Custom 304 Stainless Steel Sealing Cover | Polished Flange End Cap

This flange-type sealing cover is a precision closure component machined from solid 304 stainless steel. It adopts an integrated turn-milling structure with counterbore mounting holes and stepped inner bore designed for O-ring installation, delivering reliable sealing performance for chambers, fluid passages and custom tooling housings.

Key Features

Material: 304 Stainless Steel. Outstanding corrosion resistance, suitable for wet, humid and mild chemical environments ✅

Precision Machining: CNC turning & milling, clean burr-free edges. Strict dimensional & geometric tolerance following GB standards ✅

Surface Finish: Mirror / fine polishing as required, smooth surface for better sealing fit and easy cleaning ✅

Flange Counterbore Design: Pre-machined countersunk holes for flat-head fasteners, flush mounting ✅

Flexible Customization: Adjust outer diameter, inner groove size, hole layout, groove specification and polishing grade per your CAD drawings. Prototype and bulk production supported

Typical Applications

· Hydraulic / pneumatic chamber sealing end cap

· Automation fixture housing closure cover

· Fluid tank & pipeline sealing component

· Testing equipment pressure chamber cover

· Food & sanitary equipment sealing parts

Why Choose Us

We complete full in-house CNC machining, deburring and polishing. Our team can optimize O-ring groove geometry for better sealing reliability before production. We provide dimension inspection records upon request. Whether you need small trial samples or repeat mass orders, we maintain stable quality and predictable lead time.

Send your drawing for quotation and lead time.