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540-3941-002 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

540-3941-002: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, hole_diameter: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN, shoulder_height: 0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN, outside_diameter: 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, style_designator: SHOULDERED, shoulder_diameter: 0.182 INCHES MINIMUM AND 0.186 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-558-6855, 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
540-3941-002
NSN: 5310-00-558-6855
FSC: 5310 — Nuts and Washers
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
hole_diameter0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
shoulder_height0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
outside_diameter0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter0.182 INCHES MINIMUM AND 0.186 INCHES MAXIMUM IN
surface_treatmentANODIZE OVERALL
material_thickness0.020 INCHES NOMINAL IN
material_document_and_classificationQQ-A-250/4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-558-6855
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 540-3941-002 · 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
•
SHOULDER HEIGHT: 0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.182 INCHES MINIMUM AND 0.186 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL: ALUMINUM ALLOY 2024 OVERALL
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
SHOULDER DIAMETER0.182 INCHES MINIMUM AND 0.186 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 2024 OVERALL
HOLE DIAMETER0.135 INCHES MINIMUM AND 0.145 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 540-3941-002?
540-3941-002 is a WASHER,SHOULDERED.
What is the NSN for 540-3941-002?
540-3941-002 is cataloged in the U.S. Government catalog under NSN 5310-00-558-6855. 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.