Window Hardware Fittings: Materials, Finishes and What to Specify for Export

Window hardware sits in a different operating environment to door hardware. It is exposed to weather on at least one face, cycled thousands of times per year, and frequently installed in coastal, humid, or freeze-thaw conditions. The specification standards are therefore tighter on material, plating, and tolerance.

For B2B buyers — joinery suppliers, fenestration distributors, window fabricators, and builders merchants — the four product categories that matter are window stays, casement fasteners and handles, espagnolettes (multi-point rod locks), and friction hinges. Most window hardware ranges across the UK, Australia, and GCC markets are built from these four categories with finish variations.

The single line item in a window hardware purchase order that has the biggest impact on field performance is the material specification. A buyer who only specifies “brass” without naming the alloy is trusting the manufacturer to choose — and not all foundries pour the same metal.

For solid brass components — fasteners, stays, espagnolette handles — specify CZ121 (UK designation) or CW614N (European designation). These are free-cutting brass alloys with predictable machinability, finish acceptance, and corrosion resistance suitable for window applications across temperate and humid climates.

For aluminium components, specify 6063-T5 or T6 extrusion grade. This is the standard for window section profiles and matching hardware in the UK, Europe, Australia, and the Middle East. It takes powder coating cleanly and anodises predictably.

Casement stays — also called peg stays or telescopic stays — hold an opening sash at a defined angle. The standard lengths exported from India are 8″ (200mm), 10″ (250mm), 12″ (300mm), and 14″ (350mm) for solid brass peg stays. Multi-position variants typically have three or five locating pins.

When placing an RFQ, specify length, number of locking positions, whether the stay is straight-arm or articulated, the bracket configuration (face-fixed or rebate-fixed), and finish. For UK and Australian heritage joinery buyers, the most common request is 10″ or 12″ brass peg stays in polished or antique brass with matching keepers and stay pins.

Sliding telescopic stays for top-hung windows are typically supplied in 200–400mm extension lengths, with load ratings appropriate for sash weights up to roughly 20–30kg per pair depending on the geometry.

Casement fasteners are the most ordered item in the window hardware category. The standard formats are non-locking and locking fasteners (key-operated), available in left-hand and right-hand variants. For heritage joinery buyers, the bulb-end brass fastener remains the dominant style; for contemporary aluminium frame systems, low-profile lever handles are preferred.

The specification you should include in the RFQ: handle style (bulb, lever, mortice), handing (LH/RH/reversible), spindle length and section (typically 7mm or 8mm square), key-locking or non-locking, and finish. Most Indian manufacturers stock or produce both standard and oversized variants for export markets with different frame thicknesses.

Espagnolettes — the long vertical rods that engage multiple locking points on a tall casement or French window — are a higher value-per-piece product category. Standard rod lengths supplied from India range from 1,200mm to 2,400mm, with cranked or straight handles. The handle is typically brass with a steel or zinc internal rod mechanism.

When specifying, name the overall length, handle projection, the number and location of locking points, the rod material (zinc plated steel is standard; stainless is available for coastal), and the keep/striker plate configuration. For French door espagnolettes, top and bottom strike plates should be included in the SKU.

Friction hinges (also called friction stays) carry the full sash weight and allow controlled opening through a defined arc. They are arguably the most demanding window hardware item from a specification standpoint — undersizing causes sash sag, oversizing is wasted cost.

Standard sizes supplied from India are 8″, 10″, 12″, 14″, 16″, 20″, and 24″ lengths, with load ratings ranging from 12kg (8″ pair) up to 40kg (24″ pair). The arms are typically SS304 stainless steel with zinc alloy carriers; SS316 is available for coastal Australian and UAE specifications.

In your RFQ, specify hinge length, sash weight per leaf, opening angle requirement (egress hinges for fire escape compliance need 90° opening), stainless grade, and whether the hinge is side-hung or top-hung. For UK buyers, conformance to BS 6375 and PAS 24 specifications may also need to be confirmed.

Finish selection on window hardware is not a cosmetic decision — it determines warranty exposure. A lacquered brass fastener on a coastal cottage in Cornwall will pit within 18 months; the same fastener PVD-coated in antique brass over a chrome underlay will outlast the joinery.

For inland and temperate climates, the standard options are polished brass (lacquered), antique brass, polished chrome, satin chrome, brushed nickel, and matte black powder coat. For coastal Australia, the UK south coast, GCC littoral installations, and any salt-laden environment, specify PVD coatings or stainless substrate options.

Powder coating is the standard finish for aluminium window hardware. The coating thickness for export-grade fittings should be 60–80 microns minimum, with Qualicoat or equivalent process control where the destination market requires it.

Window hardware needs more protective packing than door hardware because the finishes are more vulnerable and the components are often paired. Standard export packaging from Aligarh is individual poly bag with branded sticker or printed insert, then inner cartons of 10 or 25 pieces, then 5-ply export cartons of 100–500 pieces per master, palletised for sea freight via JNPT Mumbai.

For builders merchant or trade counter distribution, retail blister packs or printed boxes with hanging tabs can be specified from MOQ. Private label buyers can request full custom artwork, multi-language printed inserts, EAN barcodes, and country-of-origin marking on the carton.