P-F FLUSH SELF-CLINCHING NUTS have been designed to provide a thread within the sheet thickness giving a flush finish to both sides.
A simple squeezing action embeds the hexagonal head into the sheet and the displaced metal flows evenly around the undercut shank securely locking it into place.
Advantages
- Allows captive nuts to be used in panels where lack of space prevents the use of conventional captive fasteners
- Easily assembled into round holes
- High pull out
- High torque resistance
- Provides flush finish to both sides of the sheet
Design Guide
Hole Size in Sheet
Holes must be held to a tolerance of -.000” +.003” (-0.00mm +0.08mm) Therefore punched holes are recommended. Holes must not be de-burred or chamfered.
Installation
Must always be carried out using a squeeze action – NEVER a shock load.
Sheet Hardness
Must be less than 70RB (128VPN).
Sheet Thickness
See dimensions table.
Shank Number
Always use the longest shank possible for the sheet thickness. This will optimize the stripping strength and resistance to side loads.
Direction of Load
P-F fasteners should always be loaded from the pilot end. See maximum screw tightening torque to prevent overloading of head or thread.
Technical Data
P-F Type (Metric)
MATERIAL CODES
P-F – Stainless Steel
MAXIMUM SHEET HARDNESS
P-F = Rb 70
Metric
All dimensions in millimetres.
How to Specify
Technical Data
P-F Type (Unified)
MATERIAL CODES
P-F – Stainless Steel
MAXIMUM SHEET HARDNESS
P-F = Rb70
Unified
How to Specify
Methods of Assembly
P-F SELF-CLINCHING NUTS are easy to install because no special tooling is necessary. However, it is very important to note they must always be installed by a squeeze action press rather than a hammer blow. Punched holes are always recommended.
- Punch a hole in the metal sheet to the size recommended in our technical data table. De-burring of the hole is not recommended.
- Insert the shank of the fastener into the hole.
- Apply squeezing pressure sufficient to embed hexagonal head flush in sheet.
Performance Data
Metric
Unified
Note: The above values are averages when correct installation is performed. Variations in hole size, material and installation will affect these results. For specific advice we strongly recommend consultation with your PSM Technology Centre.
There are no reviews yet.