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953363 ✓ 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

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.230 INCHES NOMINAL IN, locking_feature: PREVAILING TORQUE 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 5310-01-019-2156, 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
953363
NSN: 5310-01-019-2156
FSC: 5310
CAGE: 49956 — RAYTHEON COMPANY DIV CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.230 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.075 INCHES NOMINAL IN
width_across_flats0.432 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
washer_outside_diameter0.573 INCHES NOMINAL IN
thread_quantity_per_inch20
NSN5310-01-019-2156
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 953363 · 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 QUANTITY PER INCH: 20
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
WASHER THICKNESS: 0.075 INCHES NOMINAL IN
•
THREAD CLASS: 3B
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
THREAD QUANTITY PER INCH20
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.250 INCHES IN
WASHER THICKNESS0.075 INCHES NOMINAL IN
THREAD CLASS3B
OVERALL HEIGHT0.230 INCHES NOMINAL IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS0.432 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
14966Interchangeable
interchangeable cross-reference
interchangeable
X3232Interchangeable
interchangeable cross-reference
interchangeable
NAS1496-06Interchangeable
interchangeable cross-reference
interchangeable
ALSFT6-6Interchangeable
interchangeable cross-reference
interchangeable
NAS1496-6Interchangeable
interchangeable cross-reference
interchangeable
861131Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 953363?
953363 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 953363?
There are 15 known substitutes for 953363: 14966, X3232, NAS1496-06 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 953363?
953363 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-019-2156. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026