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A41781 ✓ 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 GUIDE,VALVE STEM is a the manufacturer industrial component. Key specifications include material: STEEL, bore_diameter: 0.4060 INCHES NOMINAL IN, overall_length: 3.219 INCHES NOMINAL IN, bore_counterbore: NOT INCLUDED, bore_countersink: NOT INCLUDED, outside_diameter: 0.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-292-7828, 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
A41781
NSN: 5315-00-292-7828
FSC: 5315
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialSTEEL
bore_diameter0.4060 INCHES NOMINAL IN
overall_length3.219 INCHES NOMINAL IN
bore_counterboreNOT INCLUDED
bore_countersinkNOT INCLUDED
outside_diameter0.750 INCHES NOMINAL IN
style_designatorPLAIN, SHOULDERED
aa_end_chamfer_length0.125 INCHES NOMINAL IN
bb_end_chamfer_length0.031 INCHES NOMINAL IN
major_diameter_length2.344 INCHES NOMINAL IN
aa_end_chamfer_angle_in_deg30.0
bb_end_chamfer_angle_in_deg30.0
NSN5315-00-292-7828
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A41781 · 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
•
FIRST END STYLE: RADIUS
•
MATERIAL: COPPER ALLOY 360 OVERALL
•
FIRST END CORNER RADIUS: 0.100 INCHES NOMINAL IN
•
PIN OVERALL DIAMETER: 0.3130 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 0.219 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 4610 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SECOND END STYLE: SQUARE
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END STYLERADIUS
MATERIALCOPPER ALLOY 360 OVERALL
FIRST END CORNER RADIUS0.100 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.3130 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
PIN OVERALL LENGTH0.219 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4610 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SECOND END STYLESQUARE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
A41781Interchangeable
interchangeable cross-reference
interchangeable
41782Interchangeable
interchangeable cross-reference
interchangeable
41781Interchangeable
interchangeable cross-reference
interchangeable
41629Interchangeable
interchangeable cross-reference
interchangeable
LA123-41780 ITEM 1Interchangeable
interchangeable cross-reference
interchangeable
LA123-41780Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A41781?
A41781 is a GUIDE,VALVE STEM.
What parts can replace A41781?
There are 7 known substitutes for A41781: A41781, 41782, 41781 and 4 more. Substitute compatibility should be verified for your specific system.
Is A41781 still available?
A41781 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