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 All Categories    Large knob, spring-loaded – Types PF11, PF12 and PF15 - Unified
PennEngineering
All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Captive Panel Screws and Hardware > Large Knob, Spring-Loaded – Types PF11, PF11M, PF11MF, PF11MW, PF12, PF12M, PF12MF, PEM C.A.P.S®, PF12MW, PF15, PF15M > Large Knob, Spring-Loaded – Types PF11, PF12 and PF15 > Large knob, spring-loaded – Types PF11, PF12 and PF15 - Unified > Part # PF11-0420-0BL  

Part # PF11-0420-0BL, Large knob, spring-loaded – Types PF11 and PF12 - Unified


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  • 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.





 Specifications   

Thread Size

.250-20 (1/4-20)

Type

Knurled Cap - PF11

Thread Code

0420

Screw Length Code

0

A (Shank) Max.

View
.036 in

Min. Sheet Thickness

.036 in

Hole Size in Sheet + 0.003 - 0.000

.375 in

C Max.

.374 in

E ± .010

.575 in

G ± .025

.290 in

P ± .025

.000 in

T1 Nom.

.530 in

T2 Nom.

.790 in

Driver Size

Slotted/#3 Phillips

Min. Dist. Hole C/L to Edge

.460 in

Standard Finish

Knob - Black Anodize
Retainer - Bright nickel over copper flash per ASTM B689
Screw - Black nitride, AMS2753, Section 3
Spring - Natural Finish

CAD View

Unfastened

Thread Specification1

ANSI B1.1, 2A

Material Knob

Aluminum

Material Retainer

Heat-Treated Carbon Steel

Material Screw

400 Series Stainless Steel

Material Spring

300 Series Stainless Steel

Finish Knob

Natural Finish

Finish Retainer

Bright Nickel over Copper Flash per ASTM B689

Finish Screw

Passivated and/or tested per ASTM A380

Finish Spring

Natural Finish

For Use in Sheet Hardness

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

Optional Finish2

Knob (aluminum) – Black Anodize
Screw (steel and stainless) – Black Nitride

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
2 “BL” suffix will be added to part number to designate DuraBlack™ finish.



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PEM Bulletin PF

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