Hi-Tech Fasteners Inc.
Hi-Tech Fasteners, Inc.
4940 Winchester Boulevard
Frederick, Maryland 21703-7400

Toll Free: 800.466.1940
Tel: 301.831.1277
Fax: 301.831.8296
Email: sales@hitechfasteners.com
Website: www.hitechfasteners.com
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  • Appropriate for close centerline-to-edge applications.
  • Doesn’t require high installation force.
  • Installs into any panel hardness.
  • Installs flush on back side of panel.
Large knob, spring-loaded –Types PF11MF and PF12MF
Large knob, spring-loaded – Types PF11MF and PF12MF 2
Unit of Measure
Items Large knob, spring-loaded –Types PF11MF and PF12MF
PF11MF-440-0
Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified 		Large knob, spring-loaded –Types PF11MF and PF12MF
PF11MF-440-1
Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified 		Large knob, spring-loaded –Types PF11MF and PF12MF
PF11MF-440-2
Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified 		Large knob, spring-loaded –Types PF11MF and PF12MF
PF11MF-632-0
Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified 		Large knob, spring-loaded –Types PF11MF and PF12MF
PF11MF-632-1
Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified
Thread Size N/A .112-40 (#4-40) N/A .112-40 (#4-40) N/A .112-40 (#4-40) N/A .138-32 (#6-32) N/A .138-32 (#6-32)
Type N/A Knurled Cap - PF11MF
Thread Code N/A 440 N/A 440 N/A 440 N/A 632 N/A 632
Screw Length Code N/A 0 N/A 1 N/A 2 N/A 0 N/A 1
A Max. N/A .041 in a1101_1.jpg N/A .041 in a1101_1.jpg N/A .041 in a1101_1.jpg N/A .072 in a1101_1.jpg N/A .072 in a1101_1.jpg
Min. Sheet Thickness N/A .031 in N/A .031 in N/A .031 in N/A .060 in N/A .060 in
Hole Size in Sheet + 0.005 - 0.000 N/A .187 in N/A .187 in N/A .187 in N/A .213 in N/A .213 in
C Max. N/A .186 in N/A .186 in N/A .186 in N/A .212 in N/A .212 in
E ± .010 N/A .417 in N/A .417 in N/A .417 in N/A .450 in N/A .450 in
G ± .025 N/A .170 in N/A .230 in N/A .290 in N/A .230 in N/A .290 in
P ± .025 N/A .000 in N/A .055 in N/A .115 in N/A .000 in N/A .024 in
T1 Nom. N/A .310 in N/A .310 in N/A .310 in N/A .450 in N/A .450 in
T2 Nom. N/A .450 in N/A .450 in N/A .450 in N/A .640 in N/A .640 in
Driver Size N/A Slotted/#1 Phillips a1102_1.jpg N/A Slotted/#1 Phillips a1102_1.jpg N/A Slotted/#1 Phillips a1102_1.jpg N/A Slotted/#2 Phillips a1102_1.jpg N/A Slotted/#2 Phillips a1102_1.jpg
Thread Specification1 N/A ANSI B1.1, 2A
Material Knob N/A Aluminum
Material Retainer N/A Aluminum
Material Screw N/A Heat-Treated Carbon Steel
Material Spring N/A 300 Series Stainless Steel
Finish Knob N/A Natural Finish
Finish Retainer N/A Natural finish
Finish Screw N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
Finish Spring N/A Natural Finish
Optional Finish2 N/A
CAD View N/A Unfastened
CAD Supplier N/A PennEngineering® (PEM®)
Inventory N/A {0} N/A {0} N/A {0} N/A {0} 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 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.