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K9475242AF PIECE 4 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

K9475242AF PIECE 4: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 0.531 INCHES NOMINAL IN, outside_diameter: 0.812 INCHES NOMINAL IN, material_thickness: 0.062 INCHES NOMINAL IN, external_straight_key_width: 0.188 INCHES NOMINAL IN, external_straight_key_length: 0.375 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: NAVY SPECIAL PROJECT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-371-8420, 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
K9475242AF PIECE 4
NSN: 5310-01-371-8420
FSC: 5310 — Nuts and Washers
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
hole_diameter0.531 INCHES NOMINAL IN
outside_diameter0.812 INCHES NOMINAL IN
material_thickness0.062 INCHES NOMINAL IN
external_key_quantity3
external_straight_key_width0.188 INCHES NOMINAL IN
external_straight_key_length0.375 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-01-371-8420
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K9475242AF PIECE 4 · 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
•
EXTERNAL STRAIGHT KEY LENGTH: 0.375 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.812 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.188 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 3
•
HOLE DIAMETER: 0.531 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL STRAIGHT KEY LENGTH0.375 INCHES NOMINAL IN
OUTSIDE DIAMETER0.812 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
EXTERNAL STRAIGHT KEY WIDTH0.188 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY3
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
HOLE DIAMETER0.531 INCHES NOMINAL 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 K9475242AF PIECE 4?
K9475242AF PIECE 4 is a WASHER,KEY.
What is the NSN for K9475242AF PIECE 4?
K9475242AF PIECE 4 is cataloged in the U.S. Government catalog under NSN 5310-01-371-8420. 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.