PartsTable
Technical Data Sheet
801-6404951-15 ✓ 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: NICKEL ALLOY AND COPPER ALLOY OVERALL EXCEPT INSERT, nut_style: HEXAGON, nut_height: 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNJC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-385-5986, 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
801-6404951-15
NSN: 5310-01-385-5986
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY AND COPPER ALLOY OVERALL EXCEPT INSERT
nut_styleHEXAGON
nut_height1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT MAXIMUM DEGF
thread_class3B
thread_seriesUNJC
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES NOMINAL BASE
width_across_flats1.427 INCHES MINIMUM AND 1.446 INCHES MAXIMUM IN
nominal_thread_size0.875 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-01-385-5986
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 801-6404951-15 · 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
THREAD CLASS: 3B
THREAD SERIES: UNJC
THREAD QUANTITY PER INCH: 9
WIDTH ACROSS FLATS: 1.427 INCHES MINIMUM AND 1.446 INCHES MAXIMUM IN
NUT STYLE: HEXAGON
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
NOMINAL THREAD SIZE: 0.875 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
END ITEM IDENTIFICATION34 INCH TITANIUM BUTTERFLY VALVE ON NUC SUB IN
THREAD SERIESUNJC
THREAD QUANTITY PER INCH9
WIDTH ACROSS FLATS1.427 INCHES MINIMUM AND 1.446 INCHES MAXIMUM IN
NUT STYLEHEXAGON
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NOMINAL THREAD SIZE0.875 INCHES IN
NUT HEIGHT1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
TEMP RATING250.0 FAHRENHEIT MAXIMUM DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
ESNA 09NU-149Interchangeable
interchangeable cross-reference
interchangeable
PL-999R0501 FIND 76L1Interchangeable
interchangeable cross-reference
interchangeable
PL-999R0501-D FIND 76Interchangeable
interchangeable cross-reference
interchangeable
S862-2LB5-1032Interchangeable
interchangeable cross-reference
interchangeable
MILN25027Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-32258Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 801-6404951-15?
801-6404951-15 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 801-6404951-15?
There are 33 known substitutes for 801-6404951-15: ESNA 09NU-149, PL-999R0501 FIND 76L1, PL-999R0501-D FIND 76 and 30 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6404951-15?
801-6404951-15 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-385-5986. This indicates validated use in U.S. government and defense supply chains.
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