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1664829 ✓ 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: 2.118 INCHES NOMINAL IN, outside_diameter: 2.750 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.250 INCHES NOMINAL IN, internal_key_quantity: 10. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-950-0480, 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
1664829
NSN: 5310-00-950-0480
FSC: 5310
CAGE: 12204 — CHRYSLER REALTY COMPANY LLC DBA DAIMLER CHRYSLER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter2.118 INCHES NOMINAL IN
outside_diameter2.750 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.250 INCHES NOMINAL IN
internal_key_quantity10
internal_straight_key_width0.335 INCHES NOMINAL IN
distance_from_centerline_to_top_of_internal_key0.987 INCHES NOMINAL IN
NSN5310-00-950-0480
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1664829 · 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
•
MATERIAL THICKNESS: 0.250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: KEY
•
INTERNAL KEY QUANTITY: 10
•
INTERNAL STRAIGHT KEY WIDTH: 0.335 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.987 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.750 INCHES NOMINAL IN
•
HOLE DIAMETER: 2.118 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.250 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORKEY
INTERNAL KEY QUANTITY10
INTERNAL STRAIGHT KEY WIDTH0.335 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.987 INCHES NOMINAL IN
OUTSIDE DIAMETER2.750 INCHES NOMINAL IN
HOLE DIAMETER2.118 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
S14Interchangeable
interchangeable cross-reference
interchangeable
A9783Interchangeable
interchangeable cross-reference
interchangeable
42-65AInterchangeable
interchangeable cross-reference
interchangeable
306KDGInterchangeable
interchangeable cross-reference
interchangeable
47606Interchangeable
interchangeable cross-reference
interchangeable
43306GPInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1664829?
1664829 is a WASHER,KEY.
What parts can replace 1664829?
There are 10 known substitutes for 1664829: S14, A9783, 42-65A and 7 more. Substitute compatibility should be verified for your specific system.
Is 1664829 still available?
1664829 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