• Shoulder on retainer provides positive stop during installation.
  • Available in self-clinching, flaring, or floating mounting styles.
  • Available with knurled or un-knurled metal cap, black metal cap, or a custom color plastic cap.
Unit of Measure


Thread Size

N/A 0.250-20 (1/4-20)


N/A Knurled Cap - PF11

Thread Code

N/A 0420

Screw Length Code

N/A 0

A (Shank) Max.

N/A 0.036 in PF_PF11_12_dimension.jpg

Min. Sheet Thickness

N/A 0.036 in

Hole Size in Sheet + 0.003 - 0.000

N/A 0.375 in

C Max.

N/A 0.374 in

E ± 0.010

N/A 0.575 in

G ± 0.025

N/A 0.29 in

P ± 0.025

N/A 0 in

T1 Nom.

N/A 0.530 in

T2 Nom.

N/A 0.790 in

Driver Size

N/A Slotted/#3 Phillips

Min. Dist. Hole C/L to Edge

N/A 0.460 in

Standard Finish

N/A Knob - Natural Finish
Retainer - Bright nickel over copper flash per ASTM B689
Screw - Passivated and/or tested per ASTM A380
Spring - Natural Finish

CAD View

N/A Unfastened
Thread Specification1 N/A ANSI B1.1, 2A

Material Knob

N/A Aluminum

Material Retainer

N/A Heat-Treated Carbon Steel

Material Screw

N/A 400 Series Stainless Steel

Material Spring

N/A 300 Series Stainless Steel

Finish Knob

N/A Natural Finish

Finish Retainer

N/A Bright nickel over copper flash per ASTM B689

Finish Screw

N/A Passivated and/or tested per ASTM A380

Finish Spring

N/A Natural Finish

For Use in Sheet Hardness

N/A HRB 80 or Less (Hardness Rockwell “B” Scale) / HB 150 or Less (Hardness Brinell)

CAD Supplier

N/A PennEngineering® (PEM®)

On Hand

N/A {0}
  • 1 As with all external plated threads, Class 2A/6g, the maximum major and pitch, after plating, may equal basic sizes and be gauged to Class