New A7 ultrasonic reference block in carbon steel, made in the UK to BS 2704 and sold by an NDT supplier based at Shoreham Airport in West Sussex. The A7 is used to check how well shear-wave angle probes separate closely spaced reflectors. This block has steps of 2, 3, 4 and 5 mm machined to ±0.1 mm, and the listing offers hole patterns of either three 1.3 mm or five 1.5 mm holes. A manufacturer's certificate of conformance is supplied with it. Stainless steel and aluminium versions are quoted on request, and the page does not state whether the price includes VAT.

Key details

• A7 resolution block to BS 2704
• Carbon steel, UK-made
• Steps 2, 3, 4 and 5 mm, ±0.1 mm
• Hole options: 3 x 1.3 mm or 5 x 1.5 mm

What is included

• A7 block
• Manufacturer's certificate of conformance

Buying this item

Offered by SMG NDT Ltd, Shoreham-by-Sea, United Kingdom. Asking price: GBP 330 (VAT treatment not stated).

Checked as available on 14 September 2026. Stock, prices and terms change, so confirm with the seller before you commit. See the seller’s own listing.