1/2 npt bulkhead fittings is a drawing-based bulkhead fitting we machine at Yuhuan Hongqian Machinery Co., Ltd. in Yuhuan, Zhejiang, China. Buyers usually need it for passing a line through a panel, tank wall, or enclosure with a serviceable seal.

What we check before quoting

Most delays come from fuzzy prints. For this bulkhead fitting, we look early at:

• hole size vs body
• seal / locknut stack-up
• barb vs threaded outlet

Materials, threads, and finish

Materials: 1020, 1045, 12L14, 1215, Q235B, 42crmo etc. (High strength and excellent machinability).    / 201,304, 316, 316L, 303, etc. (For superior corrosion resistance and high-hygiene environments).

Threads: NPT, NPTF, BSPP (G), BSPT (R/RP), Metric (M), UNF, UNEF, etc. (99% verified by Go/No-Go gauges).

Finish: Electroless Nickel Plating, Zinc Plating (Clear/Yellow), Passivation, Anodizing, Black Oxide, Heat treatment , Chrome plated,Dacromet,etcs.

Tolerance reference: Standard Tolerance:±0.02mm Critical dims should still be marked on your 2D.

Where this product usually shows up

Panel boxes, tanks, and machine enclosures that need a clean pass-through without reinventing the seal stack every revision.

We don’t invent pressure ratings or media compatibility here. If your drawing or customer spec states them, we machine and inspect to those callouts.

How this part is usually made

Body, seal face, and outlet (NPT or barb) are machined to the print. Panel hole and wall thickness need to be on the RFQ—we don’t guess stack-up.

Capability note from our spec sheet: Hot Forging / Red Punching: Eliminates internal porosity and enhances high-pressure resistance. Cold Heading: Ideal for high-speed, cost-effective mass production. Precision CNC…

First articles can include dimensional checks on the critical features you mark. Say what you need on the RFQ so inspection matches your buyer pack.

What to send for a quote

Email info@sspipefitting.com or use the inquiry form on this page. A clean package looks like:

• CAD/STEP + 2D with tolerances
• Material grade and finish
• Thread standard on each port
• Quantity (pilot + annual if known)
• Any documents you need (MTR, dimensional report)

MOQ guidance: Moq 2000pcs . Pilot lots are discussable once the drawing is frozen.

Category page for context: Carbon steel pipe fittings. The controlling document for this SKU is still your drawing.