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PartsTable / COMPONENT / 4500291-2
4500291-2 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 1.625 INCHES NOMINAL IN, overall_diameter: 2.500 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND, cross-sectional_shape_style: RECTANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-352-3085, 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
4500291-2
NSN: 5310-00-352-3085
FSC: 5310
CAGE: 6N299 — AGCO CORP PARTS OPN (USA)
SPECIFICATIONS
thickness0.031 INCHES NOMINAL IN
hole_diameter1.625 INCHES NOMINAL IN
overall_diameter2.500 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-G-12803 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-352-3085
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4500291-2 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.625 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.031 INCHES NOMINAL IN
•
OVERALL DIAMETER: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.625 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.031 INCHES NOMINAL IN
OVERALL DIAMETER2.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
B29.100 60-2Interchangeable
interchangeable cross-reference
interchangeable
B29.1Interchangeable
interchangeable cross-reference
interchangeable
B291Interchangeable
interchangeable cross-reference
interchangeable
B291CInterchangeable
interchangeable cross-reference
interchangeable
1AB291Interchangeable
interchangeable cross-reference
interchangeable
68B618000-291Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4500291-2?
4500291-2 is a WASHER,FLAT.
What parts can replace 4500291-2?
There are 15 known substitutes for 4500291-2: B29.100 60-2, B29.1, B291 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4500291-2?
4500291-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-352-3085. 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