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PartsTable / COMPONENT / B743
B743 ✓ Verified by PartsTable
— · NIC ADAPTER
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,ETHERNET is a the manufacturer networking component designed for high-speed data center interconnects and enterprise network infrastructure. Key specifications include diameter: 1.250 INCHES NOMINAL IN, material: BRONZE OVERALL, wheel_style: STRAIGHT, corner_shape: SQUARE OUTSIDE LEFT CORNER, flange_width: 0.0605 INCHES MINIMUM AND 0.0645 INCHES MAXIMUM IN, usage_design: GLASS WORKING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-755-1306, 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
B743
NSN: 5120-00-755-1306
FSC: 5120
CAGE: 77292 — PIONEER AEROSPACE CORP ENGINEERING DIV (USA)
SPECIFICATIONS
diameter1.250 INCHES NOMINAL IN
materialBRONZE OVERALL
wheel_styleSTRAIGHT
corner_shapeSQUARE OUTSIDE LEFT CORNER
flange_width0.0605 INCHES MINIMUM AND 0.0645 INCHES MAXIMUM IN
usage_designGLASS WORKING
hole_diameter1.250 INCHES NOMINAL IN
overall_length0.50 INCHES NOMINAL IN
wheel_diameter7.000 INCHES NOMINAL IN
mounting_methodARBOR HOLE
style_designatorSOLID, EXTERNAL FLANGE ONE END
overall_thickness0.500 INCHES NOMINAL IN
NSN5120-00-755-1306
COMPONENT DIAGRAM
NIC CTRL PHY 0 PHY 1 ROM VRM SFP+ SFP+ LINK ACT PCIe x8 ~167 mm NETWORK ADAPTER | 2-PORT 10GbE | SFP+ | Full Height PCIe x8 | Link/Activity LEDs | PXE boot ROM TITLE NIC ADAPTER PN B743 MFR OEM SWITCH,ETHERNET
TYPICAL APPLICATIONS
  • Data center top-of-rack switching
  • High-speed server interconnects (10G/25G/40G/100G)
  • Storage network fabric (iSCSI, FCoE)
  • Campus and branch network infrastructure
  • Firewall and security appliance connectivity
  • WAN edge and SD-WAN deployments
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
FF520-5Interchangeable
interchangeable cross-reference
interchangeable
6954Interchangeable
interchangeable cross-reference
interchangeable
B74.13Interchangeable
interchangeable cross-reference
interchangeable
B7.1Interchangeable
interchangeable cross-reference
interchangeable
B743Interchangeable
interchangeable cross-reference
interchangeable
79C0370-00Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B743?
B743 is a SWITCH,ETHERNET.
What parts can replace B743?
There are 7 known substitutes for B743: FF520-5, 6954, B74.13 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B743?
B743 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-755-1306. 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