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Unified Fine Tangless Inserts

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Tangless threaded inserts provide many advantages over tanged inserts.

They eliminate the need for tang break off and tang retrieval and allow for non-destructive insert removal. Tangless inserts are easily adjusted and easily removed after installation.

Inch and metric size inserts are available in stainless steel and gall resistant (or Nitronic 60) materials. Finish options include Primer Free II, Dry Film Lube (and Cadmium when required by Mil. Spec.)

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Item #

Nominal Thread Size


Size Designation

1 Diameter A Nominal Length

Minimum Free Outside Diameter

Maximum Free Outside Diameter

T3591-3C 10 in (.190)-32 Screw-Locking 3C .190 in .236 in .256 in
T3591-4C 1/4 in (.250)-28 Screw-Locking 4C .250 in .326 in .306 in
T1191-3C 10 in (.190)-32 Free Running 3C .190 in .236 in .256 in
T1191-4C 1/4 in (.250)-28 Free Running 4C .250 in .326 in .306 in
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