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254518 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

254518: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: NICKEL OVERALL, recess_angle: 60.0 DEGREES NOMINAL, recess_depth: 0.045 INCHES NOMINAL IN, hole_diameter: 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, overall_height: 0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN, recess_diameter: 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-558-9500, 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
254518
NSN: 5310-00-558-9500
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialNICKEL OVERALL
recess_angle60.0 DEGREES NOMINAL
recess_depth0.045 INCHES NOMINAL IN
hole_diameter0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
overall_height0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
recess_diameter0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
outside_diameter0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.090 INCHES NOMINAL IN
material_document_and_classificationAMS 5665 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-558-9500
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 254518 · 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
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5665 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.045 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.090 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
•
MATERIAL: NICKEL OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5665 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN
RECESS DEPTH0.045 INCHES NOMINAL IN
MATERIAL THICKNESS0.090 INCHES NOMINAL IN
RECESS DIAMETER0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
MATERIALNICKEL OVERALL
HOLE DIAMETER0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
RECESS ANGLE60.0 DEGREES NOMINAL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 254518?
254518 is a WASHER,RECESSED.
What is the NSN for 254518?
254518 is cataloged in the U.S. Government catalog under NSN 5310-00-558-9500. 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.