Buttress Thread Gauges

Buttress Thread Gauges

BUTTRESS THREADS are used in the construction of artillery with the screw type breech block / gun barrels OR vices & screw jack. As Buttress Threads can withstand the axial load placed on it OR high force only in one direction, these are suitable for above applications.

Specification:

American Specifications : ANSI/ ASME B1.9 : 1973 for 7o/45o thread Profile.
B.S Specifications : B.S 1657 : 1950 used for 7o/45o and 0/52o thread profile.
DIN Specifications : Basic Dimensions : DIN 513 : 1985, IS 4696 : 2004
Gauging Practice : DIN 103 - 9 : 1985.

Manufacturing Range :

Thread Plugs , Thread Rings, Check Plugs & Wear Check Plugs of Diameter from 1/2" to 14" and TPI from 20 to 2.

Gauge Type Diameter Range (Inch) TPI (Threads per Inch) Tolerance
Class as per BS 1657
Tolerance
Class as per ANSI B1.9
Tolerance
Class as per DIN
Thread Plug Gauges. 0.5 - 12 20, 16, 12, 10, 8, 6, 5, 4, 3
TPI not covered
here can be supplied
if requested by customer
Free
Medium
Close
Class 2 (standard grade)
Class 3 (precision grade)
7H
Thread Ring Gauges. 0.5 -10.2 7e
Check Plug Gauges. 0.5 -12 7e
Wear Check Plug Gauges. 0.5 -12 7e

Buttress with Hydraulic sealing thread form used in Oil fields is not considered here.