Glass adaptor D50 spherical, with inner thread, SS, polished

The Strofix D50 polished spherical glass adaptor with inner thread is a stainless-steel point fixing used to mount 8–21.52 mm glass panels to flat surfaces in decorative balustrades, façades, and architectural glazing, with a threaded spacer that allows fine on-site adjustment of the glass offset. Supplied in AISI 304 with mirror-polished finish, a Ø50 mm domed cover, an M10 fixing, and two selectable spacer heights (22 or 32 mm).

The Ø50 mm spherical (domed) cover gives the fixing a distinctive rounded profile and allows small angular deviations between the glass and the mounting surface, which is useful in façade and canopy applications where perfect planarity cannot be guaranteed. Each adaptor secures the glass through a single Ø17 mm pre-drilled hole, with a 16 mm inner bushing diameter, and is tightened with an M10 stainless-steel screw that engages the M10 inner thread of the chosen 22 or 32 mm spacer. The threaded spacer lets the installer fine-tune the standoff distance on site — listed as "slightly adjustable" — useful for aligning multiple panels along a façade or compensating for substrate irregularities. AISI 304 is the standard chromium-nickel stainless steel and provides reliable corrosion resistance for indoor installations and standard protected outdoor environments away from coastal conditions.

The polished finish produces a bright, mirror-like surface that reflects surrounding light and visually integrates with chrome and glass interiors. Compared to a satin finish, polished stainless steel offers a more decorative, high-shine appearance, but shows fingerprints and fine surface marks more readily — usually preferred for indoor or protected settings where appearance is the main driver.

Use cases:

• Hotel lobbies, showrooms, and luxury retail glazing where reflective hardware is preferred
• Decorative architectural glass façades and curtain wall point-fixed panels
• Heavy-duty balustrades with thick toughened or laminated glass up to 21.52 mm in interior environments
• Glass canopies and entrance awnings in decorative settings
• Full-height glass partitions and atrium walls in commercial interiors
• Retrofit installations where finish layers add depth and tolerances must be absorbed on site

FAQ:

What glass thickness does this adaptor support?

This D50 polished spherical inner-thread adaptor is suitable for glass panels from 8 mm to 21.52 mm thick, covering standard toughened glass and thicker structural laminated glass buildups commonly used in architectural façades and heavy-duty balustrades.

Which spacer height should I choose?

The threaded spacer sets the standoff distance between the wall and the glass. Choose 22 mm for standard wall construction, and 32 mm where additional clearance is needed for insulation, finish layers, or a slightly deeper shadow gap. The M10 inner thread allows fine on-site adjustment within a small range.

What does the inner thread enable?

The selected spacer has an M10 internal thread that engages the screw directly. The installer can rotate the fixing to fine-tune the standoff distance on site — listed as "slightly adjustable". This is useful for aligning multiple panels precisely along a run or compensating for small substrate irregularities.

What is the difference between polished and satin finish?

The polished finish is mirror-bright and highly reflective, suited to decorative interiors, luxury retail, and hospitality environments. The satin finish is matte and reduces visible fingerprints and micro-scratches. Polished hardware shows handling marks more readily, so it is generally preferred for indoor or protected settings where appearance is the main selection driver.

What size hole must be drilled in the glass?

A minimum Ø17 mm hole is required for the M10 screw. The adaptor uses a 16 mm inner bushing diameter. The hole must be pre-drilled by the glass supplier before tempering — toughened glass cannot be cut or drilled after heat treatment.

What stainless steel grade is used?

This SKU is supplied in AISI 304, the standard chromium-nickel stainless steel. AISI 304 provides reliable corrosion resistance for indoor installations and standard protected outdoor environments. For coastal, pool, or chloride-rich locations, a higher-grade stainless steel such as AISI 316 should be specified — available on the satin D50 spherical inner-thread variant.

About glass adaptors

A glass adaptor is a stainless-steel point fixing that attaches a glass panel to a supporting structure through a drilled hole in the glass. It transfers load from the panel to the substrate while keeping visible hardware to a minimum, leaving the glass as the main visual element in balustrades, façades, partitions, canopies, and shower enclosures.

Strofix supplies round glass adaptors from Ø12 mm up to Ø70 mm (including D30, D38, D40, D50, D60 and D70) plus square 38×38 and 40×40 versions, in AISI 201, AISI 304 and AISI 316 stainless steel, with satin, polished or painted finishes and a broad range of spacer heights. The right adaptor depends on glass thickness, wall-to-glass offset, environment and the type of supporting surface.

Glass adaptors are essential components used to securely connect glass panels to supporting structures while maintaining a clean, modern appearance. They are widely applied in glass railings, partitions, façades, canopies, and other architectural systems where both stability and design matter. By creating a reliable fixing point between glass and metal or wall-mounted surfaces, glass adaptors help distribute load evenly and ensure structural safety without compromising transparency.