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2261921 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2261921: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.188 INCHES NOMINAL IN, outside_diameter: 0.378 INCHES NOMINAL IN, style_designator: FLAT INTERNAL TEETH, material_thickness: 0.022 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-003-4049, 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
2261921
NSN: 5310-00-003-4049
FSC: 5310 — Nuts and Washers
CAGE: 0B6S1 — INTERNATIONAL BUSINESS MACHINES CORP PARTS ORDER CENTER DEPT E - 54 (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.188 INCHES NOMINAL IN
outside_diameter0.378 INCHES NOMINAL IN
style_designatorFLAT INTERNAL TEETH
material_thickness0.022 INCHES NOMINAL IN
NSN5310-00-003-4049
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2261921 · 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: 0.378 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.022 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.378 INCHES NOMINAL IN
MATERIAL THICKNESS0.022 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.188 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-001-5340 5310-00-004-4584 5310-00-004-5157 5310-00-004-7045 5310-00-004-7046 5310-00-005-4375 5310-00-006-8067 5310-00-007-2907
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 2261921?
2261921 is a WASHER,LOCK.
What is the NSN for 2261921?
2261921 is cataloged in the U.S. Government catalog under NSN 5310-00-003-4049. 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.