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Technical Data Sheet
PartsTable / COMPONENT / 440NKA-(0.056)
440NKA-(0.056) ✓ 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 440NKA-(0.056) is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-027-6138, 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
440NKA-(0.056)
NSN: 5310-00-027-6138
FSC: 5310
CAGE: 86577 — PRECISION METAL PRODUCTS CO (USA)
SPECIFICATIONS
Part Number440NKA-(0.056)
NSN5310-00-027-6138
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 440NKA-(0.056) · 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 QUANTITY PER INCH: 40
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
THREAD CLASS: 2B
•
NUT DIAMETER: 0.250 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
PILOT LENGTH: 0.054 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH40
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.112 INCHES IN
THREAD CLASS2B
NUT DIAMETER0.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
PILOT LENGTH0.054 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY OVERALL
NUT STYLECLINCH
PILOT DIAMETER0.185 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
CLA-440-2Interchangeable
Same NIIN cross-reference
interchangeable
M45938/1-7AInterchangeable
Same NIIN cross-reference
interchangeable
MIL-N-45938/1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 440NKA-(0.056)?
440NKA-(0.056) is a 440NKA-(0.056).
What parts can replace 440NKA-(0.056)?
There are 3 known substitutes for 440NKA-(0.056): CLA-440-2, M45938/1-7A, MIL-N-45938/1. Substitute compatibility should be verified for your specific system.
Is 440NKA-(0.056) still available?
440NKA-(0.056) 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