British Thread Ring Gages v2
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Published
2026/03/05
About
The ring-gage half of the British thread line — inspecting external BSPP/BSPT, BSW, BSF, and BA threads to the governing British Standards (BS 21, BS 84, BS 93). GO and NO GO members across a full range of sizes and classes, certified in our ISO/IEC 17025 accredited laboratory.