PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28903-5ARing,lock,keyed

Triumph Engine Control Systems Llc · NSN 5365-00-812-1756 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-812-1756 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-812-1756. Primary manufacturer part number: 28903-5A.
Features
  • Ring,lock,keyed — FSC 5365
  • 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
  • 3 verified cross-references
Applications
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Ring,lock,keyed, cataloged under National Stock Number 5365-00-812-1756, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5365-00-812-1756
Primary Part Number28903-5A
Item NameRing,lock,keyed
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerTriumph Engine Control Systems Llc
StatusCANCELLED
MaterialSTEEL CORROSION RESISTING
Surface TreatmentPASSIVATE
Key Width0.076 INCHES MAXIMUM IN
Overall Outside Diameter0.432 INCHES MAXIMUM IN
Key Length0.156 INCHES MAXIMUM IN
Inside Diameter0.375 INCHES MINIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4820-00-036-13727027 INTERCHANGEABLE
Valve,flow Control
O. C. Keckley Company
3110-00-120-3104 INTERCHANGEABLE
Bearing,roller,needle
5815-00-126-42197027 INTERCHANGEABLE
Roller
Telemechanics Inc
5935-00-259-53142Z7412-12 INTERCHANGEABLE
Connector,receptacle,electrical
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6240-00-389-482230950000 INTERCHANGEABLE
Lamp,incandescent
Kollmorgen Corp Macbeth Div
5935-00-928-7851357-7207-090 INTERCHANGEABLE
Connector,receptacle,electrical
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5950-00-943-12497236254P006 INTERCHANGEABLE
Coil,radio Frequency
Lockheed Martin Corporation Div Rms
4920-01-038-09847027 INTERCHANGEABLE
Test Set,electronic Systems
Dne Technologies, Inc
6150-01-050-9724 INTERCHANGEABLE
Cable Assembly,power,electrical
5330-01-227-86897027 INTERCHANGEABLE
Seal,nonmetallic Special Shaped
Kirkhill Inc Div Kirkhill Inc, Haskon Division
Cross-Reference Index
Part NumberManufacturer
KR7A15 Stanley Engineered Fastening Llc (USA)
28903-5A PRIMARY Triumph Engine Control Systems Llc (USA)
702-7 Stanley Engineered Fastening Llc (USA)
Related Parts
4820-00-036-1372INTERCHANGEABLE
VALVE,FLOW CONTROL
7027
3110-00-120-3104INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
5815-00-126-4219INTERCHANGEABLE
ROLLER
7027
5935-00-259-5314INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
2Z7412-12
6240-00-389-4822INTERCHANGEABLE
LAMP,INCANDESCENT
30950000
5935-00-928-7851INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
357-7207-090
5950-00-943-1249INTERCHANGEABLE
COIL,RADIO FREQUENCY
7236254P006
4920-01-038-0984INTERCHANGEABLE
TEST SET,ELECTRONIC SYSTEMS
7027
6150-01-050-9724INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
5330-01-227-8689INTERCHANGEABLE
SEAL,NONMETALLIC SPECIAL SHAPED
7027
6105-01-369-3066INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
E9928
2090-01-653-0053INTERCHANGEABLE
TREAD,METALLIC,NONSKID
70-27

Frequently Asked Questions

What is NSN 5365-00-812-1756?

NSN 5365-00-812-1756 is a Ring,lock,keyed, manufactured by Triumph Engine Control Systems Llc, classified under FSC 5365 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5365-00-812-1756?

NSN 5365-00-812-1756 has 3 cross-referenced part numbers: KR7A15 (Stanley Engineered Fastening Llc), 28903-5A (Triumph Engine Control Systems Llc), 702-7 (Stanley Engineered Fastening Llc).

What NSN replaces 5365-00-812-1756?

There are 12 known substitutes for 5365-00-812-1756: 4820-00-036-1372, 3110-00-120-3104, 5815-00-126-4219 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 28903-5A?

Key specifications for 28903-5A: Special Features: A SERIES, THIN WALL; Material: STEEL CORROSION RESISTING; Surface Treatment: PASSIVATE; Key Width: 0.076 INCHES MAXIMUM IN. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5365-00-812-1756 still in active supply?

NSN 5365-00-812-1756 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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