PartsTable
Technical Data Sheet
404-526 ✓ Verified by PartsTable
Legrand · 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 NUT,SELF-LOCKING,HEXAGON is a Legrand industrial component. Key specifications include end_item_identification: L21B SUPER PIPER CUB AIRCRAFT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-295-8806, 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
404-526
NSN: 5315-01-295-8806
FSC: 5315
CAGE: 63952 — EDERER INC STAR CRANES DIV (USA)
SPECIFICATIONS
end_item_identificationL21B SUPER PIPER CUB AIRCRAFT
NSN5315-01-295-8806
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 404-526 · Legrand ⚠ 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 HOLE DIAMETER: 0.344 INCHES NOMINAL IN
SECOND END STYLE: CHAMFERED AND COUNTERBORED
SECOND END TAPER ANGLE: 45.0 DEGREES NOMINAL
SURFACE FINISH: 63.0 MICROINCHES SHOULDER OUTSIDE DIAMETER
STYLE DESIGNATOR: UNDERCUT
THREAD LENGTH: 0.750 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL
TECHNICAL CHARACTERISTICS (FLIS)
FIRST HOLE DIAMETER0.344 INCHES NOMINAL IN
SECOND END STYLECHAMFERED AND COUNTERBORED
SECOND END TAPER ANGLE45.0 DEGREES NOMINAL
SPECIAL FEATURESDRILL 0.344 IN. NOMINAL DIAMETER 3.562 INCH NOMINAL DEPTH LONGITUDINAL HOLE IN SHOULDER END,ON AXIAL CENTER INTERSECTING 0.344 INCH NOMINAL DIAMETER PERPENDICULAR HOLE,TAP WITH 0.125 NATIONAL PIPE THREAD; TWO SYMMETRICAL GROOVES PARALLEL TO SHOULDER END 0.750 INCH FROM END,0.344 INCH NOMINAL WIDE BY 0.500 INCH NOMINAL DEEP; KEYWAY 0.312 INCH NOMINAL WIDE 0.156 IN.NOM DEPTH 1.188 INCHES NOMINAL LENGTH WITH A FULL RADIUS CORNER,ON LONGITUDINAL CENTERLINE IN SHANK; SHANK THREADED FOR TN 12 TIMKEN LOCKNUT IN
SURFACE FINISH63.0 MICROINCHES SHOULDER OUTSIDE DIAMETER
STYLE DESIGNATORUNDERCUT
THREAD LENGTH0.750 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
SHANK LENGTH0.750 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
406681Interchangeable
interchangeable cross-reference
interchangeable
404-526Interchangeable
interchangeable cross-reference
interchangeable
375-05-05 PART 40-45-26Interchangeable
Same NIIN cross-reference
interchangeable
375-05-05 ITEM 10Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 404-526?
404-526 is a NUT,SELF-LOCKING,HEXAGON manufactured by Legrand.
What parts can replace 404-526?
There are 4 known substitutes for 404-526: 406681, 404-526, 375-05-05 PART 40-45-26 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 404-526?
404-526 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-295-8806. This indicates validated use in U.S. government and defense supply chains.
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