Catalog
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The thread locking torque performance of Type PL and PLC PEMHEX® self-clinching fasteners is equivalent to applicable NASM25027 specifications. A nylon hexagonal element provides a reusable, non-metallic prevailing torque thread lock. The strong knurled collar receives the installation force and resists torque. The spin resistance of the knurl greatly exceeds the torque that can be exerted by the self-locking feature. As the knurled collar is embedded in the sheet, the undercut cavity beneathmore the collar is filled with displaced sheet material, thereby captivating the fastener in the sheet.
The color blue for fastener locking elements is a registered trademark. Unified fasteners have a blue nylon locking element and metric fasteners have a black nylon locking element. less
The color blue for fastener locking elements is a registered trademark. Unified fasteners have a blue nylon locking element and metric fasteners have a black nylon locking element. less
Unit of Measure
Thread Size |
N/A .112-40 (#4-40) |
Thread Code |
N/A 440 |
Material Code |
N/A C |
A (Shank) Max. |
N/A .060 in |
Sheet Thickness1 | N/A .040 to .070 in |
Hole Size in Sheet + .003 - .000 |
N/A .234 in |
C Max. |
N/A
.233 in
![]() Loading zoom |
D Max. |
N/A .215 in |
E Max. |
N/A .274 in |
T Max. |
N/A .130 in |
Min. Dist. Hole C/L to Edge |
N/A .170 in |
Max. Hole in Attached Parts |
N/A .132 in |
Fastener Materials - Locking Element |
N/A Blue Nylon |
For Use in Sheet Hardness2 | N/A HRB 70 / HB 125 or Less |
Thread Specification |
N/A Internal, ANSI B1.1, 2B |
Fastener Material |
N/A 300 Series Stainless Steel |
Standard Finish |
N/A Passivated and/or tested per ASTM A380 |
CAD Supplier |
N/A PennEngineering® (PEM®) |
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1 - Can be used in panel thickness of .040” to .060” / 1 mm to 1.53 mm provided the fastener is not fully installed. The knurled collar must be
left protruding above the sheet to the degree that the sheet thickness is less than .060” / 1.53 mm.
- Knurled collar may fracture if fastener is used in sheets thicker than .070” / 1.78 mm and screw is tightened beyond maximum tightening torque. - 2 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.