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209419-4 — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

209419-4: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 1100 OVERALL, hole_diameter: 0.439 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN, heat_treatment: F-AS FABRICATED, outside_diameter: 1.110 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN, material_thickness: 0.0067 INCHES MINIMUM AND 0.0073 INCHES MAXIMUM IN, internal_keyway_width: 0.064 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-124-9785, 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
209419-4
NSN: 5310-00-124-9785
FSC: 5310 — Nuts and Washers
CAGE: 59875 — EATON CORP DBA EATON AEROSPACE JACKSON (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 1100 OVERALL
hole_diameter0.439 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN
heat_treatmentF-AS FABRICATED
outside_diameter1.110 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN
material_thickness0.0067 INCHES MINIMUM AND 0.0073 INCHES MAXIMUM IN
internal_keyway_width0.064 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
internal_keyway_quantity1
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
distance_from_centerline_to_bottom_of_internal_keyway0.043 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
NSN5310-00-124-9785
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 209419-4 · 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: 0.043 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
•
INTERNAL KEYWAY WIDTH: 0.064 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
•
HEAT TREATMENT: F-AS FABRICATED
•
OUTSIDE DIAMETER: 1.110 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN
•
INTERNAL KEYWAY QUANTITY: 1
•
MATERIAL THICKNESS: 0.0067 INCHES MINIMUM AND 0.0073 INCHES MAXIMUM IN
•
MATERIAL: ALUMINUM ALLOY 1100 OVERALL
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO BOTTOM OF INTERNAL KEYWAY0.043 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
INTERNAL KEYWAY WIDTH0.064 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
HEAT TREATMENTF-AS FABRICATED
OUTSIDE DIAMETER1.110 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN
INTERNAL KEYWAY QUANTITY1
MATERIAL THICKNESS0.0067 INCHES MINIMUM AND 0.0073 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIALALUMINUM ALLOY 1100 OVERALL
HOLE DIAMETER0.439 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN
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 209419-4?
209419-4 is a WASHER,KEYWAY.
What is the NSN for 209419-4?
209419-4 is cataloged in the U.S. Government catalog under NSN 5310-00-124-9785. 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.