PartsTable
Technical Data Sheet
MS21083N20 ✓ 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 NUT, nut_style: HEXAGON, nut_height: 0.766 INCHES MAXIMUM IN, lubrication: SOLUBLE LUBRICANT, temp_rating: 250.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-016-7142, 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
MS21083N20
NSN: 5310-00-016-7142
FSC: 5310
CAGE: 21439 — CURTISS-WRIGHT FLOW CONTROL SERVICE, LLC DBA ENGINEERED ARRESTING SYSTEMS - ESCO DIV CW FLOW CONTROL SVC LLC DBA (USA)
SPECIFICATIONS
materialSTEEL NUT
nut_styleHEXAGON
nut_height0.766 INCHES MAXIMUM IN
lubricationSOLUBLE LUBRICANT
temp_rating250.0 FAHRENHEIT MAXIMUM DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
hardness_rating35.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES MINIMUM NUT
surface_treatmentCADMIUM AND CHROMATE OVERALL EXCEPT INSERT
NSN5310-00-016-7142
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS21083N20 · 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
NUT STYLE: HEXAGON
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL EXCEPT INSERT
THREAD CLASS: 3B
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL: STEEL NUT
BEARING SURFACE FINISH: 125.0 MICROINCHES
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL EXCEPT INSERT
THREAD CLASS3B
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
MATERIALSTEEL NUT
BEARING SURFACE FINISH125.0 MICROINCHES
THREAD DIRECTIONRIGHT-HAND
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
HARDNESS RATING35.0 ROCKWELL C MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
305-32Interchangeable
interchangeable cross-reference
interchangeable
702 5X1X1-1/4Interchangeable
interchangeable cross-reference
interchangeable
B363Interchangeable
interchangeable cross-reference
interchangeable
A101-741Interchangeable
interchangeable cross-reference
interchangeable
1741-1Interchangeable
interchangeable cross-reference
interchangeable
09016150Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21083N20?
MS21083N20 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace MS21083N20?
There are 19 known substitutes for MS21083N20: 305-32, 702 5X1X1-1/4, B363 and 16 more. Substitute compatibility should be verified for your specific system.
Is MS21083N20 still available?
MS21083N20 is currently cancelled.
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