Glass adaptor D40 spherical, with inner thread, SS, satin

The Strofix D40 spherical glass adaptor with inner thread is a stainless-steel point fixing used to mount 8–17.52 mm glass panels to flat surfaces in balustrades, façades, canopies, and architectural glazing, with a threaded spacer that allows fine adjustment of the glass offset during installation. Supplied in AISI 304 with a satin finish, a Ø40 mm domed cover, an M10 fixing, and five selectable spacer heights (10, 22, 32, 42, or 52 mm).

The Ø40 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 Ø15 mm pre-drilled hole and is tightened with an M10 stainless-steel screw that engages the M10 inner thread of the spacer. The threaded spacer lets the installer fine-tune the standoff distance on site — listed as "slightly adjustable" — which is 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 satin finish reduces visible fingerprints and micro-scratches compared to polished stainless steel and suits architectural glazing where a clean, neutral look is required.

Use cases:

• Architectural glass façades and curtain wall point-fixed panels requiring on-site alignment
• Glass canopies, entrance awnings, and porte-cochères with tight alignment tolerances
• Balustrades with toughened or laminated glass up to 17.52 mm where panels must be aligned along a run
• Full-height glass partitions in offices, retail, and hospitality spaces
• Stair side glazing and mezzanine edge protection
• Retrofit installations where wall flatness cannot be guaranteed

FAQ:

What glass thickness does this adaptor support?

The D40 spherical inner-thread adaptor is suitable for glass panels from 8 mm to 17.52 mm thick, covering standard toughened glass and most common laminated glass buildups used in balustrades, façades, and canopies.

Which spacer height should I choose?

The threaded spacer sets the standoff distance between the wall and the glass. Choose 10 mm for minimal offset, 22 or 32 mm for standard wall construction, and 42 or 52 mm where additional clearance is needed for insulation or finish layers. Select the spacer that matches your nominal wall-to-glass distance — the M10 inner thread allows fine on-site adjustment within a small range.

What does "spherical" mean for this adaptor?

The Ø40 mm cover has a rounded, dome-shaped profile rather than a flat disc. The spherical geometry gives the fixing a distinctive visual signature and allows small angular tolerances between the mounting plane and the glass — useful in façade and canopy applications where perfect alignment is hard to guarantee.

How does this differ from the spherical D40 with un-threaded spacer?

Both versions have a Ø40 mm domed cover and use an M10 screw on 8–17.52 mm glass. The un-threaded variant has a single fixed 10 mm spacer and a Ø16 mm glass hole; this inner-thread variant offers five spacer heights (10–52 mm), uses a Ø15 mm glass hole, and adds an M10 internal thread for on-site adjustment. Choose the inner-thread version when alignment tolerances are tight or wall flatness is uncertain.

What size hole must be drilled in the glass?

A minimum Ø15 mm hole is required for the M10 screw. 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.

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.