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PartsTable / COMPONENT / 3176-EX-388
3176-EX-388 ✓ 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 NUT,PLAIN,HEXAGON is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-481-2277, 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
3176-EX-388
NSN: 5310-01-481-2277
FSC: 5310
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
Part Number3176-EX-388
NSN5310-01-481-2277
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3176-EX-388 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
803-2177917-05X-16Interchangeable
interchangeable cross-reference
interchangeable
803-1385623-04XX-15Interchangeable
interchangeable cross-reference
interchangeable
803-2177917-06X-16Interchangeable
interchangeable cross-reference
interchangeable
1315-071F 400 ITEM 21Interchangeable
interchangeable cross-reference
interchangeable
3176-EX-388Interchangeable
interchangeable cross-reference
interchangeable
1315-071F 4.00IN ITEM 21Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3176-EX-388?
3176-EX-388 is a NUT,PLAIN,HEXAGON.
What parts can replace 3176-EX-388?
There are 8 known substitutes for 3176-EX-388: 803-2177917-05X-16, 803-1385623-04XX-15, 803-2177917-06X-16 and 5 more. Substitute compatibility should be verified for your specific system.
Is 3176-EX-388 still available?
3176-EX-388 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026