PennEngineering
PennEngineering
Corporate Headquarters – Danboro, PA
5190 Old Easton Rd.
Danboro, PA 18916
Phone: 215-766-8853
Toll-Free Phone: 1-800-237-4736 (U.S. only)
Email: info@pemnet.com
Website: www.pemnet.com
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Features a spring-driven automatic locking mechanism with a special beveled guide that provides secure positioning with simple push-pull operation.

Automatic locking mechanism for limited access application.

The PFAP™ panel fastener excels in applications requiring frequent access with limited clearance, which makes it ideal for compact equipment designs. The automatic locking mechanism eliminates the risk of accidental disengagement while the spring ompliance enhances vibration resistance – ensuring reliable performance in dynamic environments.

The slender design of the PFAP™ plunger saves valuable space in compact assemblies, and the effortless one-hand operation reduces service time and improves ergonomics for technicians working in areas with limited access.
  • Automatic Lock Design
    Spring-driven mechanism with beveled guide plunger provides secure engagement without manual locking steps
  • One-Hand Operation
    Simple push-pull action enables rapid installation and removal even in areas with limited access
  • Miniaturized Profile
    Compact design maximizes space efficiency while maintaining full functionality
  • Custom Colors
    Available with customizable plastic knobs for product identification and enhanced aesthetics
  • Self Clinching Installation
    Permanent installation creates strong, integrated attachment points using standard arbor press
Unit of Measure

Specifications

Plunger Dia. Code

 N/A 3.5

Plunger Length Code

 N/A 3

A (Shank) Max.

 N/A .059 in1.5 mm PFAP-PEM-Self-Clinching-Auto-lock-Plunger-Assembly_2.jpg

Min. Sheet Thickness

 N/A .059 in1.5 mm
Hole Size in Sheet +.003" - .000"/+0.08mm1 N/A .268 in6.8 mm
Hole Size in Mating Panel +.004" / +0.1mm2 N/A .146 in3.7 mm

C Max.

 N/A .267 in6.78 mm

D Pin Dia. ±.003" / ±0.08mm

 N/A .138 in3.5 mm

E ± .010"/± .25mm

 N/A .236 in6 mm

G ± .025"/± .64mm

 N/A .118 in3 mm

H Nom.

 N/A .236 in6 mm

T1 Nom.

 N/A .598 in15.2 mm

T2 Nom.

 N/A .717 in18.2 mm
Min. Dist. Hole C/L to Edge3 N/A .250 in6.35 mm

Test Sheet Material

 N/A .060” / 1.5mm Cold-rolled Steel

Fastener Materials - Retainer&Pin

 N/A Hardened Carbon Steel
Fastener Materials - Cap4 N/A PC (UL 94V-0, Halogen Free)

Fastener Materials - Spring

 N/A 300 Series Stainless Steel
Standard Finish - Retainer & Pin5 N/A Zinc plated per ASTM B633, SC1 (5ųm), Type III, Colorless

Standard Finish - Cap

 N/A Pantone 429C (Grey)

Standard Finish - Spring

 N/A Natural Finish
For Use in Sheet Hardness6 N/A Retainer - HRB 80 / HB 150 or less
Installation Load7 N/A 3372 lbs15000 N

Retainer Pushout

 N/A 292 lbs1300 N
  • 1 The mounting hole is D-shaped to ensure correct orientation of the plunger during installation.
  • 2 The hole in the mating panel is round, with a diameter of .146" / 3.7mm.
  • 3 For more information on proximity to bends and distance to other clinch hardware, see PEM® Tech Sheet C/L To Edge.
  • 4 Temperature Limit: 210° F (99° C). Additional cap colors available on special order.
  • 5 See PEM Technical Support section of our web site for related plating standards and specifications.
  • 6 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.
  • 7 Published installation forces are for general reference. Actual set-up and confirmation of complete installation should be made by observing proper seating of fastener as described in the installation steps. Other performance values reported are averages when all proper installation parameters and procedures are followed. Variations in mounting hole size, sheet material, and installation procedure may affect performance. Performance testing this product in your application is recommended. We will be happy to provide technical assistance and/or samples for this purpose.