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Technical Data Sheet
PartsTable / COMPONENT / 901-0559
901-0559 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 1.583 INCHES MINIMUM AND 1.603 INCHES MAXIMUM IN, outside_diameter: 2.750 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN, internal_straight_key_width: 0.290 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-882-8320, 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
901-0559
NSN: 5310-00-882-8320
FSC: 5310
CAGE: 93568 — HARSCO CORP BMY-COMBAT SYSTEMS DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.583 INCHES MINIMUM AND 1.603 INCHES MAXIMUM IN
outside_diameter2.750 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
internal_key_quantity1
internal_straight_key_width0.290 INCHES NOMINAL IN
distance_from_centerline_to_top_of_internal_key0.669 INCHES MINIMUM AND 0.684 INCHES MAXIMUM IN
NSN5310-00-882-8320
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 901-0559 · 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: 0.290 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL: STEEL OVERALL
•
OUTSIDE DIAMETER: 2.750 INCHES NOMINAL IN
•
INTERNAL KEY QUANTITY: 1
•
MATERIAL THICKNESS: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
•
HOLE DIAMETER: 1.583 INCHES MINIMUM AND 1.603 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.669 INCHES MINIMUM AND 0.684 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL STRAIGHT KEY WIDTH0.290 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIALSTEEL OVERALL
OUTSIDE DIAMETER2.750 INCHES NOMINAL IN
INTERNAL KEY QUANTITY1
MATERIAL THICKNESS0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
HOLE DIAMETER1.583 INCHES MINIMUM AND 1.603 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.669 INCHES MINIMUM AND 0.684 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
SMP1-14Interchangeable
interchangeable cross-reference
interchangeable
1805B340Interchangeable
interchangeable cross-reference
interchangeable
3712-5Interchangeable
interchangeable cross-reference
interchangeable
20047Interchangeable
interchangeable cross-reference
interchangeable
110 47/64Interchangeable
interchangeable cross-reference
interchangeable
53147Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 901-0559?
901-0559 is a WASHER,KEY.
What parts can replace 901-0559?
There are 16 known substitutes for 901-0559: SMP1-14, 1805B340, 3712-5 and 13 more. Substitute compatibility should be verified for your specific system.
Is 901-0559 still available?
901-0559 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026