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C396-6 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

C396-6: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL, nut_style: DOUBLE HEXAGON, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF, overall_height: 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-916-5066, 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
C396-6
NSN: 5310-00-916-5066
FSC: 5310 — Nuts and Washers
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleDOUBLE HEXAGON
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
overall_height0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.104 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
NSN5310-00-916-5066
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C396-6 · 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
•
WASHER OUTSIDE DIAMETER: 0.640 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
TEMP RATING: 450.0 FAHRENHEIT NOMINAL DEGF
•
WASHER THICKNESS: 0.104 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.640 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
THREAD SERIESUNF
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
WASHER THICKNESS0.104 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENTCADMIUM OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
52LH7611-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C396-6?
C396-6 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace C396-6?
There is 1 known substitute for C396-6: 52LH7611-6. Substitute compatibility should be verified for your specific system.
What is the NSN for C396-6?
C396-6 is cataloged in the U.S. Government catalog under NSN 5310-00-916-5066. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.