CFHC-440-8

Concealed-Head Studs – Types CHA,CFHA,CHC,CFHC

CFHC-440-8

Concealed-Head Studs – Types CHA,CFHA,CHC,CFHC

These studs ensure permanent mounting in metal sheets as thin as .093 in.

The fastener head is locked securely in a blind, milled hole and is able to handle substantial loads. The concealed-head feature allows the side of the sheet opposite installation to remain smooth.

Sheet preparation only requires a milled blind hole to the recommended minimum depth. Center-cutting end mills for hole preparation are available from PennEngineering. Installation of the concealed-head studs and standoffs is simple using a hollow anvil and solid punch. Place the head of the fastener in the hole and insert using any standard press. Displaced sheet metal flows smoothly around the head into the undercut.

Specifications

Thread Code
440
Thread Size
#4-40
Thread Specification
2A, ANSI B1.1, External
Fastener Material
300 Series Stainless Steel
Material Code
C
Standard Finish
Passivated and/or tested
For Use in Sheet Hardness
HRB 70 / HB 125 or Less
Length Code
8
Product Category
Concealed-Head Studs – Types CHA,CFHA,CHC,CFHC
CAD Supplier
PennEngineering® (PEM®)
CADPartID
103704
Application Type
Aerospace, Automotive, Automotive Electronics, Commercial Vehicles, Datacom, Electric Vehicle Chargers, Electric Vehicles, Industrial, Manufacturing & Sheet Metal Fabrication, Medical, Renewable Energy, Telecom
Base Panel Material
Aluminum, Steel, Water Tightness
Brand
PEM
Fastener Characteristics
Threaded External
Industry
Automotive, Automotive Electronics, Datacom & Telecom, Defense, Industrial & Commercial, Medical
Installation Equipment/Method
C-Frame Automatic Feed, C-Frame Manual Feed
PEM Product Family
CH
Product Type
Studs
Technology Type
Self-Clinching
Unit (Metric/Unified)
Unified
A Max._in
0.071in
Blind Mounting Hole Diameter + .003 – .000_in
0.172in
E ± .010_in
0.205in
L Len Pm 015in Or 4mm
0.5in
Max. Hole in Attached Parts_in
0.135in
Min. Depth of Blind Hole_in
0.075in
Min. Dist. Hole C/L to Edge_in
0.156in
Min. Sheet Thickness_in
0.093in
C Max._in
0.171in

Resources

Installation & Performance Data

ch-chc-cfhc-cha-cfha-studs-unified
TYPE THREAD CODE MAX. TIGHTENING TORQUE REF. (in. lbs.) TEST SHEET MATERIAL INSTALLATION (lbs.) PULLOUT (lbs.)
CFHC 440 4.75 Cold-Rolled Steel 2000 240
CFHC 440 4.75 5052-H34 Aluminum 1500 200

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