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PartsTable / COMPONENT / 31-3977-1
31-3977-1 ✓ 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 SWITCH,TELEPHONE,SELECTOR is a the manufacturer industrial component. Key specifications include color: CLEAR LENS, material: GLASS LENS, flange_width: 0.641 INCHES NOMINAL IN, overall_height: 0.410 INCHES NOMINAL IN, mounting_method: SCREW RING, overall_diameter: 4.120 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-092-1844, 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
31-3977-1
NSN: 6625-01-092-1844
FSC: 6625
CAGE: 22915 — NORTHROP GRUMMAN CORP ELECTRONIC SYSTEMS DEFENSIVE SYSTEM DIV (USA)
SPECIFICATIONS
colorCLEAR LENS
materialGLASS LENS
flange_width0.641 INCHES NOMINAL IN
overall_height0.410 INCHES NOMINAL IN
mounting_methodSCREW RING
overall_diameter4.120 INCHES MAXIMUM IN
style_designatorCONVEX
unable_to_decodeUNABLE TO DECODE
surface_conditionSMOOTH FACE
effective_diameter2.750 INCHES NOMINAL IN
end_item_identificationACFT MODEL B52G
light_transmission_designTRANSLUCENT LENS
NSN6625-01-092-1844
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,TELEPHONE,SELECTOR TITLE COMPONENT PN 31-3977-1 MFR SWITCH,TELEPHONE,SELEC
KEY FEATURES
•
UNABLE TO DECODE: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS (FLIS)
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
UNABLE TO DECODEUNABLE TO DECODE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
31-3977-1Interchangeable
interchangeable cross-reference
interchangeable
1670-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31-3977-1?
31-3977-1 is a SWITCH,TELEPHONE,SELECTOR.
What parts can replace 31-3977-1?
There are 2 known substitutes for 31-3977-1: 31-3977-1, 1670-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 31-3977-1?
31-3977-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-092-1844. 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