Metal square washer RB-Q Bossong

What it is

The Bossong RB-Q is a square metal washer in zinc-plated steel, 70 x 70 mm, domed with a central countersink. The countersink accommodates the head of the fastener, while the large surface spreads the tightening load over a much wider area than the head of a screw or nail. The same Bossong family includes the round version (RB) and the oval one (RB-O).

What it is for

Used for powder-actuated fastening into concrete and steel and for mechanical fixing of structures and components to walls, ceilings and floors.

How to use it

Choose an inner diameter matching the screw or threaded rod and a compatible material (zinc-plated, stainless steel, plastic). Place flat washers and penny washers under the nut to avoid damaging the substrate and to spread the pressure; place the spring washer under the nut, where it is flattened on tightening to resist vibration loosening. Use seismic washers only with the anchor they are certified for.

Where it is used

• Commercial construction
• Industrial construction
• Residential construction

Technical data

• Material: Galvanised steel
• Shape and dimensions: 70×70 mm square, domed with central countersink

Who it is for

Designed for formwork carpenters, insulation installers, waterproofing specialists and construction workers.

Related products

• Diamond washer RR for wood screws Bossong
• Metal flat washer R Bossong
• Stainless steel A2 nut for construction Bossong — from the category Hex Nuts
• Threaded rod with nut and washer, 4.8, Bossong — from the category Threaded Rods
• Hex bolts TED 6x100 — from the category Bolts and Metric Screws
• Browse the whole category: Flat Washers

Before you order

Tell us the quantities you need and the intended use: if there is a more suitable version, or an equivalent available sooner, we will let you know.

For prices and availability, request a quote from AMES Srl: we will reply with our quotation, delivery times and, where needed, an equivalent technical alternative.