Helicoil Tangless Insert

Heli-Coil Tangless® Inserts eliminate tang break-off and retrieval and are easily adjusted or removed after installation.

STRONGER ASSEMBLIES Tapped threads are strengthened because the inherent flexibility of the insert provides a more balanced distribution of static and dynamic loads throughout the engagement length. BI-DIRECTIONAL DESIGN Installs quickly and easily from either end. ELIMINATE STRESS Virtually no stress is induced into the parent material as no staking, swaging or keying in place is required. POSITIVE SELF LOCKING TORQUE Heli-Coil Tangless® screw-lock inserts provide a positive, self-locking torque complying with the requirements of NASM8846. MINIMIZE SPACE AND WEIGHT Requires smaller boss than solid inserts; minimize total in-place cost. CONFIRM TO NAS1130

Selecting a Heli-coil Tangless Insert

Heli-Coil Tangless® inserts are made from 304 Stainless Steel per AS7245 (see chart below for thread size designation), and are available in three lengths: 1,1-1/2 and diameters. Tangless® inserts can be ordered with a Cadmium Plate finish (Y), Dry Film Lube finish (W), Primer Free II finish (PF) or no finish (Blank). Below is an example of how to order Heli-Coil Tangles inserts.

Nominal Thread Size Type Size Designation "A" "B" Free Outer Dia. Number of Coils Nominal Length Free Running Screw- Lock 1 Dia. 1 1/2 Dia. 2 Dia. Min. Max. 1 Dia. 1 1/2 Dia. 2 Dia. Unified Coarse Thread(UNC) 2(.086)-56 T1185 T3585 02C .086 .129 .172 .110 .119 3 5-1/4 7-3/8 4(.112)-40 T1185 T3585 04C .112 .168 .224 .144 .159 2-3/4 4-3/4 6-3/4 6(.138)-32 T1185 T3585 06C .138 .207 .276 .178 .193 2-3/4 4-3/4 6-7/8 8(.164)-32 T1185 T3585 2C .164 .246 .328 .205 .220 3-1/2 6 8-3/8 10(.190)-24 T1185 T3585 3C .190 .285 .380 .244 .259 2-7/8 5 7-1/8 1/4(.250)-20 T1185 T3585 4C .250 .375 .500 .310 .330 3-3/8 5-3/4 8 Unified Fine Thread(UNF) 10(.190)-32 T1191 T3591 3C .190 .285 .380 .236 .256 4-1/8 6-7/8 9-1/2 1/4(.250)-28 T1191 T3591 4C .250 .375 .500 .326 .306 5 8-1/4 11-3/8