PartsTable
Technical Data Sheet
12266953-2 ✓ 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 COMP 302 OR STEEL COMP 303 OVERALL, nut_style: HEXAGON, nut_height: 0.199 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: FREE-RUNNING ALL METAL DESIGN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-142-3641, 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
12266953-2
NSN: 5310-01-142-3641
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OVERALL
nut_styleHEXAGON
nut_height0.199 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featureFREE-RUNNING ALL METAL DESIGN
thread_directionRIGHT-HAND
width_across_flats0.4345 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeFLAT
thread_quantity_per_inch20
material_document_and_classificationASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-142-3641
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12266953-2 · 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
LOCKING FEATURE: FREE-RUNNING ALL METAL DESIGN
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH: 20
NOMINAL THREAD SIZE: 0.250 INCHES IN
BEARING SURFACE TYPE: FLAT
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
LOCKING FEATUREFREE-RUNNING ALL METAL DESIGN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH20
NOMINAL THREAD SIZE0.250 INCHES IN
BEARING SURFACE TYPEFLAT
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.199 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.4345 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
50FK420Interchangeable
interchangeable cross-reference
interchangeable
80307Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12266953-2?
12266953-2 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 12266953-2?
There are 2 known substitutes for 12266953-2: 50FK420, 80307. Substitute compatibility should be verified for your specific system.
What is the NSN for 12266953-2?
12266953-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-142-3641. This indicates validated use in U.S. government and defense supply chains.
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