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C21046 — NUT,SELF-LOCKING,BLIND RIVET

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

C21046: NUT,SELF-LOCKING,BLIND RIVET.

The NUT,SELF-LOCKING,BLIND RIVET is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 NUT, nut_style: ROUND, lubrication: DRY FILM LUBRICANT, nut_diameter: 0.5181 INCHES MINIMUM AND 0.5208 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 1.698 INCHES MINIMUM AND 1.757 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-653-6485, 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
C21046
NSN: 5310-01-653-6485
NIINs: 016536485, 016536490, 016549024, 016872136
FSC: 5310 — Nuts and Washers
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 304 NUT
nut_styleROUND
lubricationDRY FILM LUBRICANT
nut_diameter0.5181 INCHES MINIMUM AND 0.5208 INCHES MAXIMUM IN
thread_class3B
nut_thickness1.698 INCHES MINIMUM AND 1.757 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featureFREE-RUNNING ALL METAL DESIGN
special_featuresGRIP LENGTH 0.900 INCH IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE NUT
nominal_thread_size0.3750 INCHES IN
NSN5310-01-653-6485
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C21046 · 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
•
LUBRICATION: DRY FILM LUBRICANT
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
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NUT DIAMETER: 0.518 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
MATERIAL: STEEL COMP 304 NUT
TECHNICAL CHARACTERISTICS
LUBRICATIONDRY FILM LUBRICANT
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
NUT DIAMETER0.518 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
THREAD CLASS2A A
MATERIALSTEEL COMP 304 NUT
MATERIALSTEEL COMP 305 CAP
SUBSTITUTES & CROSS-REFERENCES 1
C21046-6-17Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C21046?
C21046 is a NUT,SELF-LOCKING,BLIND RIVET.
What parts can replace C21046?
There is 1 known substitute for C21046: C21046-6-17. Substitute compatibility should be verified for your specific system.
What is the NSN for C21046?
C21046 is cataloged in the U.S. Government catalog under NSN 5310-01-653-6485. 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.