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Type CFN broaching fasteners are available for thinner sheet, close-to-edge applications. The locking element provides prevailing torque to eliminate loosening of mating threaded hardware.
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Nylon insert, locking thread nuts – CFN

Nylon Insert Self-Locking Fasteners - Types CFN - Unified
Nylon insert, locking thread nuts – CFN

Nylon Insert Self-Locking Fasteners - Types CFN - Unified
Thread Size N/A .112-40 (#4-40)
Thread Code N/A 440
Shank Code N/A 1
A (Shank) ± .003
N/A .040 in Nylon-Insert-Self-Locking-Fasteners---Types-CFN-2.jpg
Min. Sheet Thickness1 N/A .043 in
Hole Size in Sheet + .003 - .000 N/A .152 in
C ± .002 N/A .162 in
D ± .004 N/A .175 in
E + .001 - .004 N/A .203 in
T Max. N/A .104 in
Min. Dist. Hole C/L to Edge N/A .115 in
Max. Temperature Limit N/A 250 ºF120 ºC
Fastener Materials - Locking Element N/A Blue Nylon
For Use in Sheet Hardness2 N/A HRB 60 / HB 107 or Less
Thread Specification N/A Internal, ANSI B1.1, 2B
Fastener Material N/A Carbon Steel
Standard Finish N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
Optional Finish N/A N/A Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow
CAD Supplier N/A PennEngineering® (PEM®)
  • 1 For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
  • 2 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.