PartsTable
Technical Data Sheet
L31163 ✓ 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, nut_style: HEXAGON, nut_height: 0.469 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-814-0672, 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
L31163
NSN: 5310-00-814-0672
FSC: 5310
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.469 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL EXCEPT INSERT
width_across_flats0.551 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-00-814-0672
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: L31163 · 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
THREAD SERIES: UNF
THREAD QUANTITY PER INCH: 24
BEARING SURFACE TYPE: CHAMFERED
TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
WIDTH ACROSS FLATS: 0.551 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
NOMINAL THREAD SIZE: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
THREAD SERIESUNF
THREAD QUANTITY PER INCH24
BEARING SURFACE TYPECHAMFERED
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
WIDTH ACROSS FLATS0.551 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMRAP - COUGAR CAT1 A2
NOMINAL THREAD SIZE0.375 INCHES IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
THREAD CLASS3B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
MIL-DTL-45913/3Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-16FG8CInterchangeable
interchangeable cross-reference
interchangeable
MS51943-50Interchangeable
interchangeable cross-reference
interchangeable
MS51943-12Interchangeable
interchangeable cross-reference
interchangeable
M45913/3-9FG8PInterchangeable
interchangeable cross-reference
interchangeable
23113Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is L31163?
L31163 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace L31163?
There are 24 known substitutes for L31163: MIL-DTL-45913/3, M45913/3-16FG8C, MS51943-50 and 21 more. Substitute compatibility should be verified for your specific system.
Is L31163 still available?
L31163 is currently cancelled.
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