1/8" Straight-Thru Coupler x 1/8" Female NPT, Brass | Foster 12FS

Foster 12FS is a 1/8" body straight-thru quick coupler: no valve in the coupler or the plug, so the bore is wide open for full flow of air, water, fluids or bulk material. 1/8" Female NPT end, brass body, Buna-N seal, rated 2,500 PSI working pressure, -40°F to 250°F.

Straight-thru couplers trade shut-off for flow. There is no valve to restrict the line, so they are the pick for hydraulic test lines, high-flow air, water and chemical transfer, and anywhere pressure drop matters. The line does not self-seal when you disconnect, so shut the supply off first. Industrial interchange profile; only same-size halves couple.

Made in the USA by Foster to industrial spec: machined bar stock, hardened wear surfaces, and seals you can replace instead of throwing the coupler away. This is the same part used on production hydraulics and fluid handling equipment, not a light-duty import.

Not sure which size or interface you have? Email support@industrialsupplyworld.com with a photo of the mating half and we will match it.