PEM® self-clinching studs are installed by placing them in properly sized holes in the sheets and squeezing into place with any standard press. The squeezing action embeds the head of the stud into the sheet. The metal displaced by the head flows smoothly and evenly around the ribs and into the annular groove – creating a flushhead assembly and securely locking the stud into the sheet with high torque-out and pushout resistances.

FH4 & FHP (flush-head) Studs for Stainless Steel are designed to provide strong threads in stainless steel sheets as thin as .040” . Type FHP studs have high corrosion resistance. Both types are designed for use in stainless steel sheets with a hardness of 92 or less on the Rockwell “B” scale
  • Recommended for use in stainless steel sheets HRB (Rockwell “B” Scale) 92 or less and HB (Hardness Brinell) 195 or less.
  • Type FHP offers high corrosion resistance and ideal for medical, foodservice, and marine applications.
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Unit of Measure

Thread Size

 .112-40 (#4-40)

Thread Code

 440

Length Code

 8

Material Code

 4
Sheet Thickness1 .040 to .095 in

Hole Size in Sheet + .003 - .000

 .111 in

Max. Hole in Attached Parts

 .131 in

L - Length ± .015

 .500 in
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H ± .015

 .176 in
S Max.2 .085 in

Min. Dist. Hole C/L to Edge

 .219 in

For Use in Sheet Hardness

 HRB 92 / HB 195 or Less

Thread Specification

 External, ANSI B1.1, 2A

Fastener Material

 400 Series Stainless Steel

Standard Finish

 Passivated and/or tested per ASTM A380

CAD Supplier

 PennEngineering® (PEM®)
  • 1 For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
  • 2 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.