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10387709 ✓ 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 CORROSION RESISTING OVERALL, thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 0.250 INCHES NOMINAL IN, overall_diameter: 0.375 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL, 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 5310-00-613-4287, 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
10387709
NSN: 5310-00-613-4287
FSC: 5310
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.250 INCHES NOMINAL IN
overall_diameter0.375 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-613-4287
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10387709 · 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
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.031 INCHES NOMINAL IN
•
OVERALL DIAMETER: 0.375 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.250 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL CORROSION RESISTING OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.031 INCHES NOMINAL IN
OVERALL DIAMETER0.375 INCHES NOMINAL IN
HOLE DIAMETER0.250 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
B88Interchangeable
interchangeable cross-reference
interchangeable
1F4622Interchangeable
interchangeable cross-reference
interchangeable
354080Interchangeable
interchangeable cross-reference
interchangeable
942532Interchangeable
interchangeable cross-reference
interchangeable
111PC2-20Interchangeable
interchangeable cross-reference
interchangeable
7036787Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10387709?
10387709 is a WASHER,FLAT.
What parts can replace 10387709?
There are 12 known substitutes for 10387709: B88, 1F4622, 354080 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 10387709?
10387709 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-613-4287. 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