PartsTable
Technical Data Sheet
Download PDF

2678146 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2678146: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 3003 OVERALL, recess_angle: 100.0 DEGREES NOMINAL, hole_diameter: 0.529 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN, heat_treatment: O-ANNEALED, RECRYSTALLIZED, recess_diameter: 0.602 INCHES MAXIMUM IN, outside_diameter: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-052-1289, 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
2678146
NSN: 5310-00-052-1289
FSC: 5310 — Nuts and Washers
CAGE: 88277 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 3003 OVERALL
recess_angle100.0 DEGREES NOMINAL
hole_diameter0.529 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
heat_treatmentO-ANNEALED, RECRYSTALLIZED
recess_diameter0.602 INCHES MAXIMUM IN
outside_diameter1.000 INCHES NOMINAL IN
style_designatorRECESSED
surface_treatmentANODIZE OVERALL
material_thickness0.090 INCHES NOMINAL IN
material_document_and_classificationQQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-052-1289
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2678146 · 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
•
HEAT TREATMENT: O-ANNEALED, RECRYSTALLIZED
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.000 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.090 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.602 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL: ALUMINUM ALLOY 3003 OVERALL
TECHNICAL CHARACTERISTICS
HEAT TREATMENTO-ANNEALED, RECRYSTALLIZED
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.000 INCHES NOMINAL IN
MATERIAL THICKNESS0.090 INCHES NOMINAL IN
RECESS DIAMETER0.602 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 3003 OVERALL
HOLE DIAMETER0.529 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
RECESS ANGLE100.0 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: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 2678146?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 2678146?
2678146 is a WASHER,RECESSED.
What is the NSN for 2678146?
2678146 is cataloged in the U.S. Government catalog under NSN 5310-00-052-1289. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 2678146

✓ 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.