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A1804-2 — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A1804-2: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, outside_diameter: 0.594 INCHES NOMINAL IN, material_thickness: 0.005 INCHES NOMINAL IN, internal_keyway_width: 0.064 INCHES NOMINAL IN, material_document_and_classification: MIL-S-5059,COMP 301,1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-010-8209, 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
A1804-2
NSN: 5310-00-010-8209
FSC: 5310 — Nuts and Washers
CAGE: 98889 — AEROCONTROLEX GROUP, INC. DIV TALLEY ACTUATORS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
outside_diameter0.594 INCHES NOMINAL IN
material_thickness0.005 INCHES NOMINAL IN
internal_keyway_width0.064 INCHES NOMINAL IN
internal_keyway_quantity1
material_document_and_classificationMIL-S-5059,COMP 301,1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE OVERALL
distance_from_centerline_to_bottom_of_internal_keyway0.288 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
NSN5310-00-010-8209
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A1804-2 · 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
•
DISTANCE FROM CENTERLINE TO BOTTOM OF INTERNAL KEYWAY: 0.288 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
•
INTERNAL KEYWAY WIDTH: 0.064 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059,COMP 301,1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.594 INCHES NOMINAL IN
•
INTERNAL KEYWAY QUANTITY: 1
•
MATERIAL THICKNESS: 0.005 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO BOTTOM OF INTERNAL KEYWAY0.288 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
INTERNAL KEYWAY WIDTH0.064 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059,COMP 301,1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.594 INCHES NOMINAL IN
INTERNAL KEYWAY QUANTITY1
MATERIAL THICKNESS0.005 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A1804-2?
A1804-2 is a WASHER,KEYWAY.
What is the NSN for A1804-2?
A1804-2 is cataloged in the U.S. Government catalog under NSN 5310-00-010-8209. This indicates validated use in U.S. government and defense supply chains.
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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.