ring gauge
1907
Thread gauge by Holtzapffel
Sample thread gauge
circa 1917-1919
Steel thread gauge for American 60 degree threads.
N. K.
Setting gauge for thread cutting tools
1857-1948
International Thread measuring machine
Taper Thread Gauge checking machine
Taper Thread Gauge checking machine
Taper Thread gauge checking machine
Taper Thread Gauge checking machine
Sample thread gauge
circa 1917-1919
Steel centre gauge
O-VEE Spring Thread Gauges
1946 or later.
O-VEE Spring Thread Gauge
1946 or later.
29 degree screw thread gauge
1857-1948
Steel thread gauge
N. K.
Taper thread Gauge checking machine
Taper Thread Gauge Checking machine
Taper Thread Gauge checking machine
Steel centre gauge
ring gauge
1969
Three O-VEE Spring Thread Gauges.
1946 or later.
Five thread gauges
Taper Thread Gauge checking machine
circa 1934
Fold away 'System International' thread gauges
Standard handles nos. 0-6
O-VEE Spring Thread Gauge, 9B.A.
1946 or later.
Standard screw thread gauge for 2 1/4 to 20 t.p.i.
N. K.
Thread gauges
Adapter for screw thread measurement, for Sigma Instruments thickness gauge
1951