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Technical Data Sheet
PartsTable / MRO / 3121-1
3121-1 ✓ Verified by PartsTable
Trefl · 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include overall_length: 0.250 INCHES NOMINAL IN, shell_material: COPPER ALLOY, insert_material: PLASTIC ALL MATING ENDS, mounting_method: TERMINAL, terminal_length: 1.250 INCHES NOMINAL IN, overall_diameter: 0.343 INCHES NOMINAL 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 5895-01-628-8147, 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→ 3121-1
NSN: 5895-01-628-8147
FSC: 5895
CAGE: 3A5R4 — CONTOUR METROLOGICAL & MANUFACTURING, INC DIV CMM OPTIC (USA)
SPECIFICATIONS
overall_length0.250 INCHES NOMINAL IN
shell_materialCOPPER ALLOY
insert_materialPLASTIC ALL MATING ENDS
mounting_methodTERMINAL
terminal_length1.250 INCHES NOMINAL IN
overall_diameter0.343 INCHES NOMINAL IN
special_featuresWEAPON SYSTEM ESSENTIAL; JUNCTION PATTERN ARRANGEMENT: PNP
features_providedHERMETICALLY SEALED CASE
mating_end_quantity1
contact_removabilityNONREMOVABLE SINGLE MATING END SINGLE CONTACT GROUPING
internal_configurationJUNCTION CONTACT
semiconductor_materialGERMANIUM
NSN5895-01-628-8147
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Trefl CONNECTOR,RECEPTACLE,ELECTRICAL TITLE COMPONENT PN 3121-1 MFR Trefl CONNECTOR,RECEPTACLE,E
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
JANC71Interchangeable
interchangeable cross-reference
interchangeable
UG262BUInterchangeable
interchangeable cross-reference
interchangeable
31-211Interchangeable
interchangeable cross-reference
interchangeable
215-00462-1Interchangeable
interchangeable cross-reference
interchangeable
T51602Interchangeable
interchangeable cross-reference
interchangeable
1850-0062Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3121-1?
3121-1 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by Trefl. It is classified as a MRO (MRO_GENERAL).
What parts can replace 3121-1?
There are 8 known substitutes for 3121-1: JANC71, UG262BU, 31-211 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3121-1?
3121-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5895-01-628-8147. 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