nut having a flat bearing surface and 6 flat sides with slots in its upper portion. It is designed to provide positive locking when used with a solid or split (cotter) pin. Excludes NUT (1), PLAIN, CASTELLATED, HEXAGON. |
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