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PEM® PreTect™ Thread Masking Plugs reduce labor and protect threads from paint and powder coating processes. PreTect™ Thread Masking Plugs are available for standard type self-clinching nuts in variety of thread sizes and materials.
Features include:
- Fasteners are shipped with plugs already in place.
- Plugs easily removed by end user with fine tip tool.
- Plugs can withstand 482°F/250°C temperatures
Unit of Measure
Thread Size |
N/A .250-20 (1/4-20) |
Thread Code |
N/A 0420 |
Shank Code |
N/A 0 |
A (Shank) Max. |
N/A
.045 in
Loading zoom |
Plug Material |
N/A Black Silicone Rubber |
High Temperature Resistant |
N/A 482 ºF250 ºC |
Plug Hardness |
N/A Shore a 70 |
Rec. Min. Sheet Thickness1 | N/A .047 in |
Hole Size in Sheet + .003 - .000 |
N/A .344 in |
C Max. |
N/A .343 in |
E ± .010 |
N/A .440 in |
T ± .010 |
N/A .170 in |
PD |
N/A 0.216 in |
PL |
N/A 0.0764 in |
Min. Dist. Hole C/L to Edge2 | N/A .34 in |
For Use in Sheet Hardness3 | N/A HRB 80 / HB 150 or less |
Thread Specification |
N/A Internal, ASME B1.1, 2B |
Fastener Material |
N/A Heat-Treated Carbon Steel |
Standard Finish |
N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless |
CAD Supplier |
N/A PennEngineering® (PEM®) |
- 1 For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
- 2 To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.
- 3 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.