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PartsTable / COMPONENT / 28903-5A
28903-5A ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RING,LOCK,KEYED is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, key_width: 0.076 INCHES MAXIMUM IN, key_length: 0.156 INCHES MAXIMUM IN, overall_height: 0.203 INCHES NOMINAL IN, inside_diameter: 0.375 INCHES MINIMUM IN, special_features: A SERIES, THIN WALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5365-00-812-1756, 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
28903-5A
NSN: 5365-00-812-1756
FSC: 5365
CAGE: 11599 — TRIUMPH ENGINE CONTROL SYSTEMS LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
key_width0.076 INCHES MAXIMUM IN
key_length0.156 INCHES MAXIMUM IN
overall_height0.203 INCHES NOMINAL IN
inside_diameter0.375 INCHES MINIMUM IN
special_featuresA SERIES, THIN WALL
surface_treatmentPASSIVATE
overall_outside_diameter0.432 INCHES MAXIMUM IN
NSN5365-00-812-1756
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,LOCK,KEYED TITLE COMPONENT PN 28903-5A MFR RING,LOCK,KEYED
KEY FEATURES
•
MATERIAL: STEEL CORROSION RESISTING
•
SURFACE TREATMENT: PASSIVATE
•
KEY WIDTH: 0.076 INCHES MAXIMUM IN
•
OVERALL OUTSIDE DIAMETER: 0.432 INCHES MAXIMUM IN
•
KEY LENGTH: 0.156 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.375 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESA SERIES, THIN WALL
MATERIALSTEEL CORROSION RESISTING
SURFACE TREATMENTPASSIVATE
KEY WIDTH0.076 INCHES MAXIMUM IN
OVERALL HEIGHT0.203 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER0.432 INCHES MAXIMUM IN
KEY LENGTH0.156 INCHES MAXIMUM IN
INSIDE DIAMETER0.375 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
7027Interchangeable
interchangeable cross-reference
interchangeable
Y69G203Interchangeable
interchangeable cross-reference
interchangeable
02016122Interchangeable
interchangeable cross-reference
interchangeable
3236264Interchangeable
interchangeable cross-reference
interchangeable
2Z7412-12Interchangeable
interchangeable cross-reference
interchangeable
52004Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28903-5A?
28903-5A is a RING,LOCK,KEYED.
What parts can replace 28903-5A?
There are 15 known substitutes for 28903-5A: 7027, Y69G203, 02016122 and 12 more. Substitute compatibility should be verified for your specific system.
Is 28903-5A still available?
28903-5A 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