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6643235-017 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6643235-017: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 1.679 INCHES MINIMUM AND 1.759 INCHES MAXIMUM IN, temp_rating: 751.0 FAHRENHEIT MINIMUM AND 950.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 2B, thread_series: UN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-227-3365, 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
6643235-017
NSN: 5310-01-227-3365
FSC: 5310 — Nuts and Washers
CAGE: 01289 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height1.679 INCHES MINIMUM AND 1.759 INCHES MAXIMUM IN
temp_rating751.0 FAHRENHEIT MINIMUM AND 950.0 FAHRENHEIT MAXIMUM DEGF
thread_class2B
thread_seriesUN
thread_directionRIGHT-HAND
surface_treatmentCOPPER OVERALL
width_across_flats2.662 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
nominal_thread_size1.750 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch8
NSN5310-01-227-3365
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6643235-017 · 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
•
WIDTH ACROSS FLATS: 2.662 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
•
THREAD SERIES: UN
•
TEMP RATING: 751.0 FAHRENHEIT MINIMUM AND 950.0 FAHRENHEIT MAXIMUM DEGF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.750 INCHES IN
•
NUT HEIGHT: 1.679 INCHES MINIMUM AND 1.759 INCHES MAXIMUM IN
•
SURFACE TREATMENT: COPPER OVERALL
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS2.662 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
THREAD SERIESUN
TEMP RATING751.0 FAHRENHEIT MINIMUM AND 950.0 FAHRENHEIT MAXIMUM DEGF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.750 INCHES IN
NUT HEIGHT1.679 INCHES MINIMUM AND 1.759 INCHES MAXIMUM IN
SURFACE TREATMENTCOPPER OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH8
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 3
F401A175Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
006643235-017Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
6643235 PIECE 17Reference 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 6643235-017?
6643235-017 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 6643235-017?
There are 3 known substitutes for 6643235-017: F401A175, 006643235-017, 6643235 PIECE 17. Substitute compatibility should be verified for your specific system.
What is the NSN for 6643235-017?
6643235-017 is cataloged in the U.S. Government catalog under NSN 5310-01-227-3365. 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.