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Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified
Concealed Head Studs – Types CFHA, CFHC, CHA, CHC
These studs ensure permanent mounting in metal sheets as thin as .062 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.
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.
Unit of Measure
Items |
CHA-440-4 Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified |
CHA-632-4 Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified |
CHA-832-4 Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified |
CHA-440-6 Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified |
CHA-632-6 Concealed-Head Studs - Types CHA,CFHA,CHC,CFHC - Unified |
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Thread Size | N/A .112-40 (#4-40) | N/A .138-32 (#6-32) | N/A .164-32 (#8-32) | N/A .112-40 (#4-40) | N/A .138-32 (#6-32) | |||||
Thread Code | N/A 440 | N/A 632 | N/A 832 | N/A 440 | N/A 632 | |||||
Length Code | N/A 4 | N/A 4 | N/A 4 | N/A 6 | N/A 6 | |||||
Material Code | N/A A | |||||||||
Min. Sheet Thickness | N/A .062 in | |||||||||
Blind Mounting Hole Diameter + .003 - .000 | N/A .172 in | N/A .213 in | N/A .290 in | N/A .172 in | N/A .213 in | |||||
Min. Depth of Blind Hole1 | N/A .043 in | |||||||||
L - Length ± .015 |
N/A
.250 in
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N/A
.250 in
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N/A
.250 in
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N/A
.375 in
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N/A
.375 in
|
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A Max. | N/A .041 in | |||||||||
E ± .010 | N/A .205 in | N/A .250 in | N/A .328 in | N/A .205 in | N/A .250 in | |||||
C Max. | N/A .171 in | N/A .212 in | N/A .289 in | N/A .171 in | N/A .212 in | |||||
Min. Dist. Hole C/L to Edge | N/A .156 in | N/A .188 in | N/A .219 in | N/A .156 in | N/A .188 in | |||||
Max. Hole in Attached Parts | N/A .135 in | N/A .160 in | N/A .185 in | N/A .135 in | N/A .160 in | |||||
For Use in Sheet Hardness2 | N/A HRB 50 / HB 82 or less | |||||||||
Thread Specification | N/A External, ANSI B1.1, 2A | |||||||||
Fastener Material | N/A Aluminum | |||||||||
Standard Finish | N/A | |||||||||
CAD Supplier | N/A PennEngineering® (PEM®) | |||||||||
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