This product is a coupling body for pneumatic systems: a 1/2 inch female tapered (BSPT) M100-series coupling body designed to accept M100 quick-coupler inserts and to join compressed-air hoses and tools. Its primary use is as the threaded receptacle in a quick-release coupling assembly, allowing rapid connection and disconnection of air lines in workshops, garages and on-site plant equipment.

The body is manufactured from nickel‑plated brass (material grade CW614N) to provide a balance of strength and corrosion resistance in typical workshop environments. The external thread is 1/2" BSP tapered (BSPT) conforming to ISO 7‑1 / BS EN 10226‑1 pipe‑thread form for pressure‑tight joints; the internal coupling interface is compatible with the Draper M100 quick‑coupler geometry (Draper ref. DR25814). As a threaded coupling body it has no head or drive; installation requires a suitable spanner on the wrench flats and correct sealing practice (PTFE tape or pipe sealant) on the BSPT thread.

Typical applications for this coupling body include compressed‑air distribution manifolds, hose reels, portable air tools, tyre inflation rigs and pneumatic maintenance stations. Industries that commonly use the component are automotive repair, plant maintenance, light manufacturing, construction and agricultural servicing, where rapid hose changeover and reliable threaded connections are required.

Key benefits include good corrosion resistance from the nickel plating, the dimensional compatibility with established BSPT thread standards, and material toughness from CW614N brass to resist galling and wear in repeated connect/disconnect cycles. The part is suitable for standard workshop air pressures (commonly up to 10–12 bar when used with matched M100 components and correctly installed seals), and it mates with other M100‑series Draper couplers and widely used BSP tapered fittings, ensuring cross‑system compatibility.

Duchy Fasteners stocks the M100 coupling body and a full range of complementary items in the M100 family, including coupler plugs, hose adaptors and shut‑off nipples. Available sizes and pack options include single pieces and multi‑packs; please contact us for current stock levels and pack quantities.