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11579911 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11579911: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.630 INCHES NOMINAL IN, outside_diameter: 1.550 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.031 INCHES NOMINAL IN, end_item_identification: USED ON MORTAR 81MM,XM252 MM. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-439-9537, 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
11579911
NSN: 5310-01-439-9537
FSC: 5310 — Nuts and Washers
CAGE: 19206 — ARMY, UNITED STATES DEPARTMENT OF THE DBA WATERVLIET ARSENAL DIV BUSINESS DEVELOPMENT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.630 INCHES NOMINAL IN
outside_diameter1.550 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.031 INCHES NOMINAL IN
end_item_identificationUSED ON MORTAR 81MM,XM252 MM
external_prebent_key_width0.160 INCHES NOMINAL IN
distance_from_centerline_to_inside_of_prebent_key0.565 INCHES NOMINAL IN
NSN5310-01-439-9537
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11579911 · 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 INSIDE OF PREBENT KEY: 0.565 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 1.550 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.031 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY WIDTH: 0.160 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.630 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.565 INCHES NOMINAL IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER1.550 INCHES NOMINAL IN
MATERIAL THICKNESS0.031 INCHES NOMINAL IN
END ITEM IDENTIFICATIONUSED ON MORTAR 81MM,XM252 MM
EXTERNAL PREBENT KEY WIDTH0.160 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.630 INCHES NOMINAL 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: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 11579911?
11579911 is a WASHER,KEY.
What is the NSN for 11579911?
11579911 is cataloged in the U.S. Government catalog under NSN 5310-01-439-9537. 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.