Brass Turned Fittings Sourcing Guide for Aerospace Suppliers: the 2026-2027 cycle Guide No.943

For Canada, brass turned fittings sit inside a longer supply chain, and a small dimensional error at the machine shop becomes a large assembly problem downstream. Below is a practical, step-by-step view written for Aerospace Suppliers that want fewer rejects and fewer schedule surprises.

Where the Price Actually Comes From

Ask for a cost breakdown by operation; it turns a price argument into a process conversation. Most quotation gaps come from a different material grade, a different finishing route or a different inspection level, not from shop margin. Watch the metal index and the energy surcharge, because both move the cost of brass turned fittings during a long programme.

Inspection That Prevents Rejects

Book a first article inspection before the run is released, and require the report to list every dimension against the drawing. Agree the sampling plan and the inspection level in writing, so acceptance is a calculation rather than an opinion. The critical test for brass turned fittings is leak test and dimensional spot check, and it belongs on the inspection plan as a numbered characteristic.

Material and Machining Basics

Material typically accounts for more than half of the part price, so a small grade change moves the quotation a long way. Cheap substitutes usually appear in the material grade and the finishing step, so inspect those areas first. The capability buyers pay for is machinability and sealing surfaces, and it comes from the free-cutting brass rod combined with a controlled process.

Documents and Standards to Request

Traceability claims need heat numbers or lot numbers that follow the parts through every operation. Confirm that the test house is accredited and that the report names your material or your part, not a generic specimen. Surface treatments and coatings carry their own documentation, so keep the process certificates on file for the programme.

From the Machine Shop to Your Dock

Label every carton with the part number, revision, lot and quantity so that receiving is quick and accurate. Confirm who arranges the export documents and the certificate of origin, because that task is often assumed by both sides. Insist on moisture protection and, where required, vacuum packing, because damp cartons are a common cause of claims.

Choosing the Right Supplier

Find out whether the shop runs a formal first-article process or simply measures the first good part and ships it. A supplier that can show recent brass turned fittings inspection reports is a safer partner than one that only shows photographs of finished parts. Confirm who owns the drawings, the fixtures and the part programme, especially if you may move the part to another supplier later. Ask the shop how many machines run brass turned fittings and whether your order shares a machine with another customer.

What to Confirm Before Releasing the Order

Freeze, approve, inspect, pack, document. Those five verbs separate a calm programme from an expensive one.