CNC Turned Brass Valve Bodies and Threaded Pipe Fittings

These are brass valve bodies, elbows, adapters and threaded pipe fittings turned and milled from free-machining brass bar or forged blanks. Ports are drilled, threaded to NPT, BSP or metric standards and sealed faces are finish-turned. They are made for valve, plumbing, gas and fluid-system manufacturers who need custom fittings to their own drawings.

Material: Brass
Tolerance: to ±0.005 mm
MOQ: 1 piece
Prototype lead time: 3–7 days

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NPT, BSP, BSPT and metric threads gauge-checked
C36000, H59, H62 and low-lead brass
Side ports machined on 4-axis after turning
Nickel or chrome plating for exposed fittings

ISO 9001 quality system, 100% critical-dimension inspection

NDA on request; your drawings are never shared

Door-to-door shipping with export documents

Item ref. 1601989217386 ·

Specifications
Process	CNC turning with live tooling, 4-axis milling, tapping
Materials	Brass C36000, H59, H62; low-lead brass; bronze
Surface Finish	As machined, nickel plating, chrome plating, passivation-style cleaning
Threads	NPT, BSP/BSPT, metric; go/no-go gauged
Tolerance	±0.05 mm standard; down to ±0.005 mm on critical features
MOQ	1 piece; prototypes through mid-volume runs
Drawing Formats	STEP, IGES, X_T, STL, DWG, DXF, PDF
Lead Time	Prototypes typically 3–7 working days; production usually 10–20
Inspection	FAI, in-process checks, 100% critical dimensions; CMM

Manufacturing

How we make this part

Process, material options and inspection for cnc turned brass valve bodies and threaded pipe fittings.

Simple fittings are completed on CNC lathes with live tooling, so cross holes and wrench flats are cut in the same setup as the threads. Valve bodies with several ports are turned first and then moved to a 4-axis mill for side ports. Threads are single-point cut or tapped and checked with go/no-go gauges, while seat surfaces get a final light pass for low roughness.

C36000 free-cutting brass machines fastest and leaves a clean finish; H59 and H62 are common Chinese equivalents with slightly different copper content. For potable water, low-lead brass can be specified on the drawing. Bare brass tarnishes, so nickel or chrome plating is common for visible fittings, while internal fluid paths are usually left as machined after deburring and cleaning.

Each batch is checked for thread fit, port position and seat concentricity, and pressure-relevant dimensions are inspected before shipment. Material certificates are available on request. Typical uses are ball and check valve bodies, compression and hose barb fittings, gas regulator housings, manifold blocks and adapters joining metric to imperial threads.

FAQ

Frequently asked questions

Can you machine NPT and BSP threads on the same fitting?

Yes. Adapters that join an NPT port to a BSP or metric port are a common request. Each thread is cut to its own standard and checked with the matching ring or plug gauge. Please state the thread size, class and any sealing requirement, such as a 60° cone or O-ring groove, on the drawing.

Do you pressure test brass valve bodies?

We inspect the dimensions that control sealing, such as seat geometry, thread fit and surface roughness, on every batch. Functional pressure or leak testing can be arranged if the test pressure, medium and acceptance criteria are defined on the drawing or in the purchase order, so please include those details when requesting a quote.

How do I get a quote for cnc turned brass valve bodies and threaded pipe fittings?

Send a 3D model (STEP or IGES) and a 2D drawing with tolerances, material, finish and quantity through the quote form or by email. An engineer replies within 24 hours on business days with price, lead time and any DFM suggestions.