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 FAS250 is a fine adjustment screw featuring an integrated knob, a 1/4"-80 thread size, and a 2 1/2" length. Initially released on June 7, 2000, this component has been discontinued by the manufacturer. Although no longer stocked, the FAS250 remains available through special order to support legacy configurations. Submit an RFQ with the exact part number, quantity, and application requirements to obtain current pricing and lead times.
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 FAS250. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.