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A61789 ✓ 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 COMP 302 OR STEEL COMP 304 OVERALL, thickness: 0.032 INCHES NOMINAL IN, hole_diameter: 0.550 INCHES NOMINAL IN, overall_diameter: 0.680 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_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 5310-01-469-1572, 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
A61789
NSN: 5310-01-469-1572
FSC: 5310
CAGE: 86090 — EATON CORPORATION DBA AIRFRAME DIV FUEL & MOTION CONTROL SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 304 OVERALL
thickness0.032 INCHES NOMINAL IN
hole_diameter0.550 INCHES NOMINAL IN
overall_diameter0.680 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationFULL MANAGEME:WSD;AIRCRAFT,B-2 BOMBER(ATB)
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5513 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-763 CRES COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-469-1572
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A61789 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5513 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-763 CRES COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THICKNESS: 0.032 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.550 INCHES NOMINAL IN
•
OVERALL DIAMETER: 0.680 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 304 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5513 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-763 CRES COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THICKNESS0.032 INCHES NOMINAL IN
HOLE DIAMETER0.550 INCHES NOMINAL IN
END ITEM IDENTIFICATIONFULL MANAGEME:WSD;AIRCRAFT,B-2 BOMBER(ATB)
OVERALL DIAMETER0.680 INCHES NOMINAL IN
MATERIALSTEEL COMP 302 OR STEEL COMP 304 OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
211674Interchangeable
interchangeable cross-reference
interchangeable
6A525REVEInterchangeable
interchangeable cross-reference
interchangeable
5068571Interchangeable
interchangeable cross-reference
interchangeable
632-09338Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A61789?
A61789 is a WASHER,FLAT.
What parts can replace A61789?
There are 4 known substitutes for A61789: 211674, 6A525REVE, 5068571 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A61789?
A61789 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-469-1572. 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