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PartsTable / COMPONENT / GN512U440-3
GN512U440-3 ✓ 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,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CLINCH, nut_height: 0.149 INCHES NOMINAL IN, nut_diameter: 0.250 INCHES NOMINAL IN, pilot_length: 0.087 INCHES NOMINAL IN, thread_class: 2B. 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
GN512U440-3
NSN: 5310-00-806-2161
FSC: 5310
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCLINCH
nut_height0.149 INCHES NOMINAL IN
nut_diameter0.250 INCHES NOMINAL IN
pilot_length0.087 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
pilot_diameter0.164 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.112 INCHES IN
thread_quantity_per_inch40
NSN5310-00-806-2161
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GN512U440-3 · 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
440NKC-(.091)Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GN512U440-3?
GN512U440-3 is a NUT,PLAIN,CLINCH.
What parts can replace GN512U440-3?
There are 8 known substitutes for GN512U440-3: S440-3, LA493-6, 0405-06 and 5 more. Substitute compatibility should be verified for your specific system.
Is GN512U440-3 still available?
GN512U440-3 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