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DA6371 ✓ 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: COPPER ALLOY 938 OVERALL, thickness: 0.21875 INCHES MINIMUM AND 0.22175 INCHES MAXIMUM IN, hole_diameter: 1.001 INCHES MINIMUM AND 1.006 INCHES MAXIMUM IN, overall_diameter: 1.438 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 5310-00-262-2305, 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
DA6371
NSN: 5310-00-262-2305
FSC: 5310
CAGE: 81601 — NORFOLK NAVAL SHIPYARD (USA)
SPECIFICATIONS
materialCOPPER ALLOY 938 OVERALL
thickness0.21875 INCHES MINIMUM AND 0.22175 INCHES MAXIMUM IN
hole_diameter1.001 INCHES MINIMUM AND 1.006 INCHES MAXIMUM IN
overall_diameter1.438 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-262-2305
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: DA6371 · 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: 1.438 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY 938 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.21875 INCHES MINIMUM AND 0.22175 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.001 INCHES MINIMUM AND 1.006 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER1.438 INCHES NOMINAL IN
MATERIALCOPPER ALLOY 938 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.21875 INCHES MINIMUM AND 0.22175 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.001 INCHES MINIMUM AND 1.006 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
6371Interchangeable
interchangeable cross-reference
interchangeable
R103B15Interchangeable
interchangeable cross-reference
interchangeable
D14131-15Interchangeable
interchangeable cross-reference
interchangeable
A-129766Interchangeable
interchangeable cross-reference
interchangeable
129766Interchangeable
interchangeable cross-reference
interchangeable
MILF2692Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is DA6371?
DA6371 is a WASHER,FLAT.
What parts can replace DA6371?
There are 18 known substitutes for DA6371: 6371, R103B15, D14131-15 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for DA6371?
DA6371 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-262-2305. 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