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11509227 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11509227: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include hole_diameter: 16.0 MILLIMETERS NOMINAL MM, part_name_assigned_by_controlling_agency: WASHER. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-645-4391, 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
11509227
NSN: 5310-01-645-4391
FSC: 5310 — Nuts and Washers
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
hole_diameter16.0 MILLIMETERS NOMINAL MM
part_name_assigned_by_controlling_agencyWASHER
NSN5310-01-645-4391
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11509227 · 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
•
HOLE DIAMETER: 16.0 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER
HOLE DIAMETER16.0 MILLIMETERS NOMINAL MM
SUBSTITUTES & CROSS-REFERENCES 2
12590276Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
12590276 ITEM 5Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11509227?
11509227 is a WASHER,FLAT.
What parts can replace 11509227?
There are 2 known substitutes for 11509227: 12590276, 12590276 ITEM 5. Substitute compatibility should be verified for your specific system.
What is the NSN for 11509227?
11509227 is cataloged in the U.S. Government catalog under NSN 5310-01-645-4391. 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.