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P21477 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

P21477: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.495 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, outside_diameter: 0.776 INCHES MINIMUM AND 0.801 INCHES MAXIMUM IN, style_designator: COUNTERSINK EXTERNAL TEETH, countersink_angle: 82.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM, material_thickness: 0.025 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-336-6862, 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
P21477
NSN: 5310-01-336-6862
FSC: 5310 — Nuts and Washers
CAGE: 1YHH8 — JLG INDUSTRIES, INC. (USA)
SPECIFICATIONS
hole_diameter0.495 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
outside_diameter0.776 INCHES MINIMUM AND 0.801 INCHES MAXIMUM IN
style_designatorCOUNTERSINK EXTERNAL TEETH
countersink_angle82.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM
material_thickness0.025 INCHES NOMINAL IN
NSN5310-01-336-6862
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: P21477 · 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: COUNTERSINK EXTERNAL TEETH
•
OUTSIDE DIAMETER: 0.776 INCHES MINIMUM AND 0.801 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.025 INCHES NOMINAL IN
•
COUNTERSINK ANGLE: 82.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM
•
HOLE DIAMETER: 0.495 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORCOUNTERSINK EXTERNAL TEETH
OUTSIDE DIAMETER0.776 INCHES MINIMUM AND 0.801 INCHES MAXIMUM IN
MATERIAL THICKNESS0.025 INCHES NOMINAL IN
COUNTERSINK ANGLE82.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM
HOLE DIAMETER0.495 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
1524-04Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 P21477?
P21477 is a WASHER,LOCK.
What parts can replace P21477?
There is 1 known substitute for P21477: 1524-04. Substitute compatibility should be verified for your specific system.
What is the NSN for P21477?
P21477 is cataloged in the U.S. Government catalog under NSN 5310-01-336-6862. 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.