PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 456720128803
456720128803 ✓ 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,ASSEMBLED WASHE. Key specifications include material: STEEL OVERALL, nut_style: EXTERNAL TOOTH, nut_height: 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.270 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-407-7198, 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
456720128803
NSN: 5310-01-407-7198
FSC: 5310
CAGE: 0000V — NCB HUNGARY (HONVEDSEGI EGYSEGES TERMEKKOD) (HUN)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleEXTERNAL TOOTH
nut_height0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.270 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
washer_outside_diameter0.494 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
thread_quantity_per_inch20
NSN5310-01-407-7198
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 456720128803 · 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: ZINC OVERALL
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
NUT STYLE: EXTERNAL TOOTH
•
WIDTH ACROSS FLATS: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
NUT HEIGHT: 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
•
WASHER OUTSIDE DIAMETER: 0.494 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTZINC OVERALL
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD QUANTITY PER INCH20
OVERALL HEIGHT0.270 INCHES NOMINAL IN
NUT STYLEEXTERNAL TOOTH
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
NUT HEIGHT0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.494 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
271178Interchangeable
interchangeable cross-reference
interchangeable
7228Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 456720128803?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 456720128803?
456720128803 is a NUT,SELF-LOCKING,ASSEMBLED WASHE.
What parts can replace 456720128803?
There are 2 known substitutes for 456720128803: 271178, 7228. Substitute compatibility should be verified for your specific system.
What is the NSN for 456720128803?
456720128803 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-407-7198. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 456720128803

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026