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.
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Part #

Thread Size

Blind Mounting Hole Diameter + .003 - .000

L - Length ± .015

E ± .010

C Max.

Fastener Material

Standard Finish

CAD

CHA-440-4 N/A .112-40 (#4-40) N/A .172 in N/A .250 in N/A .205 in N/A .171 in N/A Aluminum N/A N/A 103704
CHA-632-4 N/A .138-32 (#6-32) N/A .213 in N/A .250 in N/A .250 in N/A .212 in N/A Aluminum N/A N/A 103704
CHA-832-4 N/A .164-32 (#8-32) N/A .290 in N/A .250 in N/A .328 in N/A .289 in N/A Aluminum N/A N/A 103704
CHA-440-6 N/A .112-40 (#4-40) N/A .172 in N/A .375 in N/A .205 in N/A .171 in N/A Aluminum N/A N/A 103704
CHA-632-6 N/A .138-32 (#6-32) N/A .213 in N/A .375 in N/A .250 in N/A .212 in N/A Aluminum N/A N/A 103704
CHA-832-6 N/A .164-32 (#8-32) N/A .290 in N/A .375 in N/A .328 in N/A .289 in N/A Aluminum N/A N/A 103704
CHA-032-6 N/A .190-32 (#10-32) N/A .312 in N/A .375 in N/A .350 in N/A .311 in N/A Aluminum N/A N/A 103704
CHA-440-8 N/A .112-40 (#4-40) N/A .172 in N/A .500 in N/A .205 in N/A .171 in N/A Aluminum N/A N/A 103704
CHA-632-8 N/A .138-32 (#6-32) N/A .213 in N/A .500 in N/A .250 in N/A .212 in N/A Aluminum N/A N/A 103704
CHA-832-8 N/A .164-32 (#8-32) N/A .290 in N/A .500 in N/A .328 in N/A .289 in N/A Aluminum N/A N/A 103704
CHA-032-8 N/A .190-32 (#10-32) N/A .312 in N/A .500 in N/A .350 in N/A .311 in N/A Aluminum N/A N/A 103704
CHA-440-10 N/A .112-40 (#4-40) N/A .172 in N/A .625 in N/A .205 in N/A .171 in N/A Aluminum N/A N/A 103704
CHA-632-10 N/A .138-32 (#6-32) N/A .213 in N/A .625 in N/A .250 in N/A .212 in N/A Aluminum N/A N/A 103704
CHA-832-10 N/A .164-32 (#8-32) N/A .290 in N/A .625 in N/A .328 in N/A .289 in N/A Aluminum N/A N/A 103704
CHA-032-10 N/A .190-32 (#10-32) N/A .312 in N/A .625 in N/A .350 in N/A .311 in N/A Aluminum N/A N/A 103704
CHA-440-12 N/A .112-40 (#4-40) N/A .172 in N/A .750 in N/A .205 in N/A .171 in N/A Aluminum N/A N/A 103704
CHA-632-12 N/A .138-32 (#6-32) N/A .213 in N/A .750 in N/A .250 in N/A .212 in N/A Aluminum N/A N/A 103704
CHA-832-12 N/A .164-32 (#8-32) N/A .290 in N/A .750 in N/A .328 in N/A .289 in N/A Aluminum N/A N/A 103704
CHA-032-12 N/A .190-32 (#10-32) N/A .312 in N/A .750 in N/A .350 in N/A .311 in N/A Aluminum N/A N/A 103704
CHA-632-16 N/A .138-32 (#6-32) N/A .213 in N/A 1.00 in N/A .250 in N/A .212 in N/A Aluminum N/A N/A 103704
CHA-832-16 N/A .164-32 (#8-32) N/A .290 in N/A 1.00 in N/A .328 in N/A .289 in N/A Aluminum N/A N/A 103704
CHA-032-16 N/A .190-32 (#10-32) N/A .312 in N/A 1.00 in N/A .350 in N/A .311 in N/A Aluminum N/A N/A 103704
CFHA-440-4 N/A .112-40 (#4-40) N/A .172 in N/A .250 in N/A .205 in N/A .171 in N/A Aluminum N/A N/A 103704
CFHA-632-4 N/A .138-32 (#6-32) N/A .213 in N/A .250 in N/A .250 in N/A .212 in N/A Aluminum N/A N/A 103704
CFHA-832-4 N/A .164-32 (#8-32) N/A .290 in N/A .250 in N/A .328 in N/A .289 in N/A Aluminum N/A N/A 103704
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