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Technical Data Sheet
PartsTable / COMPONENT / 3274T999
3274T999 ✓ 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,EYE 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 5310-01-417-3814, 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
3274T999
NSN: 5310-01-417-3814
FSC: 5310
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
Part Number3274T999
NSN5310-01-417-3814
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3274T999 · 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 11
SL5695PC39Interchangeable
interchangeable cross-reference
interchangeable
SL6075PC39Interchangeable
interchangeable cross-reference
interchangeable
SL6539PC35Interchangeable
interchangeable cross-reference
interchangeable
800629PC193Interchangeable
interchangeable cross-reference
interchangeable
ED498-9Interchangeable
interchangeable cross-reference
interchangeable
800629-193Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3274T999?
3274T999 is a NUT,EYE.
What parts can replace 3274T999?
There are 11 known substitutes for 3274T999: SL5695PC39, SL6075PC39, SL6539PC35 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3274T999?
3274T999 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-417-3814. 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