PartsTable
Technical Data Sheet
5210121 PART 22 ✓ 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: STEEL OVERALL EXCEPT INSERT, nut_style: HEXAGON, nut_height: 0.890 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-409-3333, 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
5210121 PART 22
NSN: 5310-00-409-3333
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL EXCEPT INSERT
nut_styleHEXAGON
nut_height0.890 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL EXCEPT INSERT
width_across_flats1.088 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
NSN5310-00-409-3333
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5210121 PART 22 · 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
MATERIAL: PLASTIC POLYAMIDE NYLON LOCKING INSERT
LUBRICATION: DRY FILM LUBRICANT
NUT HEIGHT: 0.890 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH: 10
BEARING SURFACE FINISH: 110.0 MICROINCHES
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE: 0.750 INCHES IN
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
LUBRICATIONDRY FILM LUBRICANT
NUT HEIGHT0.890 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH10
BEARING SURFACE FINISH110.0 MICROINCHES
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
WIDTH ACROSS FLATS1.088 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
5310PL0773984Interchangeable
interchangeable cross-reference
interchangeable
MS51943-34Interchangeable
interchangeable cross-reference
interchangeable
71143-34Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-7FG8PInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-45913/3AInterchangeable
interchangeable cross-reference
interchangeable
MS51943-8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5210121 PART 22?
5210121 PART 22 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 5210121 PART 22?
There are 19 known substitutes for 5210121 PART 22: 5310PL0773984, MS51943-34, 71143-34 and 16 more. Substitute compatibility should be verified for your specific system.
Is 5210121 PART 22 still available?
5210121 PART 22 is currently cancelled.
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