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425-02261-21 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

425-02261-21: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, outside_diameter: 0.680 INCHES MAXIMUM IN, special_features: HARDENED, surface_treatment: ZINC OVERALL, material_thickness: 0.094 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: SPRING LOCK WASHER. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-681-2273, 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
425-02261-21
NSN: 5310-01-681-2273
FSC: 5310 — Nuts and Washers
CAGE: 32770 — KATO ENGINEERING INC. (USA)
SPECIFICATIONS
hole_diameter0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
outside_diameter0.680 INCHES MAXIMUM IN
special_featuresHARDENED
surface_treatmentZINC OVERALL
material_thickness0.094 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencySPRING LOCK WASHER
NSN5310-01-681-2273
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 425-02261-21 · 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
•
OUTSIDE DIAMETER: 0.680 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.094 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
HOLE DIAMETER: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.680 INCHES MAXIMUM IN
MATERIAL THICKNESS0.094 INCHES NOMINAL IN
SPECIAL FEATURESHARDENED
SURFACE TREATMENTZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSPRING LOCK WASHER
HOLE DIAMETER0.377 INCHES MINIMUM AND 0.385 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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 425-02261-21?
425-02261-21 is a WASHER,LOCK.
What is the NSN for 425-02261-21?
425-02261-21 is cataloged in the U.S. Government catalog under NSN 5310-01-681-2273. 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.