Installation Instructions for TK, TM and TN Self-clinching Standoffs


TK, TM and TN self-clinching standoffs provide internal threads and spacing for thin metallic sheets. Pressing the standoffs into punched or drilled holes of ductile metal sheets displaces the host material into the engineered recesses of the standoffs and prevents the fasteners from rotating and removal. Following the instructions below results in a consistent and robust installation:

  1. Punch or drill hole in sheet. Do not deburr edges. See table below for sheet hardness recommendations.
  2. Insert standoff through hole in sheet and into the anvil as shown in the diagram below.
  3. Squeeze the sheet and standoff head between parallel punch and anvil surfaces. Using the installation loads in the table on page 2 as a guide, use only enough pressure to seat the standoff head flush with the sheet. Punch and anvil should be made from hardened tool steel.
Standoff
Material
Code
Material
Description
For Use in Sheet Hardness
HRB 50
Max.
HRB 70
Max.
HRB 80
Max.
HRB 88
Max.
STHeat-treated Carbon Steel
SS300-Series Stainless Steel
ALAluminum
S4400-Series Heat-treated Stainless Steel
TK, TM, and TN standoff install diagram.

Inch

Standoff
“C”
Nom.
Dimension
Sheet Material
.060″
5052-H34
Aluminum
(lbs)1
.060″
Cold-rolled
Steel
(lbs)2
.050″
300-Series
Stainless
Steel
(lbs)3
.165110022005500
.212170033009500
.2802400400010500

Metric

Standoff
“C”
Nom.
Dimension
Sheet Material
1.50mm
5052-H34
Aluminum
(kN)1
1.50mm
Cold-rolled
Steel
(kN)2
1.30mm
300-Series
Stainless
Steel
(kN)3
4.204.9
9.8
24.5
5.39
7.6
14.742.3
7.12
10.7
17.8
46.7
  1. Installation loads apply to ST, SS and AL stud material codes.
  2. Installation loads apply to ST and SS stud material codes. Studs with AL material code not recommended for installation in carbon steel sheets.
  3. Installation loads apply to S4 stud material code. Studs with ST, SS and AL material codes not recommended for installation in stainless steel sheets.
  4. Installation data represents average results for standoffs only when all installation specifications are strictly followed. Variations in panel hole size, thickness, material and installation methods will affect the loads. Pencom strongly encourages testing in the application.
  5. Refer to the latest Pencom TK, TM and TN standoff fliers for C dimensions.
Filed under: Technical Bulletins