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K-6643225-011 — NUT,SLEEVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

K-6643225-011: NUT,SLEEVE.

The NUT,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SLEEVE, nut_length: 3.760 INCHES NOMINAL IN, nut_diameter: 3.880 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-029-1296, 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
K-6643225-011
NSN: 5310-01-029-1296
NIINs: 010291296, 015456526
FSC: 5310 — Nuts and Washers
CAGE: 01289 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLEEVE
nut_length3.760 INCHES NOMINAL IN
nut_diameter3.880 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
boss_thickness1.260 INCHES NOMINAL OVERALL IN
thread_directionRIGHT-HAND
surface_treatmentCOPPER OVERALL
nominal_thread_size2.500 INCHES IN
counterbore_diameter2.620 INCHES NOMINAL NUT IN
cross-sectional_shapeROUND BOSS
NSN5310-01-029-1296
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K-6643225-011 · 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
•
NUT LENGTH: 3.760 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
NUT COUNTERBORE DEPTH: 3.120 INCHES NOMINAL NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.500 INCHES IN
•
NUT DIAMETER: 3.880 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 2.620 INCHES NOMINAL NUT IN
•
BOSS THICKNESS: 1.260 INCHES NOMINAL OVERALL IN
TECHNICAL CHARACTERISTICS
NUT LENGTH3.760 INCHES NOMINAL IN
THREAD SERIESUN
NUT COUNTERBORE DEPTH3.120 INCHES NOMINAL NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.500 INCHES IN
NUT DIAMETER3.880 INCHES NOMINAL IN
COUNTERBORE DIAMETER2.620 INCHES NOMINAL NUT IN
BOSS THICKNESS1.260 INCHES NOMINAL OVERALL IN
BOSS WIDTH ACROSS FLATS1.880 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPEROUND NUT
SUBSTITUTES & CROSS-REFERENCES 2
6643225-11Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
6643198-11Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 K-6643225-011?
K-6643225-011 is a NUT,SLEEVE.
What parts can replace K-6643225-011?
There are 2 known substitutes for K-6643225-011: 6643225-11, 6643198-11. Substitute compatibility should be verified for your specific system.
What is the NSN for K-6643225-011?
K-6643225-011 is cataloged in the U.S. Government catalog under NSN 5310-01-029-1296. 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.