PartsTable
Technical Data Sheet
04-20390 ✓ 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: RUBBER SILICONE CLASS Q SEALING ELEMENT, overall_height: 2.7 MILLIMETERS MINIMUM AND 3.1 MILLIMETERS MAXIMUM MM, outside_diameter: 16.5 MILLIMETERS MINIMUM AND 17.2 MILLIMETERS MAXIMUM MM, end_item_identification: 6115-01-561-7455 GENERATOR SET, DIESEL ENGINE, internal_straight_key_width: 2.0 MILLIMETERS NOMINAL MM, material_document_and_classification: ZZ-R-765, CLASS 3 ASSN STD SINGLE MATERIAL RESPONSE BODY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-593-5320, 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
04-20390
NSN: 5310-01-593-5320
FSC: 5310
CAGE: 30554 — DEPARTMENT OF DEFENSE PROJECT MANAGER-MOBILE ELECTRIC POWER (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q SEALING ELEMENT
overall_height2.7 MILLIMETERS MINIMUM AND 3.1 MILLIMETERS MAXIMUM MM
outside_diameter16.5 MILLIMETERS MINIMUM AND 17.2 MILLIMETERS MAXIMUM MM
internal_key_quantity1
end_item_identification6115-01-561-7455 GENERATOR SET, DIESEL ENGINE
internal_straight_key_width2.0 MILLIMETERS NOMINAL MM
material_document_and_classificationZZ-R-765, CLASS 3 ASSN STD SINGLE MATERIAL RESPONSE BODY
part_name_assigned_by_controlling_agencyRING, SEALING
NSN5310-01-593-5320
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 04-20390 · 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: RUBBER SILICONE CLASS Q SEALING ELEMENT
OUTSIDE DIAMETER: 16.5 MILLIMETERS MINIMUM AND 17.2 MILLIMETERS MAXIMUM MM
INTERNAL KEY QUANTITY: 1
INTERNAL STRAIGHT KEY WIDTH: 2.0 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SILICONE CLASS Q SEALING ELEMENT
OUTSIDE DIAMETER16.5 MILLIMETERS MINIMUM AND 17.2 MILLIMETERS MAXIMUM MM
INTERNAL KEY QUANTITY1
MATERIALSTEEL CORROSION RESISTING BODY
INTERNAL STRAIGHT KEY WIDTH2.0 MILLIMETERS NOMINAL MM
PART NAME ASSIGNED BY CONTROLLING AGENCYRING, SEALING
END ITEM IDENTIFICATION6115-01-561-7455 GENERATOR SET, DIESEL ENGINE
OVERALL HEIGHT2.7 MILLIMETERS MINIMUM AND 3.1 MILLIMETERS MAXIMUM MM
MATERIAL DOCUMENT AND CLASSIFICATIONZZ-R-765, CLASS 3 ASSN STD SINGLE MATERIAL RESPONSE BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
7637488P2Interchangeable
interchangeable cross-reference
interchangeable
C6511-4Interchangeable
interchangeable cross-reference
interchangeable
XA602-25Interchangeable
interchangeable cross-reference
interchangeable
60-225 PIECE 225A1Interchangeable
interchangeable cross-reference
interchangeable
3298995Interchangeable
interchangeable cross-reference
interchangeable
225A1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 04-20390?
04-20390 is a WASHER,KEY.
What parts can replace 04-20390?
There are 9 known substitutes for 04-20390: 7637488P2, C6511-4, XA602-25 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 04-20390?
04-20390 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-593-5320. This indicates validated use in U.S. government and defense supply chains.
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