PartsTable
Technical Data Sheet
PartsTable / MRO / 129121
129121 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
SR = Short Range (multimode, 300m) | LR = Long Range (single-mode, 10km) DOM = Digital Optical Monitoring — most enterprise SFPs support it
MATCH ALL THREE: Speed + Wavelength + Brand compatibility
PRODUCT OVERVIEW

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include width: 4.000 INCHES NOMINAL IN, length: 4.000 INCHES NOMINAL IN, usage_form: SHEET, special_features: KEEPS WEIGHING MACHINE CLEAN; MOISTURE RESISTANT; NON-ABBSORBENT, part_name_assigned_by_controlling_agency: PAPER GLASSINE SHEET 4X4" MOISTURE RESISTANT NONABSORBENT 500S. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-135-3978, 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→ 129121
NSN: 5961-00-135-3978
FSC: 5961
CAGE: 21845 — SOLITRON DEVICES, INC. (USA)
SPECIFICATIONS
width4.000 INCHES NOMINAL IN
length4.000 INCHES NOMINAL IN
usage_formSHEET
special_featuresKEEPS WEIGHING MACHINE CLEAN; MOISTURE RESISTANT; NON-ABBSORBENT
part_name_assigned_by_controlling_agencyPAPER GLASSINE SHEET 4X4" MOISTURE RESISTANT NONABSORBENT 500S
NSN5961-00-135-3978
COMPONENT DIAGRAM
BAIL LATCH 10G SFP+ 850nm · SR (MMF, 300m) DOM: Digital Optical Monitoring TX RX LC DUPLEX 20-PIN EDGE CONNECTOR ~56.5 mm ~13.4mm SFP+ TRANSCEIVER | 10G | 850nm | SR (MMF, 300m) Hot-swappable | LC duplex fiber | DDM/DOM supported TITLE SFP+ XCVR PN 129121 MFR OEM CONNECTOR,RECEPTACLE,ELECTRICAL
KEY FEATURES
•
CIRCUIT CONNECTION STYLE DESIGNATOR: HALF-WAVE 1 PHASE
•
MATERIAL: SILICON
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH5.000 INCHES NOMINAL IN
OVERALL WIDTH2.000 INCHES NOMINAL IN
CIRCUIT CONNECTION STYLE DESIGNATORHALF-WAVE 1 PHASE
MATERIALSILICON
OVERALL HEIGHT1.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
12912-1Interchangeable
interchangeable cross-reference
interchangeable
0989812BInterchangeable
interchangeable cross-reference
interchangeable
00025715664316Interchangeable
interchangeable cross-reference
interchangeable
AEPUDDUInterchangeable
interchangeable cross-reference
interchangeable
91936869Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 129121?
129121 is a CONNECTOR,RECEPTACLE,ELECTRICAL. It is classified as a MRO (MRO_GENERAL).
What parts can replace 129121?
There are 5 known substitutes for 129121: 12912-1, 0989812B, 00025715664316 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 129121?
129121 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-135-3978. 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