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Technical Data Sheet
PartsTable / COMPONENT / 440NKC-(.091)
440NKC-(.091) ✓ 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 440NKC-(.091) is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-806-2161, 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
440NKC-(.091)
NSN: 5310-00-806-2161
FSC: 5310
CAGE: 86577 — PRECISION METAL PRODUCTS CO (USA)
SPECIFICATIONS
Part Number440NKC-(.091)
NSN5310-00-806-2161
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 440NKC-(.091) · 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
•
PILOT LENGTH: 0.087 INCHES NOMINAL IN
•
NUT DIAMETER: 0.250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
THREAD CLASS: 2B
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 40
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
PILOT LENGTH0.087 INCHES NOMINAL IN
NUT DIAMETER0.250 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH40
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.112 INCHES IN
NUT HEIGHT0.149 INCHES NOMINAL IN
NUT STYLECLINCH
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
S440-3Interchangeable
interchangeable cross-reference
interchangeable
LA493-6Interchangeable
interchangeable cross-reference
interchangeable
0405-06Interchangeable
interchangeable cross-reference
interchangeable
405-6Interchangeable
interchangeable cross-reference
interchangeable
R4BF03-2Interchangeable
interchangeable cross-reference
interchangeable
GN512U440-3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 440NKC-(.091)?
440NKC-(.091) is a 440NKC-(.091).
What parts can replace 440NKC-(.091)?
There are 8 known substitutes for 440NKC-(.091): S440-3, LA493-6, 0405-06 and 5 more. Substitute compatibility should be verified for your specific system.
Is 440NKC-(.091) still available?
440NKC-(.091) 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