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342-6404609 FIND 12 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

342-6404609 FIND 12: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 OVERALL, hole_diameter: 1.558 INCHES MINIMUM AND 1.574 INCHES MAXIMUM IN, special_features: INSIDE DIA. HAS TWO HOLES, style_designator: FLAT EXTERNAL TEETH, material_thickness: 0.062 INCHES NOMINAL IN, material_document_and_classification: QQ-N-281, CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL.

This part is cataloged in the U.S. Government catalog under NSN 5310-01-431-5593, 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
342-6404609 FIND 12
NSN: 5310-01-431-5593
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 OVERALL
hole_diameter1.558 INCHES MINIMUM AND 1.574 INCHES MAXIMUM IN
special_featuresINSIDE DIA. HAS TWO HOLES
style_designatorFLAT EXTERNAL TEETH
material_thickness0.062 INCHES NOMINAL IN
material_document_and_classificationQQ-N-281, CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-431-5593
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 342-6404609 FIND 12 · 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 EXTERNAL TEETH
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281, CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY 400 OVERALL
•
HOLE DIAMETER: 1.558 INCHES MINIMUM AND 1.574 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT EXTERNAL TEETH
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281, CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
SPECIAL FEATURESINSIDE DIA. HAS TWO HOLES
MATERIALNICKEL ALLOY 400 OVERALL
HOLE DIAMETER1.558 INCHES MINIMUM AND 1.574 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 342-6404609 FIND 12?
342-6404609 FIND 12 is a WASHER,LOCK.
What is the NSN for 342-6404609 FIND 12?
342-6404609 FIND 12 is cataloged in the U.S. Government catalog under NSN 5310-01-431-5593. 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.