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A3-021-0009 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A3-021-0009: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-01-643-2181, 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
A3-021-0009
NSN: 5310-01-643-2181
FSC: 5310 — Nuts and Washers
CAGE: 16062 — M.T. DAVIDSON COMPANY (USA)
SPECIFICATIONS
Part NumberA3-021-0009
NSN5310-01-643-2181
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A3-021-0009 · 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
SUBSTITUTES & CROSS-REFERENCES 2
D3-433-0010Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
D3-433-0010-9Reference 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 A3-021-0009?
A3-021-0009 is a WASHER,FLAT.
What parts can replace A3-021-0009?
There are 2 known substitutes for A3-021-0009: D3-433-0010, D3-433-0010-9. Substitute compatibility should be verified for your specific system.
What is the NSN for A3-021-0009?
A3-021-0009 is cataloged in the U.S. Government catalog under NSN 5310-01-643-2181. This indicates validated use in U.S. government and defense supply chains.
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