PartsTable
Technical Data Sheet
C396-3 ✓ 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

NUT,PLAIN,EXTENDED WASHER,DOUBLE. Key specifications include material: STEEL OVERALL, nut_style: DOUBLE HEXAGON, temp_rating: 450.0 CELSIUS NOMINAL DEGC, thread_class: 3B, thread_series: UNF, overall_height: 0.187 INCHES MINIMUM AND 0.192 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 5310-00-905-4981, 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
C396-3
NSN: 5310-00-905-4981
FSC: 5310
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleDOUBLE HEXAGON
temp_rating450.0 CELSIUS NOMINAL DEGC
thread_class3B
thread_seriesUNF
overall_height0.187 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
washer_thickness0.056 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.241 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
nominal_thread_size0.190 INCHES IN
washer_outside_diameter0.335 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN
NSN5310-00-905-4981
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C396-3 · 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
MATERIAL: STEEL OVERALL
NOMINAL THREAD SIZE: 0.190 INCHES IN
WASHER THICKNESS: 0.056 INCHES NOMINAL IN
SURFACE TREATMENT: CADMIUM OVERALL
THREAD QUANTITY PER INCH: 32
THREAD SERIES: UNF
NUT STYLE: DOUBLE HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
NOMINAL THREAD SIZE0.190 INCHES IN
WASHER THICKNESS0.056 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
THREAD QUANTITY PER INCH32
THREAD SERIESUNF
NUT STYLEDOUBLE HEXAGON
OVERALL HEIGHT0.187 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
TEMP RATING450.0 CELSIUS NOMINAL DEGC
WIDTH ACROSS FLATS0.241 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
H28-3Interchangeable
interchangeable cross-reference
interchangeable
4691Interchangeable
interchangeable cross-reference
interchangeable
24L1-3Interchangeable
interchangeable cross-reference
interchangeable
5019254Interchangeable
interchangeable cross-reference
interchangeable
35492G1Interchangeable
interchangeable cross-reference
interchangeable
52LH7611-3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C396-3?
C396-3 is a NUT,PLAIN,EXTENDED WASHER,DOUBLE.
What parts can replace C396-3?
There are 6 known substitutes for C396-3: H28-3, 4691, 24L1-3 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C396-3?
C396-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-905-4981. This indicates validated use in U.S. government and defense supply chains.
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