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PartsTable / COMPONENT / 6864856
6864856 ✓ 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: 0.125 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, thread_class: 3B, thread_series: UNJC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-104-7979, 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
6864856
NSN: 5310-00-104-7979
FSC: 5310
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.125 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
thread_class3B
thread_seriesUNJC
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.240 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
nominal_thread_size0.112 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-00-104-7979
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6864856 · 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
•
NUT HEIGHT: 0.125 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
THREAD QUANTITY PER INCH: 40
•
BEARING SURFACE TYPE: CHAMFERED
•
THREAD SERIES: UNJC
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
NUT HEIGHT0.125 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.112 INCHES IN
THREAD QUANTITY PER INCH40
BEARING SURFACE TYPECHAMFERED
THREAD SERIESUNJC
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3B
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
20804Interchangeable
interchangeable cross-reference
interchangeable
18657Interchangeable
interchangeable cross-reference
interchangeable
H1004Interchangeable
interchangeable cross-reference
interchangeable
8526631Interchangeable
interchangeable cross-reference
interchangeable
10121486Interchangeable
interchangeable cross-reference
interchangeable
BACN10JC04Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6864856?
6864856 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 6864856?
There are 12 known substitutes for 6864856: 20804, 18657, H1004 and 9 more. Substitute compatibility should be verified for your specific system.
Is 6864856 still available?
6864856 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026