TT Miniature and Close-To-Edge

Inch

Also Available 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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Loading Parts

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)
080 .434-.439 (3) – – – – –
Thread Code Length Code / Length
.437 .500 .562 .625 .687 .750
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.