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340A3990 — DETENT,SWITCH

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

340A3990: DETENT,SWITCH.

The DETENT,SWITCH is a the manufacturer industrial component. Key specifications include shaft_width: 0.186 INCHES MAXIMUM IN, nominal_size: 0.250 INCHES FRONT END IN, shaft_length: 0.250 INCHES NOMINAL IN, overall_width: 0.812 INCHES NOMINAL IN, bushing_length: 0.375 INCHES NOMINAL IN, overall_height: 1.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5930-00-548-5004, 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→ 340A3990
NSN: 5930-00-548-5004
FSC: 5930 — Switches
CAGE: 1VPW8 — GENERAL DYNAMICS MISSION SYSTEMS, INC. DBA GDMS (USA)
SPECIFICATIONS
shaft_width0.186 INCHES MAXIMUM IN
nominal_size0.250 INCHES FRONT END IN
shaft_length0.250 INCHES NOMINAL IN
overall_width0.812 INCHES NOMINAL IN
bushing_length0.375 INCHES NOMINAL IN
overall_height1.500 INCHES NOMINAL IN
overall_length1.906 INCHES NOMINAL IN
mounting_methodBUSHING
bushing_diameter0.375 INCHES NOMINAL IN
stop_adjustabilityNONADJUSTABLE
switch_position_quantity6
mounting_threads_per_inch32
NSN5930-00-548-5004
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available DETENT,SWITCH TITLE COMPONENT PN 340A3990 MFR DETENT,SWITCH
KEY FEATURES
•
BUSHING LENGTH: 0.375 INCHES NOMINAL IN
•
MOUNTING METHOD: BUSHING
•
SWITCH POSITION QUANTITY: 6
•
STOP ADJUSTABILITY: NONADJUSTABLE
•
SHAFT LENGTH: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
BUSHING LENGTH0.375 INCHES NOMINAL IN
OVERALL HEIGHT1.500 INCHES NOMINAL IN
MOUNTING METHODBUSHING
SWITCH POSITION QUANTITY6
OVERALL LENGTH1.906 INCHES NOMINAL IN
OVERALL WIDTH0.812 INCHES NOMINAL IN
STOP ADJUSTABILITYNONADJUSTABLE
SHAFT LENGTH0.250 INCHES NOMINAL IN
BUSHING DIAMETER0.375 INCHES NOMINAL IN
POSITIONING INCREMENTS IN DEG30.0
SUBSTITUTES & CROSS-REFERENCES 2
PS028Reference document
Same NSN cross-reference
Reference document — Secondary reference
269-1721-00Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 340A3990?
340A3990 is a DETENT,SWITCH. It is classified as a MRO (MRO_GENERAL).
What parts can replace 340A3990?
There are 2 known substitutes for 340A3990: PS028, 269-1721-00. Substitute compatibility should be verified for your specific system.
What is the NSN for 340A3990?
340A3990 is cataloged in the U.S. Government catalog under NSN 5930-00-548-5004. 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.