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UNIK GAUGES & TOOLS
UNIK GAUGES & TOOLS

BSPTr Thread Gauges

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BSPTr Thread Gauges



Specification
  • BS 21 - 1985 Indian Standard: Basic Dimensions: IS 554 : 1999 & Gauging Practice: IS 8999 : 2003.
Manufacturing Range :
  • aper Thread Plugs & Rings for Pipe sizes 1/16" to 6" in both System A & System B Design.
Diameter (Inch) TPI Type of Gauges
1/16, & 1/8 28 Thread Plug Gauges
System A.
& System B.		 Thread Ring Gauges Gauges
System A
& System B		 Check Plug to check
NEW Rings System A
& System B		 Wear Check
Plug Gauges to check/ calibrate used Rings. System A
& System B
1/4 & 3/8 19
1/2 & 3/4 14
1,1.1/4,1.1/2,2, 2.1/2, 3 11
4, 5, 6

For Internal Threads (Thread Plug Gauges)

two types are recommended.

L1 – To check effective diameter of thread to hand tightness at the gauge line (large end dia.)

L3 – To check effective dia. of remaining thread length
(small end dia.) and the taper cone.

 For External threads (Thread Ring Gauges)
two types are recommended.

L1 – To check effective diameter of thread to hand tightness at the gauge line (large end dia.)
L2 – To check effective dia. of remaining thread length(small end dia.) and the taper of cone.

Normally L2 rings and L3 plugs are used in addition to L1 gauges, where more stringent, examination is required. The use of L2 and L3 gauges is only effective when the designed full thread length in the work piece is one thread longer than the nominal thread length.