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Product photo: Mini Null Modem Adapter, DB9 Female to DB9 Female
Product photo

Computer port adapters

Mini Null Modem Adapter, DB9 Female to DB9 Female

Part number 31D1-28400Listed in stock

An adapter changes the physical connection or wiring between specified computer interfaces.

Supplier inventory as of .

$4.17 USD per listed item or pack

Quantity pricing
  • 100+ · $3.75
  • 250+ · $3.48
  • 500+ · $3.20
  • 1000+ · Supplier quote
$4.17 subtotalCableWholesale price checked Nov 13, 2026. Shipping and tax extra.

Specifications

Part number
31D1-28400
Category
Computer port adapters
Construction
Null Modem
Connector references
DB9 Female
GTIN
846568031151

How to use it

Match a legacy serial peripheral to its host by comparing both ports and the equipment wiring diagram.

Check before choosing

The shell shape alone cannot distinguish video, serial, straight-through and crossover wiring.

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