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Technical Data Sheet
PartsTable / COMPONENT / 10377?
10377? ✓ 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 10377? is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-500-9267, 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
10377?
NSN: 5310-00-500-9267
FSC: 5310
CAGE: U4574 — FNH UK LTD (GBR)
SPECIFICATIONS
Part Number10377?
NSN5310-00-500-9267
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10377? · 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
•
THREAD CLASS: 3B
•
BEARING SURFACE FINISH: 125.0 MICROINCHES
•
NOMINAL THREAD SIZE: 0.437 INCHES IN
•
THREAD SERIES: UNS
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
THREAD QUANTITY PER INCH: 24
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: PHOSPHATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
BEARING SURFACE FINISH125.0 MICROINCHES
NOMINAL THREAD SIZE0.437 INCHES IN
THREAD SERIESUNS
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH24
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPHOSPHATE OVERALL
NUT STYLESLOTTED, HEXAGON
NUT HEIGHT0.256 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
256-100006-001Interchangeable
interchangeable cross-reference
interchangeable
103-77Interchangeable
interchangeable cross-reference
interchangeable
SM-B-187571Interchangeable
interchangeable cross-reference
interchangeable
700-BR200A1Interchangeable
interchangeable cross-reference
interchangeable
10110Interchangeable
interchangeable cross-reference
interchangeable
01-0101-0377Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10377??
10377? is a 10377?.
What parts can replace 10377??
There are 14 known substitutes for 10377?: 256-100006-001, 103-77, SM-B-187571 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 10377??
10377? is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-500-9267. 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