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4W028 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4W028: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 1.281 INCHES NOMINAL IN, outside_diameter: 2.280 INCHES NOMINAL IN, material_thickness: 0.062 INCHES NOMINAL IN, external_prebent_key_angle: 90.0 DEGREES NOMINAL, internal_prebent_key_width: 0.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-350-3046, 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
4W028
NSN: 5310-00-350-3046
FSC: 5310 — Nuts and Washers
CAGE: 62265 — VOLVO TRUCKS NORTH AMERICA, INC. DBA (FOREIGN PARENT IS VOLVO LASTVAGNAR AB, GOTEBORG, SWEDEN.) (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter1.281 INCHES NOMINAL IN
outside_diameter2.280 INCHES NOMINAL IN
material_thickness0.062 INCHES NOMINAL IN
internal_key_quantity2
external_prebent_key_angle90.0 DEGREES NOMINAL
internal_prebent_key_width0.375 INCHES NOMINAL IN
internal_prebent_key_length0.094 INCHES NOMINAL IN
overall_distance_including_keys2.280 INCHES NOMINAL IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_inside_of_prebent_key0.703 INCHES NOMINAL IN
NSN5310-00-350-3046
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4W028 · 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
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.703 INCHES NOMINAL IN
•
INTERNAL PREBENT KEY WIDTH: 0.375 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 2.280 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 2.280 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY ANGLE: 90.0 DEGREES NOMINAL
•
INTERNAL PREBENT KEY LENGTH: 0.094 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.703 INCHES NOMINAL IN
INTERNAL PREBENT KEY WIDTH0.375 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS2.280 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER2.280 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
EXTERNAL PREBENT KEY ANGLE90.0 DEGREES NOMINAL
INTERNAL PREBENT KEY LENGTH0.094 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
INTERNAL KEY QUANTITY2
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 2
SP348WReference document
Same NSN cross-reference
Reference document — Secondary reference
382375Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4W028?
4W028 is a WASHER,KEY.
What parts can replace 4W028?
There are 2 known substitutes for 4W028: SP348W, 382375. Substitute compatibility should be verified for your specific system.
What is the NSN for 4W028?
4W028 is cataloged in the U.S. Government catalog under NSN 5310-00-350-3046. 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.