1680-00-961-8388 CRANK ASSEMBLY,EMER Index 5310-00-961-8391 NUT,SELF-LOCKING,SLOTTED,HEXAGON

National Stock Number:
5310-00-961-8390

Federal Supply Class:
5310

National Item Identification Number:
009618390

Description:
NUT,SELF-LOCKING,SLOTTED,HEXAGON

Detail:
A NUT HAVING A FLAT BEARING SURFACE AND 6 FLAT SIDES WITH SLOTS IN ITS UPPER PORTION. AN INTEGRAL FEATURE IS INCORPORATED FOR LOCKING ON THE THREADS OF A MATING MEMBER. THE SLOTS, WHEN USED IN CONJUNCTION WITH A SOLID OR SPLIT (COTTER) PIN, ACT AS AN EXTRA "FAIL SAFE", FEATURE IN CRITICAL APPLICATIONS. EXCLUDES NUT (1), SELF-LOCKING, CASTELLATED, OCTAGON.


Manufacturer Information:
10121892A486GNIMIKKEISTOKESKUS NCB FINLAND
5310PL01997609009HINSPEKTORAT WSPARCIA SIL ZBROJNYCH
F12NE4753-048019L2ESNA, LLC
F12NE4753-04872962HARVARD INDUSTRIES INC
938.08.71.204S4080PILATUS AIRCRAFT LTD
9380871204S4080PILATUS AIRCRAFT LTD
F12NEC42827687GREER STOP NUT INC.
MS17825-427687GREER STOP NUT INC.
PCR6462554ALCOA GLOBAL FASTENERS INC. DBA SIMMONDS MECAERO FAS PDTS DIV SIMMONDS MECAERO FAS PDTS
MS17825-496906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
MS17825-4A0126LEONARDO SPA HELICOPTERS DIVISION -PRODUCTION SITE
MS17825-4AC910AERTEKNO S.R.L.
MS17825-4K0668LEONARDO UK LTD


Techincal Specification:
BEARING SURFACE TYPEWASHER FACED
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
MATERIALPLASTIC POLYAMIDE (NYLON) LOCKING INSERT
MATERIALSTEEL NUT
NOMINAL THREAD SIZE0.250 INCHES
NUT HEIGHT0.266 INCHES MINIMUM AND 0.296 INCHES MAXIMUM
NUT STYLESLOTTED, HEXAGON
WIDTH ACROSS FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL EXCEPT INSERT
TEMP RATING250.0 FAHRENHEIT NOMINAL
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
THREAD SERIESUNJF
THREAD QUANTITY PER INCH28


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