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H623-0503-45 — NUT,SLEEVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

H623-0503-45: NUT,SLEEVE.

The NUT,SLEEVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 OVERALL, nut_style: SLEEVE, nut_length: 2.000 INCHES NOMINAL IN, nut_diameter: 5.500 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-491-9280, 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
H623-0503-45
NSN: 5310-01-491-9280
FSC: 5310 — Nuts and Washers
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 OVERALL
nut_styleSLEEVE
nut_length2.000 INCHES NOMINAL IN
nut_diameter5.500 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
flange_thickness0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_size2.000 INCHES IN
cross-sectional_shapeROUND OVERALL
end_item_identificationLOS ANGELES CLASS SSN (688), ROD ASSY CONN
thread_quantity_per_inch12
NSN5310-01-491-9280
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: H623-0503-45 · 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
•
FLANGE WIDTH ACROSS FLATS: 3.500 INCHES NOMINAL IN
•
NUT LENGTH: 2.000 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.500 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.000 INCHES IN
•
NUT DIAMETER: 5.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE WIDTH ACROSS FLATS3.500 INCHES NOMINAL IN
NUT LENGTH2.000 INCHES NOMINAL IN
FLANGE THICKNESS0.500 INCHES NOMINAL IN
THREAD SERIESUN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.000 INCHES IN
NUT DIAMETER5.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPEROUND OVERALL
NUT STYLESLEEVE
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

No substitute or cross-reference records for this part.

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 H623-0503-45?
H623-0503-45 is a NUT,SLEEVE.
What is the NSN for H623-0503-45?
H623-0503-45 is cataloged in the U.S. Government catalog under NSN 5310-01-491-9280. 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.