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PM21953 — SWITCH,PUSH

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

PM21953: SWITCH,PUSH.

The SWITCH,PUSH is a the manufacturer industrial component. Key specifications include body_style: PANEL MOUNT, body_length: 0.888 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN, body_diameter: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN, overall_width: 0.622 INCHES NOMINAL IN, actuator_style: ROUND, inclosure_type: FULLY INCLOSED. This part is cataloged in the U.S.

Government catalog under NSN 5930-00-687-1973, 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
PM21953
NSN: 5930-00-687-1973
FSC: 5930 — Switches
CAGE: 59501 — UNISON INDUSTRIES LLC (USA)
SPECIFICATIONS
body_stylePANEL MOUNT
body_length0.888 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
body_diameter0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
overall_width0.622 INCHES NOMINAL IN
actuator_styleROUND
inclosure_typeFULLY INCLOSED
overall_height0.624 INCHES NOMINAL IN
overall_length1.375 INCHES MAXIMUM IN
actuator_height0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
mounting_methodPANEL
actuator_diameter0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
features_providedACTUATOR SEAL
NSN5930-00-687-1973
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,PUSH TITLE COMPONENT PN PM21953 MFR SWITCH,PUSH
KEY FEATURES
•
BODY DIAMETER: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
•
ACTUATOR DIAMETER: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
INCLOSURE TYPE: FULLY INCLOSED
•
BODY STYLE: PANEL MOUNT
•
ACTUATOR STYLE: ROUND
•
MOUNTING METHOD: PANEL
TECHNICAL CHARACTERISTICS
BODY DIAMETER0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
OVERALL HEIGHT0.624 INCHES NOMINAL IN
ACTUATOR DIAMETER0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
INCLOSURE TYPEFULLY INCLOSED
BODY STYLEPANEL MOUNT
ACTUATOR STYLEROUND
MOUNTING METHODPANEL
OVERALL LENGTH1.375 INCHES MAXIMUM IN
OVERALL WIDTH0.622 INCHES NOMINAL IN
FEATURES PROVIDEDACTUATOR SEAL
SUBSTITUTES & CROSS-REFERENCES 5
21953Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
MIL-PRF-8805/3Reference document
Same NSN cross-reference
Reference document — Identification reference
MS25089-5ARSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MILS8805-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
W105MB4RReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PM21953?
PM21953 is a SWITCH,PUSH.
What parts can replace PM21953?
There are 5 known substitutes for PM21953: 21953, MIL-PRF-8805/3, MS25089-5AR and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PM21953?
PM21953 is cataloged in the U.S. Government catalog under NSN 5930-00-687-1973. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.