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MS21066-3-16-2 — NUT ASSEMBLY,SELF-LOCKING,GANG C

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS21066-3-16-2: NUT ASSEMBLY,SELF-LOCKING,GANG C.

NUT ASSEMBLY,SELF-LOCKING,GANG C. Key specifications include material: ALUMINUM ALLOY 2024 CHANNEL, nut_spacing: 2.000 INCHES NOMINAL IN, thread_class: 3B, overall_width: 0.593 INCHES MAXIMUM IN, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-398-3064, 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
MS21066-3-16-2
NSN: 5310-01-398-3064
FSC: 5310 — Nuts and Washers
CAGE: 8DV22 — AMERICAN AEROSPACE COMPONENTS LLC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 CHANNEL
nut_spacing2.000 INCHES NOMINAL IN
nut_quantity2
thread_class3B
overall_width0.593 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
features_providedFLOATING NUT
surface_treatmentCADMIUM NUT
nominal_thread_size0.190 INCHES IN
assembly_overall_height0.281 INCHES MAXIMUM IN
thread_quantity_per_inch32
NSN5310-01-398-3064
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS21066-3-16-2 · 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 SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
NUT QUANTITY: 2
•
FEATURES PROVIDED: FLOATING NUT
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
ASSEMBLY OVERALL HEIGHT: 0.281 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM NUT
TECHNICAL CHARACTERISTICS
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
NUT QUANTITY2
OVERALL WIDTH0.593 INCHES MAXIMUM IN
FEATURES PROVIDEDFLOATING NUT
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.190 INCHES IN
ASSEMBLY OVERALL HEIGHT0.281 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM NUT
THREAD CLASS3B
THREAD QUANTITY PER INCH32
SUBSTITUTES & CROSS-REFERENCES 1
NASM21066Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS21066-3-16-2?
MS21066-3-16-2 is a NUT ASSEMBLY,SELF-LOCKING,GANG C.
What parts can replace MS21066-3-16-2?
There is 1 known substitute for MS21066-3-16-2: NASM21066. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21066-3-16-2?
MS21066-3-16-2 is cataloged in the U.S. Government catalog under NSN 5310-01-398-3064. 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.