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PEM® Brand Fasteners for Metal Sheets and Panels
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Studs and Pins for Sheet Metal
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Type HFLH™ Hard Panel Studs
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Type HFLH™ Hard Panel Studs - Unified
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Part # HFLH-0420-24X
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Part # HFLH-0420-24X, Type HFLH™ Hard Panel Studs - Unified
Installs into thinner, harder, high strength steel materials (high strength steel sheets up to 700 MPa maximum ultimate tensile)
Allows overall weight reduction for all vehicles
Provides lower installed cost
Compare to other thin sheet fastening devices:
Addresses environmental concerns
Lighter weight
Close to edge of panel mounting
No embossing required
Hardened stud material provides stronger thread strength
Can be installed automatically using press or in-die technology
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Specifications
Thread Size
.250-20 (1/4-20)
Thread Code
0420
Length Code
24
Min. Sheet Thickness
.040
in
Hole Size in Sheet + .005 - .000
.250
in
L - Length ± .015
1.50
in
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H ± .01
.462
in
S Max.
1
.118
in
T Max.
.060
in
Max. Hole in Attached Parts
.340
in
Min. Dist. Hole C/L to Edge
.470
in
Tensile strength
120
ksi
For Use in Sheet Hardness
2
HRB 96 / HB 216 or Less
Thread Specification
External, ASME B1.1, 2A / ASME B1.13M, 6g
Fastener Material
Heat-Treated Alloy Steel
Optional Finish
3
No Finish (with Rust Preventative Oil)
CAD Supplier
PennEngineering® (PEM®)
1
Threads are gageable to within 2 pitches of the "S" Max. dimension. A class 3B/5H maximum material commercial nut shall pass up to the "S" Max. dimension.
2
HRB - Hardness Rockwell "B" Scale. HB - Hardness Brinell
3
“X” suffix studs may have pitch diameters and major diameters below 2A “Basic”, per ANSI B1.1, Section 7, and B1.13M, Section 8 to allow for minimum of 0.0002” / 0.0051 mm of plating.
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