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12X201 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12X201: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1060 OR STEEL COMP 1080 OVERALL, hole_diameter: 0.382 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN, outside_diameter: 0.678 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: TIN OVERALL, material_thickness: 0.070 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-043-2646, 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
12X201
NSN: 5310-00-043-2646
FSC: 5310 — Nuts and Washers
CAGE: 68505 — PRESTOLITE ELECTRIC INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1060 OR STEEL COMP 1080 OVERALL
hole_diameter0.382 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN
outside_diameter0.678 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentTIN OVERALL
material_thickness0.070 INCHES NOMINAL IN
nondefinitive_spec/std_dataA CLASS AND 1 STYLE
material_document_and_classificationASTM A576 ASSN STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-043-2646
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12X201 · 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: SPLIT HELICAL-RIGHT HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A576 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.678 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.070 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: A CLASS AND 1 STYLE
•
SURFACE TREATMENT: TIN OVERALL
•
MATERIAL: STEEL COMP 1060 OR STEEL COMP 1080 OVERALL
•
HOLE DIAMETER: 0.382 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A576 ASSN STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.678 INCHES MAXIMUM IN
MATERIAL THICKNESS0.070 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATAA CLASS AND 1 STYLE
SURFACE TREATMENTTIN OVERALL
MATERIALSTEEL COMP 1060 OR STEEL COMP 1080 OVERALL
HOLE DIAMETER0.382 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 4
432646Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
FFW84CLASSASTYLE1Reference document
Same NSN cross-reference
Reference document — Identification reference
5310PL0720370Reference document
Same NSN cross-reference
Reference document — Informative reference only
5310000432646Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12X201?
12X201 is a WASHER,LOCK.
What parts can replace 12X201?
There are 4 known substitutes for 12X201: 432646, FFW84CLASSASTYLE1, 5310PL0720370 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12X201?
12X201 is cataloged in the U.S. Government catalog under NSN 5310-00-043-2646. 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.