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PennEngineering
All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Captive Panel Screws and Hardware > Low Profile Knob, Spring-loaded – Types PF30, PF31, PF32, PF50, PF60 > Low Profile Knob, Spring-loaded – Types PF50, PF60 > Captive Panel Screw-Low Profile Knob, Spring-loaded - Unified PF50/PF60 Series > Part # PF51-440-0CN  

Part # PF51-440-0CN, Captive Panel Screw-Low Profile Knob, Spring-loaded - Unified PF50/PF60 Series

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  • Low-profile design satisfies many functional and cosmetic requirements.
  • Type PF50 with convenient large head and Phillips recess for tool or finger operation.
  • Available with six-lobe recess.




 Specifications   

Thread Size
.112-40 (#4-40)

Type
Knurled Cap - PF51

Thread Code
440

Screw Length Code
0

A (Shank) Max.

 View
0.038 in

Min. Sheet Thickness
.040 in

Hole Size in Sheet + 0.003 - 0.000
.203 in

C Max.
.202 in

E ± .010
.406 in

G ± .025
.230 in

H ± .008
.207 in

P ± .025
.000 in

T1 Max.
.340 in

T2 Nom.
.520 in

Driver Size
#1 Phillips

Min. Dist. Hole C/L to Edge
.260 in

Thread Specification1
ANSI B1.1, 2A

Material Knob
Carbon Steel

Material Retainer
Carbon Steel

Material Screw
Carbon Steel

Material Spring
300 Series Stainless Steel

Finish Knob
Bright nickel over copper flash per ASTM B689

Finish Retainer
Bright Nickel over Copper Flash per ASTM B689

Finish Screw
Bright nickel over copper flash per ASTM B689

Finish Spring
Natural Finish

For Use in Sheet Hardness
HRB 60 or Less (Hardness Rockwell “B” Scale)
HB 107 or Less (Hardness Brinell)

CAD View
Fastened

CAD Supplier
PennEngineering® (PEM®)
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 3A/4h, per ANSI B1.1, Section 8, Table 3A and ANSI B1.13M, Section 8, Paragraph 8.2.


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