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2578624-001A — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2578624-001A: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 1.255 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN, recess_diameter: 1.615 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN, outside_diameter: 1.960 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-497-7329, 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
2578624-001A
NSN: 5310-00-497-7329
FSC: 5310 — Nuts and Washers
CAGE: 6K4C8 — GOODRICH CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter1.255 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN
recess_diameter1.615 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN
outside_diameter1.960 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.258 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
material_document_and_classificationAMS 4640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-497-7329
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2578624-001A · 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 4640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.960 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.258 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
•
RECESS DIAMETER: 1.615 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN
•
TEST DATA DOCUMENT: 81349-MIL-I-6866 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
HOLE DIAMETER: 1.255 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.960 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
MATERIAL THICKNESS0.258 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
RECESS DIAMETER1.615 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN
TEST DATA DOCUMENT81349-MIL-I-6866 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MATERIALALUMINUM ALLOY OVERALL
HOLE DIAMETER1.255 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN
RECESS ANGLE90.0 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
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2578624-001A?
2578624-001A is a WASHER,RECESSED.
What is the NSN for 2578624-001A?
2578624-001A is cataloged in the U.S. Government catalog under NSN 5310-00-497-7329. 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.