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2909259 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2909259: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 2.031 INCHES NOMINAL IN, outside_diameter: 2.562 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.079 INCHES NOMINAL IN, external_key_quantity: 11. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-478-6728, 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
2909259
NSN: 5310-00-478-6728
FSC: 5310 — Nuts and Washers
CAGE: 86403 — CHRYSLER CORP SERVICE AND PARTS OPNS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter2.031 INCHES NOMINAL IN
outside_diameter2.562 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.079 INCHES NOMINAL IN
external_key_quantity11
internal_key_quantity1
end_item_identificationW/S: AIRCRAFT, T-39; TRACTOR, FLIGHTLINE TOWING
external_straight_key_width0.375 INCHES NOMINAL IN
internal_straight_key_width0.250 INCHES NOMINAL IN
overall_distance_including_keys3.031 INCHES NOMINAL IN
distance_from_centerline_to_top_of_internal_key0.890 INCHES NOMINAL IN
NSN5310-00-478-6728
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2909259 · 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
•
INTERNAL STRAIGHT KEY WIDTH: 0.250 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.890 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 3.031 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 2.562 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.079 INCHES NOMINAL IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.375 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 11
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.250 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.890 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS3.031 INCHES NOMINAL IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER2.562 INCHES NOMINAL IN
MATERIAL THICKNESS0.079 INCHES NOMINAL IN
EXTERNAL STRAIGHT KEY WIDTH0.375 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY11
END ITEM IDENTIFICATIONW/S: AIRCRAFT, T-39; TRACTOR, FLIGHTLINE TOWING
MATERIALSTEEL OVERALL
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 2909259?
2909259 is a WASHER,KEY.
What is the NSN for 2909259?
2909259 is cataloged in the U.S. Government catalog under NSN 5310-00-478-6728. 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.