BS 1790 61st Edition, January 31, 1961
Specification for Length bars and their accessories — (Imperial Units)
Includes all amendments and changes through Reaffirmation Notice , July 1, 2014
Additional Comments: INCLUDES AMENDMENT 1
Published By:British Standards Institution (BSI)
Length gauges of cylindrical bar type in four grades of accuracy; reference, calibration, inspection, workshop. Accuracy for sizes up to 48 in and metric sizes up to 1200 mm in all grades; two types of screwed connection, one a refined type developed by NPL for inspection bars. Design and accuracy for accessories used with workshop bars. Sets of inspection and workshop bars.