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All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Studs and Pins for Sheet Metal > Flush-Head Studs – Types FH, FH4, FHA, FHP, FHS, FHX > Flush-Head Studs for Stainless Steel Sheets – Types FH4, FHP > Self-Clinching Studs for Stainless Steel Sheets - Types FH4™ and FHP™ - Unified > Part # FH4-0420-8  

Part # FH4-0420-8, Self-Clinching Studs for Stainless Steel Sheets - Types FH4™ and FHP™ - Unified

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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.




 Specifications   

Thread Size
.250-20 (1/4-20)

Thread Code
0420

Length Code
8

Material Code
4

Sheet Thickness
.062 to .117 in

Hole Size in Sheet + .003 - .000
.249 in

Max. Hole in Attached Parts
.269 in

L - Length ± .015

 View
.500 in

H ± .015
.337 in

S Max.1
.135 in

Min. Dist. Hole C/L to Edge
.312 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 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.


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