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All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Studs and Pins for Sheet Metal > Type HFLH™ Hard Panel Studs > Type HFLH™ Hard Panel Studs - Unified > Part # HFLH-0518-8ZI  

Part # HFLH-0518-8ZI, Type HFLH™ Hard Panel Studs - Unified

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  • 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




 Specifications   

Thread Size
.313-18 (5/16-18)

Thread Code
0518

Length Code
8

Min. Sheet Thickness
.060 in

Hole Size in Sheet + .005 - .000
.312 in

L - Length ± .015

 View
.500 in

H ± .01
.586 in

S Max.1
.133 in

T Max.
.083 in

Max. Hole in Attached Parts
.402 in

Min. Dist. Hole C/L to Edge
.560 in

Tensile strength
120 ksi

For Use in Sheet Hardness2
HRB 96 / HB 216 or Less

Thread Specification
External, ASME B1.1, 2A / ASME B1.13M, 6g

Fastener Material
Heat-Treated Alloy Steel

Standard Finish
Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

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



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