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028258 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

028258: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 1.005 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN, outside_diameter: 1.350 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.0747 INCHES NOMINAL IN, internal_straight_key_width: 0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-989-5977, 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
028258
NSN: 5310-00-989-5977
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_diameter1.005 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN
outside_diameter1.350 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.0747 INCHES NOMINAL IN
internal_key_quantity1
internal_straight_key_width0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key0.400 INCHES NOMINAL IN
NSN5310-00-989-5977
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 028258 · 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
•
INTERNAL STRAIGHT KEY WIDTH: 0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.400 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.350 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.0747 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1010 OVERALL
•
INTERNAL KEY QUANTITY: 1
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.400 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.350 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN
MATERIAL THICKNESS0.0747 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
INTERNAL KEY QUANTITY1
HOLE DIAMETER1.005 INCHES MINIMUM AND 1.025 INCHES MAXIMUM 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 028258?
028258 is a WASHER,KEY.
What is the NSN for 028258?
028258 is cataloged in the U.S. Government catalog under NSN 5310-00-989-5977. This indicates validated use in U.S. government and defense supply chains.
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