Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Thorlabs
The Thorlabs 30125D1 is an FC/PC adjustable key connector for polarization-maintaining (PM) fiber featuring a ø125.5 µm bore and compatibility with ø3.0 mm and ø900 µm boots. Released on June 16, 2014, this component reached its discontinued date on May 23, 2016, and has been officially replaced by model 30125D2. Submit the exact part number, quantity, and application requirements to request a quote for this discontinued item.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Thorlabs references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Thorlabs 30125D1. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.