Part # F-256-1, PEMSERT® Self-Clinching Flush Fasteners - Type F

PEMSERT self-clinching flush nuts are designed to be completely flush in sheets as thin as .060”.

These fasteners are ideal for applications where a thin sheet requires load-bearing threads but still must remain smooth, with no protrusions on either surface. The PEM flush nut can be installed easily by squeezing it into a round hole in metal sheets. When the fastener is installed, both the top and the bottom of the sheet remain smooth, enhancing the functional and cosmetic qualities of the entire assembly. PEMSERT self-clinching flush nuts can be installed in metal sheets before bending and forming. This can provide strong threads in places which would be inaccessible for installation after chassis are formed.

The hexagonal head along with the proven PEM self-clinching design ensures high axial and torsional strength and PEMSERT Type F fasteners can be ordered to conform to US NASM45938/4 specifications.

Unit of Measure

Specifications

Thread Size	N/A .086-56 (#2-56)
Thread Code	N/A 256
Shank Code¹	N/A 1
A (Shank) Max.	N/A .060 in
Sheet Thickness	N/A .060 to .091 in
Hole Size in Sheet + .003 - .000	N/A .172 in
C Max.	N/A .171 in
H Nom.	N/A .188 in
Min. Dist. Hole C/L to Edge²	N/A .23 in
For Use in Sheet Hardness³	N/A HRB 70 / HB 125 or Less
Thread Specification	N/A Internal, ASME 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®)
Inventory	N/A {0}

¹ Other shank and screw lengths available.
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.

Specifications

Thread Size

Thread Code

A (Shank) Max.

Sheet Thickness

Hole Size in Sheet + .003 - .000

C Max.

H Nom.

Thread Specification

Fastener Material

Standard Finish

CAD Supplier

Inventory