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1755561 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1755561: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include width: 0.500 INCHES NOMINAL IN, length: 0.500 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, attachment_method: HOLE, surface_treatment: PAINT OVERALL, mounting_hole_diameter: 0.070 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-297-2540, 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
1755561
NSN: 5310-00-297-2540
NIINs: 002972540, 004900989
FSC: 5310 — Nuts and Washers
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
width0.500 INCHES NOMINAL IN
length0.500 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
attachment_methodHOLE
surface_treatmentPAINT OVERALL
mounting_hole_diameter0.070 INCHES NOMINAL IN
mounting_hole_quantity2
center_to_center_distance_between_mounting_holes0.375 INCHES NOMINAL IN
NSN5310-00-297-2540
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1755561 · 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: 0.675 INCHES MINIMUM AND 0.691 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
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TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.532 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE NUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.675 INCHES MINIMUM AND 0.691 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.532 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE NUT
THREAD CLASS3B
THREAD QUANTITY PER INCH16
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1755561?
1755561 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 1755561?
1755561 is cataloged in the U.S. Government catalog under NSN 5310-00-297-2540. 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.