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

The Strofix D40 spherical adjustable glass adaptor with inner thread is a stainless-steel point fixing used to mount 8–21.52 mm glass panels to flat surfaces in balustrades, façades, canopies, and architectural glazing, with a continuously adjustable spacer that covers a 35–48 mm standoff range and an internally threaded spacer for additional fine-tuning. Supplied in AISI 304 with a satin finish, a Ø40 mm domed cover, and an M12 × 150 mm screw.

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. The spacer can be set to any standoff distance from 35 mm to 48 mm during installation, and the M10 inner thread in the spacer provides additional fine adjustment once the telescoping mechanism is positioned. Each adaptor secures the glass through a single Ø18 mm pre-drilled hole, with a 17 mm inner bushing diameter, and is clamped by a long M12 × 150 mm stainless-steel screw — the extended screw length is matched to the deep spacer range and allows anchorage into substrates behind insulation and finish layers. 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:

• Balustrades on insulated or clad walls where the exact wall-to-glass distance falls between 35 and 48 mm
• Architectural glass façades and curtain wall point-fixed panels requiring on-site alignment
• Glass canopies, entrance awnings, and porte-cochères with deep substrate buildups
• Full-height glass partitions with pronounced shadow gap between substrate and panel
• Retrofit installations where wall dimensions and finish depths vary along the run
• Heavy-duty glazing with thick laminated glass up to 21.52 mm where both adjustability and angular tolerance are needed

FAQ:

What glass thickness does this adaptor support?

The D40 spherical adjustable 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 façades and heavy-duty balustrades.

What standoff range does the adjustable spacer cover?

The spacer is continuously adjustable from 35 mm to 48 mm. The installer sets the telescoping mechanism to the required depth on site, and the M10 inner thread provides additional fine-tuning within that range. This 13 mm adjustment window eliminates the need to stock multiple fixed-spacer variants for wall buildups in the 35–48 mm band.

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.

What size hole must be drilled in the glass?

A minimum Ø18 mm hole is required for the M12 screw. The adaptor uses a 17 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.

Can I install it myself?

Yes, with basic tools: a drill with the correct bit for your wall material, a torque wrench, an M12-rated wall anchor matched to the substrate, and pre-drilled glass. Set the telescoping spacer to the required depth, fine-tune with the threaded adjustment, then tighten the M12 × 150 mm screw. Thick laminated glass panels should be handled with two people to avoid cracking.

About adjustable glass adaptors

An adjustable glass adaptor is a stainless-steel point fixing with a variable spacer height that allows the wall-to-glass offset to be fine-tuned during installation. Unlike fixed-spacer adaptors, the adjustable design compensates for uneven substrates, insulation build-ups and alignment tolerances, reducing the need for shimming or rework on site.

Strofix supplies adjustable glass adaptors in three diameters — D35, D40 and D50 — in AISI 304 or AISI 316 stainless steel with a satin finish. Spacer adjustment ranges span from 20–25 mm up to 52–58 mm, and selected variants feature a spherical head with an inner thread for additional angular flexibility.

Choosing between variants depends on the required offset range, glass-panel size and whether the environment calls for AISI 316 corrosion resistance.