PartsTable
Technical Data Sheet
MS51922-83 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: HEXAGON, nut_height: 1.360 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 2B, thread_series: UNF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-143-6145, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MS51922-83
NSN: 5310-00-143-6145
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleHEXAGON
nut_height1.360 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class2B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL EXCEPT INSERT
width_across_flats1.801 INCHES MINIMUM AND 1.815 INCHES MAXIMUM IN
nominal_thread_size1.250 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
NSN5310-00-143-6145
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS51922-83 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
THREAD CLASS: 2B
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE: 1.250 INCHES IN
BEARING SURFACE FINISH: 125.0 MICROINCHES
MATERIAL: PLASTIC POLYAMIDE NYLON LOCKING INSERT
THREAD QUANTITY PER INCH: 12
NUT STYLE: HEXAGON
WIDTH ACROSS FLATS: 1.801 INCHES MINIMUM AND 1.815 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE1.250 INCHES IN
BEARING SURFACE FINISH125.0 MICROINCHES
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
THREAD QUANTITY PER INCH12
NUT STYLEHEXAGON
WIDTH ACROSS FLATS1.801 INCHES MINIMUM AND 1.815 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT1.360 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
42646Interchangeable
interchangeable cross-reference
interchangeable
44550Interchangeable
interchangeable cross-reference
interchangeable
M38510/20402BEAInterchangeable
interchangeable cross-reference
interchangeable
722912-50Interchangeable
interchangeable cross-reference
interchangeable
42646-1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-45913/1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51922-83?
MS51922-83 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace MS51922-83?
There are 8 known substitutes for MS51922-83: 42646, 44550, M38510/20402BEA and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51922-83?
MS51922-83 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-143-6145. This indicates validated use in U.S. government and defense supply chains.
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