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1222-01-00 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1222-01-00: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.472 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN, outside_diameter: 0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, features_provided: CASEHARDENED, surface_treatment: NICKEL OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-198-3738, 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
1222-01-00
NSN: 5310-00-198-3738
FSC: 5310 — Nuts and Washers
CAGE: 78189 — ITW SHAKEPROOF AUTOMOTIVE PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.472 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN
outside_diameter0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
features_providedCASEHARDENED
surface_treatmentNICKEL OVERALL
material_thickness0.018 INCHES NOMINAL IN
NSN5310-00-198-3738
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1222-01-00 · 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: 0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
•
FEATURES PROVIDED: CASEHARDENED
•
MATERIAL THICKNESS: 0.018 INCHES NOMINAL IN
•
SURFACE TREATMENT: NICKEL OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.472 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
FEATURES PROVIDEDCASEHARDENED
MATERIAL THICKNESS0.018 INCHES NOMINAL IN
SURFACE TREATMENTNICKEL OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.472 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
1222-01Reference document
Same NSN cross-reference
Reference document — Secondary reference
70128Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1222-01-00?
1222-01-00 is a WASHER,LOCK.
What parts can replace 1222-01-00?
There are 2 known substitutes for 1222-01-00: 1222-01, 70128. Substitute compatibility should be verified for your specific system.
What is the NSN for 1222-01-00?
1222-01-00 is cataloged in the U.S. Government catalog under NSN 5310-00-198-3738. 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.