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PartsTable / COMPONENT / MBEU-66857
MBEU-66857 ✓ 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: 0.154 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN, hole_diameter: 1.002 INCHES NOMINAL IN, overall_diameter: 1.552 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 5310-01-125-8281, 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
MBEU-66857
NSN: 5310-01-125-8281
FSC: 5310
CAGE: U1604 — MARTIN-BAKER AIRCRAFT COMPANY LIMITED (GBR)
SPECIFICATIONS
thickness0.154 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
hole_diameter1.002 INCHES NOMINAL IN
overall_diameter1.552 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-125-8281
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MBEU-66857 · 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
•
OVERALL DIAMETER: 1.552 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 1.002 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
THICKNESS: 0.154 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER1.552 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER1.002 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.154 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
8351203Interchangeable
interchangeable cross-reference
interchangeable
033035Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MBEU-66857?
MBEU-66857 is a WASHER,FLAT.
What parts can replace MBEU-66857?
There are 2 known substitutes for MBEU-66857: 8351203, 033035. Substitute compatibility should be verified for your specific system.
What is the NSN for MBEU-66857?
MBEU-66857 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-125-8281. 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