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Technical Data Sheet
31FAF-1210 ✓ 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: 0.884 INCHES MAXIMUM IN, lubrication: SOLUBLE LUBRICANT, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-043-5789, 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
31FAF-1210
NSN: 5310-01-043-5789
FSC: 5310
CAGE: 80539 — SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.884 INCHES MAXIMUM IN
lubricationSOLUBLE LUBRICANT
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-01-043-5789
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 31FAF-1210 · 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 OVERALL
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
BEARING SURFACE FINISH: 125.0 MICROINCHES
NOMINAL THREAD SIZE: 0.750 INCHES IN
BEARING SURFACE TYPE: CHAMFERED
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH: 10
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM OVERALL
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
BEARING SURFACE FINISH125.0 MICROINCHES
NOMINAL THREAD SIZE0.750 INCHES IN
BEARING SURFACE TYPECHAMFERED
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH10
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3B
LUBRICATIONSOLUBLE LUBRICANT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
251286Interchangeable
interchangeable cross-reference
interchangeable
80013Interchangeable
interchangeable cross-reference
interchangeable
120368Interchangeable
interchangeable cross-reference
interchangeable
8862400003-1Interchangeable
interchangeable cross-reference
interchangeable
106-1808Interchangeable
interchangeable cross-reference
interchangeable
80013AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31FAF-1210?
31FAF-1210 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 31FAF-1210?
There are 14 known substitutes for 31FAF-1210: 251286, 80013, 120368 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31FAF-1210?
31FAF-1210 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-043-5789. This indicates validated use in U.S. government and defense supply chains.
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