British Standard Thread Gaging · ISO/IEC 17025 · Made in USA
British Thread Ring Gages
Precision GO/NOGO Ring Gages for British Standard Threads
BSPP/BSPT, BSW, BSF, and BA thread ring gages across a full range of sizes and classes — machined to British Standard specifications and certified in our ISO environmentally controlled laboratory.
Request a QuoteISO/IEC 17025Accredited
ISO 9001Certified Quality Management
ANSI/NCSL Z540-1Accredited Calibration Lab
Made in USASince 1989
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.