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4R41A3 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.531 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN, overall_diameter: 0.750 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-262-3000, 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
4R41A3
NSN: 5310-00-262-3000
FSC: 5310
CAGE: 61510 — THERMO KING CORPORATION DBA PHOENIX GLOBAL DISTIRBUTION. (USA)
SPECIFICATIONS
materialCOPPER OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.531 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN
overall_diameter0.750 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-262-3000
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4R41A3 · 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
•
MATERIAL: COPPER OVERALL
•
THICKNESS: 0.062 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 0.531 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER OVERALL
THICKNESS0.062 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.531 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
1P7Interchangeable
interchangeable cross-reference
interchangeable
74042442Interchangeable
interchangeable cross-reference
interchangeable
55524Interchangeable
interchangeable cross-reference
interchangeable
8387941Interchangeable
interchangeable cross-reference
interchangeable
SM-B-187837Interchangeable
interchangeable cross-reference
interchangeable
55944Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4R41A3?
4R41A3 is a WASHER,FLAT.
What parts can replace 4R41A3?
There are 23 known substitutes for 4R41A3: 1P7, 74042442, 55524 and 20 more. Substitute compatibility should be verified for your specific system.
Is 4R41A3 still available?
4R41A3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026