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028261 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

028261: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 1.141 INCHES NOMINAL IN, outside_diameter: 1.688 INCHES NOMINAL IN, material_thickness: 0.057 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN, external_prebent_key_width: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, external_prebent_key_length: 0.265 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-970-5832, 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
028261
NSN: 5310-00-970-5832
FSC: 5310 — Nuts and Washers
CAGE: 77640 — ZF ACTIVE SAFETY AND ELECTRONICS US LLC DIV TRW COMMERCIAL STEERING SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter1.141 INCHES NOMINAL IN
outside_diameter1.688 INCHES NOMINAL IN
material_thickness0.057 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
external_key_quantity3
external_prebent_key_width0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
external_prebent_key_length0.265 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_inside_of_prebent_key0.734 INCHES NOMINAL IN
NSN5310-00-970-5832
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 028261 · 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: 0.734 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY LENGTH: 0.265 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.688 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.057 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 3
•
EXTERNAL PREBENT KEY WIDTH: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1010 OVERALL
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.734 INCHES NOMINAL IN
EXTERNAL PREBENT KEY LENGTH0.265 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.688 INCHES NOMINAL IN
MATERIAL THICKNESS0.057 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY3
EXTERNAL PREBENT KEY WIDTH0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1010 OVERALL
HOLE DIAMETER1.141 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
233257Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 028261?
028261 is a WASHER,KEY.
What parts can replace 028261?
There is 1 known substitute for 028261: 233257. Substitute compatibility should be verified for your specific system.
What is the NSN for 028261?
028261 is cataloged in the U.S. Government catalog under NSN 5310-00-970-5832. 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.