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PartsTable / COMPONENT / 12759-80056
12759-80056 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.121 INCHES NOMINAL IN, hole_diameter: 0.594 INCHES NOMINAL IN, overall_diameter: 1.156 INCHES NOMINAL IN, special_features: PLAIN BLACK FINISH, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-576-5909, 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
12759-80056
NSN: 5310-01-576-5909
FSC: 5310
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.121 INCHES NOMINAL IN
hole_diameter0.594 INCHES NOMINAL IN
overall_diameter1.156 INCHES NOMINAL IN
special_featuresPLAIN BLACK FINISH
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationNAVISTAR
cross-sectional_shape_styleRECTANGULAR
criticality_code_justificationAGAV
NSN5310-01-576-5909
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12759-80056 · 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
•
CRITICALITY CODE JUSTIFICATION: AGAV
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 1.156 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.594 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CRITICALITY CODE JUSTIFICATIONAGAV
SPECIAL FEATURESPLAIN BLACK FINISH
PERIPHERAL SHAPE STYLEROUND
END ITEM IDENTIFICATIONNAVISTAR
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
OVERALL DIAMETER1.156 INCHES NOMINAL IN
HOLE DIAMETER0.594 INCHES NOMINAL IN
THICKNESS0.121 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
33087Interchangeable
interchangeable cross-reference
interchangeable
R-95782 PIECE 9Interchangeable
interchangeable cross-reference
interchangeable
MB129591Interchangeable
interchangeable cross-reference
interchangeable
010-0490-00-0Interchangeable
interchangeable cross-reference
interchangeable
33057Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12759-80056?
12759-80056 is a WASHER,FLAT.
What parts can replace 12759-80056?
There are 5 known substitutes for 12759-80056: 33087, R-95782 PIECE 9, MB129591 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12759-80056?
12759-80056 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-576-5909. 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