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AN51/55 5mm Aluminium Stair Nosing

Product Description

The AN51/55 is a 5mm gauge, square-edged, single-channel aluminium stair nosing available with a variety of infill options and colours such as castellated PVC or aluminium ATI's. The body of this nosing is available in bronze, light bronze, mill aluminium, satin aluminium, polished aluminium and black anodised, and can be ordered to measure.

The AN51/55 has an interlocking back edge designed to accommodate a ramp extension code ANRE25, a tread extender code ANEXT or an ANE Nap Detail for use with broadloom carpets.


This profile has a 62mm tread a 55mm square riser and is ideal for use with carpet, carpet tiles and all resilient floor coverings. These stair nosings can be supplied drilled retrofit for hidden fixing, with castellated PVC insert or with ATI49.5 for a full aluminium concealed fixing installation.

Available Finishes:

  • Bronze - NEW

  • Light Bronze - NEW

  • Mill Aluminium

  • Satin Aluminium

  • Polished Aluminium

  • Black Anodised Aluminium

Size Options​: Cut-to-size

Max Lengths

  • Bronze                         2.75m

  • Light Bronze                2.75m

  • Mill Alu                         3.2m

  • Satin Alu                      3.2m

  • Polished Alu                3.2m

  • Black Anodised Alu    2.7m

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Infill Options:

  • PVC Castellated

  • Smooth Textured

  • ATI49.5 Insert

  • Olympic Grip

Drilling Options​ PVC Infill:

  • Drilled retro

  • Drilled for countersunk screws

  • Drilled for concealing plugs 

  • Undrilled 

Drilling Options​ ATI & Olympic:

  • Drilled retrofit infill

  • Undrilled​

Screw size 8.


Fixings not supplied.

Drilling is available - 5% charge

CAT Castellated PVC Infill Colours

Stringer angles also available in Satin and Polished Aluminium.

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Aluminium Technical Data Sheets

AN51/55 Castellated Infill

Technical Data Sheet

AN51/55 ATI Infill

Technical Data Sheet

AN51/55 Smooth PVC Infill

Technical Data Sheet

AN51/55 Olympic Infill

Technical Data Sheet


Designer Collection Technical Data Sheets

AN51/55 DC Castellated Infill

Technical Data Sheet

AN51/55 DC ATI Infill

Technical Data Sheet

AN51/55 DC Smooth PVC Infill

Technical Data Sheet

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