PartsTable
Technical Data Sheet
MS21040L3 ✓ 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

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 1010 OVERALL, nut_style: HEXAGON, nut_height: 0.147 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, temp_rating: 500.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-807-1474, 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
MS21040L3
NSN: 5310-00-807-1474
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
nut_styleHEXAGON
nut_height0.147 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
temp_rating500.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
overall_height0.154 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
hardness_rating49.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresTHE ITEM IS A FLIGHT SAFETY CRITICAL AIRCRAFT PART (FSCAP)
thread_directionRIGHT-HAND
NSN5310-00-807-1474
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS21040L3 · 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
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
WASHER THICKNESS: 0.015 INCHES MINIMUM IN
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING: 49.0 ROCKWELL C MAXIMUM
WASHER OUTSIDE DIAMETER: 0.330 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
WASHER THICKNESS0.015 INCHES MINIMUM IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING49.0 ROCKWELL C MAXIMUM
OVERALL HEIGHT0.154 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.330 INCHES MAXIMUM IN
SPECIAL FEATURESTHE ITEM IS A FLIGHT SAFETY CRITICAL AIRCRAFT PART (FSCAP)
LUBRICATIONDRY FILM LUBRICANT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
518/4/91020/001Interchangeable
interchangeable cross-reference
interchangeable
888273Interchangeable
interchangeable cross-reference
interchangeable
FM04A125V1AInterchangeable
interchangeable cross-reference
interchangeable
1-310E004STD6PTNUMERALSInterchangeable
interchangeable cross-reference
interchangeable
2-984-A-017Interchangeable
interchangeable cross-reference
interchangeable
984-017Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21040L3?
MS21040L3 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace MS21040L3?
There are 27 known substitutes for MS21040L3: 518/4/91020/001, 888273, FM04A125V1A and 24 more. Substitute compatibility should be verified for your specific system.
Is MS21040L3 still available?
MS21040L3 is currently cancelled.
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