PartsTable
Technical Data Sheet
PartsTable / MRO / 21903-1
21903-1 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 SWITCH,PRESSURE is a the manufacturer industrial component. Key specifications include style_designator: CYLINDRICAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-966-2645, 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
MRO→ MRO_GENERAL→ 21903-1
NSN: 5930-00-966-2645
FSC: 5930
CAGE: 58918 — AEROSPACE CONTROL PRODUCTS, INC. DBA AEROSPACE CONTROL PRODUCTS INC (USA)
SPECIFICATIONS
style_designatorCYLINDRICAL
NSN5930-00-966-2645
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,PRESSURE TITLE COMPONENT PN 21903-1 MFR SWITCH,PRESSURE
KEY FEATURES
•
STYLE DESIGNATOR: CYLINDRICAL
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCYLINDRICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
21903Interchangeable
interchangeable cross-reference
interchangeable
14527Interchangeable
interchangeable cross-reference
interchangeable
56351Interchangeable
interchangeable cross-reference
interchangeable
4111646Interchangeable
interchangeable cross-reference
interchangeable
1903Interchangeable
Same NIIN cross-reference
interchangeable
28625PC21903Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21903-1?
21903-1 is a SWITCH,PRESSURE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21903-1?
There are 6 known substitutes for 21903-1: 21903, 14527, 56351 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21903-1?
21903-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-966-2645. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026