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Technical Data Sheet
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Y030 139 03 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

Y030 139 03: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-01-308-2643, 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
Y030 139 03
NSN: 5310-01-308-2643
FSC: 5310 — Nuts and Washers
CAGE: U0747 — PACCAR PARTS U.K. LIMITED (GBR)
SPECIFICATIONS
Part NumberY030 139 03
NSN5310-01-308-2643
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: Y030 139 03 · 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
ABU7091Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
WA-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is Y030 139 03?
Y030 139 03 is a WASHER,FLAT.
What parts can replace Y030 139 03?
There are 2 known substitutes for Y030 139 03: ABU7091, WA-18. Substitute compatibility should be verified for your specific system.
What is the NSN for Y030 139 03?
Y030 139 03 is cataloged in the U.S. Government catalog under NSN 5310-01-308-2643. This indicates validated use in U.S. government and defense supply chains.
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