ALL GAUGES manufactured to BS 919 Parts 1, 2 and 3 unless otherwise stated or requested. Please state whether Part 2 gauges are required to General or Reference Limits.

All Plug & Ring Gauge Blanks
made to BS 1044.

ALL GAUGES supplied right hand thread unless otherwise stated or requested.
SCREW PLUG GAUGES: State whether Style 'A', 'D', 'E', 'F', 'G', 'H' or Single end "GO" plugs are required.

ISO Metric (course pitch)
To BS 3643 parts 2&3 Tolerances to
BS 919/68
Style "E" Screw Plugs to Class 6H
Screw Rings to 6g

ISO Metric (fine pitch)

UNC and UNF
To BS 1580:1962 and BS919 part 1
Style "E" Screw Plugs to Class 2B
Screw Rings to 2A

BSP-G (formerly BSPF)
To BS 2779 and BS 919 Part 2
Style "E" Screw Plugs to Class A Medium Fit
Screw Rings - Medium Fit

BA
To BS 93:1951and BS919 part 2
Screw rings and Style "A" Setting Plugs
to normal u/p Class only
Adjustable Screw Calipers all Classes

BSW and BSF
To BS 84:1956 and BS919 part 2
Style "E" Screw Plugs to Medium Fit
Screw Rings to Medium Fit u/p.