TT Self-Clinching Standoffs

Inch

Also Avaliable in Metric

Features

  • Precisely stack mating panels in limited space and close-to-edge applications.
  • Self-clinching design provides simple, permanent installation in aluminum, carbon steel and stainless steel sheets.
  • Custom sizes available by request.
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Part Desc.ThreadLength (L)MaterialFinishMin. Sheet ThicknessHole Size in SheetMin. Dist. Hole C/L to EdgeFor Use in Sheet HardnessType

General

Thread

Thread Code

Sheet

C

Max.

D

Min.

H

Nom.

Minimum Thickness

Hole Size

Minimum Distance Hole Center to Edge

0-80 (1)

080

.012

.095-.097

.090

.094

.125

.125

2-56 (1)

256

.012

.125-.127

.120

.124

.200

.156

4256

.037

.166-.169

.126

.165

.194

4-40 (1)

440

.037

.166-.169

.126

.165

.220

.194

(1) Unified threads per ASME B1.1, 2B.

Length

Thread Code

Length Code / Length

.094

.125

.187

.250

.275

.312

.375

080

.091-.096 (1)

.122 -.127 (1)

.184-.189 (1)

.247-.252 (2)

.272-.277 (2)

.309-.314 (2)

.372-.377 (3)

256

.091-.096 (1)

.122 -.127 (1)

.184-.189 (1)

.247-.252 (1)

.272-.277 (2)

.309-.314 (2)

.372-.377 (2)

4256

.089 -.096 (1)

.120 -.127 (1)

.182-.189 (1)

.245-.252 (1)

.270-.277 (2)

.307-.314 (2)

.370-.377 (2)

440

.089 -.096 (1)

.120 -.127 (1)

.182-.189 (1)

.245-.252 (1)

.270-.277 (1)

.307-.314 (2)

.370-.377 (2)

Thread Code

Length Code / Length

.437

.500

.562

.625

.687

.750

080

.434-.439 (3)

256

.434-.439 (3)

.497-.502 (3)

.559-.564 (3)

.622-.627 (3)

4256

.432-.439 (3)

.495-.502 (3)

.557-.564 (3)

.620-.627 (3)

.682-.689 (3)

.745-.752 (3)

440

.432-.439 (2)

.495-.502 (3)

.557-.564 (3)

.620-.627 (3)

.682-.689 (3)

.745-.752 (3)

(1) Type 1 (2) Type 2 (3) Type 3

Material & Finish

Material Code

Material Description

Finish Code

Finish Description

For Use in Sheet Hardness

HRB 70

Max.

HRB 80

Max.

HRB 88

Max.

ST (1)

Heat Treated

1215 Carbon Steel

Z

Zinc (SC1) with Type III Clear Chromate per ASTM B633

SS

300-Series Stainless Steel

P

Passivated and/or

Tested per ASTM A967

S4 (2)

Heat Treated 400-Series

Stainless Steel

P

Passivated and/or

Tested per ASTM A967

(1)ST material code not available for maximum standoff body diameters .094” (2.39mm) and .124” (3.16mm).
(2)S4 material code not available for maximum standoff body diameter .165” (4.20mm).

Installation

  1. Prepare correct sized mounting hole in sheet. Do not deburr edges.
  2. Insert standoff through hole in punch side of the sheet and into the anvil as shown.
  3. Squeeze the sheet and standoff head between parallel anvil and punch surfaces. Use only enough pressure to seat the standoff head flush with the sheet.
  4. Anvil with countersink is required for standoff with maximum body diameters.
  5. For installation in stainless steel, the sheet should be annealed and avoid standoff installation next to bends or other highly cold-worked areas. The hole punch diameter should be no greater than .001” (0.025mm) over the minimum recommend- ed mounting hole diameter and kept sharp to minimize work hardening around the hole.

Anvil and Punch Dimensions

Standoff C Max.

Dimension

A

B

Anvil Part Number

Punch Part Number

.094

.112-.114

.097-.099

TL1268

TL1287

.124

.142-.144

.127-.129

TL1269

TL1287

.165

.169-.172

TL1087

TL1287

Performance

Thread Code

Stand. Matl. Code

Test Sheet Thick- ness

Test Sheet Material

5052-H34 Aluminum

Cold-rolled Steel

300-Series Stainless Steel

Installation (lbs)

Push-out (lbs)

Torque- out

(in-lbs) (2)

Pull- thru (lbs) (2)

Installation (lbs)

Push-out (lbs)

Torque- out

(in-lbs) (2)

Pull- thru (lbs) (2)

Installation (lbs)

Push-out (lbs)

Torque- out

(in-lbs) (2)

Pull- thru (lbs) (2)

080

SS

.013

900

20

1.2

40

(3)

(3)

(3)

(3)

.017

600

20

1.2

40

1000

35

1.6

74

(3)

(3)

(3)

(3)

S4

.013

2500

33

1.3

78

.017

2500

45

2.2

78

256

SS

.013

1000

25

2.0

45

(3)

(3)

(3)

(3)

.017

700

25

2.0

45

1100

40

2.5

85

(3)

(3)

(3)

(3)

S4

.013

2500

33

2.2

110

.017

2500

45

2.6

110

4256

440

ST

.040

700

50

10

320

1100

75

10

357

(3)

(3)

(3)

(3)

SS

.040

700

50

10

320

1100

75

10

357

(3)

(3)

(3)

(3)

(1) Performance data represents the average result when all installation specifications are strictly followed. Variations in panel hole size, thickness, material and installation method will affect the loads. PENCOM strongly encourages testing in the application.
(2) Torque-out and pull-thru performance may vary depending on the strength and type of screw being used.
(3) Not recommended.