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PartsTable / COMPONENT / C396-5
C396-5 ✓ 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

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: 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-916-5065, 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
C396-5
NSN: 5310-00-916-5065
FSC: 5310
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_height0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.091 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.366 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
NSN5310-00-916-5065
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C396-5 · 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: 24
•
NUT STYLE: DOUBLE HEXAGON
•
TEMP RATING: 450.0 FAHRENHEIT NOMINAL DEGF
•
THREAD CLASS: 3B
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
WIDTH ACROSS FLATS: 0.366 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH24
NUT STYLEDOUBLE HEXAGON
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
THREAD CLASS3B
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
NOMINAL THREAD SIZE0.312 INCHES IN
WIDTH ACROSS FLATS0.366 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
WASHER THICKNESS0.091 INCHES NOMINAL IN
OVERALL HEIGHT0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
H-28Interchangeable
interchangeable cross-reference
interchangeable
11200223-1Interchangeable
interchangeable cross-reference
interchangeable
10084577Interchangeable
interchangeable cross-reference
interchangeable
PR-H-285Interchangeable
interchangeable cross-reference
interchangeable
H-285Interchangeable
interchangeable cross-reference
interchangeable
4030937Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C396-5?
C396-5 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace C396-5?
There are 7 known substitutes for C396-5: H-28, 11200223-1, 10084577 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C396-5?
C396-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-916-5065. 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