Precision CNC Machined Aluminum Components

FlexiTurn provides custom CNC turning and milling for black-anodized aluminum bulkhead fittings like those shown above. Each fitting features an externally threaded port with multiple O-ring grooves, an internal threaded bore, a threaded side branch port, a smooth through cross-hole, wrenching hex flats, and a base flange. FlexiTurn machines these components from certified 6061-T6 aluminum bar stock for fluid connection applications.

FlexiTurn selects 6061-T6 for its machinability, anodizing consistency, and low-to-mid pressure rating. For bulkhead fittings, leak-tight performance depends on O-ring groove dimensions, thread-to-bore concentricity, and side port position. Multi-setup machining can cause groove variation, misalignment, and uneven depth, leading to leakage. FlexiTurn uses datum-aligned turning and indexed drilling to minimize these risks and deliver repeatable seal geometry from prototype to production.

FlexiTurn performs all core connector machining in-house.

CNC Turning: External thread, O-ring grooves, internal bore, internal thread, and base flange are turned from solid bar in a single setup, controlling thread-to-bore concentricity. O-ring groove width and depth are cut to specification on the CNC lathe.

Hex Milling: Wrenching hex flats are milled on a 3-axis machining center with the part held on a turned arbor, maintaining hex-to-bore alignment.

Indexed Drilling & Tapping: Side threaded port and opposite through cross-hole are drilled and tapped on an indexed fixture, controlling angular position relative to the main bore.

Surface Finish: Black Type II anodizing applied after machining; O-ring groove and thread dimensions are pre-compensated for coating thickness.

Standard material: 6061-T6 aluminum, certified bar stock

On request: 304/316L stainless (higher pressure/corrosion), brass (fluid industry standard)

O-ring groove tolerance: ±0.02 mm on groove width and depth

External thread tolerance: ISO 6g / UN 2A standard

Thread-to-bore concentricity: ≤ 0.02 mm

Side port angular position: ±0.5° relative to main bore

Surface finish: Black Type II anodize

Maximum turning diameter: 300 mm

O-ring groove precision — groove width and depth controlled to ±0.02 mm on the CNC lathe, supporting correct seal compression from first article to production.

Datum-aligned turning and drilling — main bore and side port referenced to a common datum, minimizing cross-position drift.

Anodize pre-compensation — thread and groove dimensions held before coating so seal fit is preserved after black anodize.

Fluid-industry material matrix — 6061-T6 standard; stainless for higher pressure/corrosion; brass for fluid industry compatibility.

Prototypes to production — bar-stock machined parts, no casting tooling required.

• Submit 2D/3D drawings with thread spec, O-ring size, port layout, and quantity.
• Receive a fluid-connector-specific DFM review and quote from FlexiTurn.
• Prototype fittings delivered with inspection report and material certificate.
• Volume production with locked process parameters.

For custom aluminum bulkhead fluid connectors with O-ring groove precision and port alignment control, contact FlexiTurn with your drawings.

FlexiTurn – Precision Machining, Delivered with Trust.

Q1. What types of machining services do you offer?

We provide comprehensive CNC turning and milling services. FlexiTurn machines are equipped with 8-station programmable turrets and support both turning and 5-axis milling operations, making them suitable for everything from simple cylindrical parts to complex multi-axis components.

Q2. What materials can you work with?

We machine a wide range of materials including carbon steel, stainless steel, aluminum, plastics, and other engineering-grade materials. If you have a specific material in mind, just send us your requirements and we'll confirm feasibility.

Q3. What is your typical lead time?

Lead times vary depending on part complexity, quantity, and material availability. For prototypes and small-batch runs, we typically deliver within 5–10 business days. For high-volume production, we'll provide a customized schedule after reviewing your drawings. Contact us with your project details for an accurate timeline.

Q4. How do you price your services?

Pricing is based on several factors: material cost, machining time, tooling requirements, setup complexity, and order quantity. We offer competitive rates for both low-volume prototypes and high-volume production runs. Request a quote with your CAD files or drawings and we'll get back to you within 24 hours.

Q5. What quality control measures do you have in place?

We follow strict quality control procedures throughout the machining process. Our CNC systems support programmable precision down to 1 μm, ensuring high accuracy and repeatability. Every batch undergoes dimensional inspection before shipping, and we can provide inspection reports upon request.