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1229G423 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1229G423: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.500 INCHES NOMINAL IN, outside_diameter: 0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, material_thickness: 0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-011-5551, 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
1229G423
NSN: 5310-00-011-5551
FSC: 5310 — Nuts and Washers
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
hole_diameter0.500 INCHES NOMINAL IN
outside_diameter0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
material_thickness0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
NSN5310-00-011-5551
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1229G423 · 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
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
OUTSIDE DIAMETER: 0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
MATERIAL THICKNESS0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
HOLE DIAMETER0.500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 7
1224Reference document
Same NSN cross-reference
Reference document — Secondary reference
115551Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FC2192Reference document
Same NSN cross-reference
Reference document — Secondary reference
786610Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
P76Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS35333-10Same 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 1229G423?
1229G423 is a WASHER,LOCK.
What parts can replace 1229G423?
There are 7 known substitutes for 1229G423: 1224, 115551, FC2192 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1229G423?
1229G423 is cataloged in the U.S. Government catalog under NSN 5310-00-011-5551. 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.