PEM Nuts For Sheet Metal & Key Meaning

Fasteners are hardware devices that mechanically join or affix two or more objects together. They are used to create non-permanent joints, as opposed to welding.
This article summarizes common PEM fasteners, nuts.Which provide threaded inserts and mounting points for sheet metal parts and PC boards.

PEM Nuts for Sheet Metal
  • Floating – A4, AS, AC, LA4, LAC, LAS
  • Blind – B, BS
  • Standard – CLA, CLS, CLSS, H, HN, S, SS, SMPP, SMPS, SP
  • Flush – F, F4
  • Miniature – FE, FEO, FEOX, FEX, U, UL
  • All Metal, Locking Thread – FE, FEO, HNL, LA4, LK, LKA, LKS, SL, PEM RT®, UL
  • Nylon Insert, Locking Thread- CFN, PL, PLC
  • Right Angle, R’ANGLE® – RAA, RAS
  • Installing Into Stainless – A4, LA4, SP
  • Spinning Flare Nut – SFN™
  • Hard Panel Nut – SH™

Floating – Types A4, AS, AC, LA4, LAC, LAS

floating_combo

These fasteners provide load bearing threads in thin sheets and permit up to .030″/0.76mm adjustment for mating hole misalignment.

TypeMeaningDescription
ASSteel,  Non Locking 
ACStainless,  Non Locking 
LASSteel,  Locking 
LACStainless,  Locking 
A4Stainless,  Non Locking Sheetprovide load-bearing threads in stainless steel sheets as thin as .038” with hardness up to HRB 88 on the Rockwell “B” scale.
LA4Stainless,  Self-Lockingprovide load-bearing threads in stainless steel sheets as thin as .038” with hardness up to HRB 88 on the Rockwell “B” scale.
 

Standard Profile – Types CLA, CLS, CLSS, H, HN, HNL, S, SL, SS, SMPP, SMPS, SP

Provides standard profile load bearing internal threads in sheets as thin as .025″ / 0.64 mm.

TypeMeaningDescription
CLANuts, Aluminum.Type CLA is recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 50 or less and HB (Hardness Brinell) 82 or less.
CLS, CLSSNuts, Stainless Steel.Types CLS / CLSS are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 70 or less and HB (Hardness Brinell) 125 or less.
HNuts, Steel, Non Locking. Type H is for use in sheet hardness HRB 80 or less on the Rockwell “B” scale.
HNNuts. Steel, Non Locking.Type HNL are for use in sheet hardness HRB 60 or less on the Rockwell “B” scale.
S, SSNuts, Steel.Types S / SS are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 80 or less and HB (Hardness Brinell) 150 or less.
SMPPNuts For Thin Sheets,StainlessNuts For Thin Sheets,Stainless
SPNuts, Stainless Steel For Use In Stainless Sheets.Type SP is recommended for use in stainless steel sheets HRB (Rockwell “B” scale) 90 or less and HB (Hardness Brinell) 185 or less.

Blind – Types B, BS

blind_combo2

Blind fasteners provide permanently mounted blind threads in metal sheets as thin as .040″/1mm. They provide a barrier to protect threads against foreign matter and limit screw penetration.

Types:
B – Nuts, Self-Clinching Steel Blind Nut
BS – Self-Clinching Stainless Steel Blind But

Flush – Type F, F4

flush_combo2

PEMSERT® self-clinching flush nuts are designed to be completely flush in sheets as thin as .060″/1.5mm. These fasteners are ideal for applications where a thin sheet requires load-bearing threads but still must remain smooth, with no protrusions on either surface.

Types:
F – Nuts, PEMSERT Stainless Steel Flush Nut

Miniature

miniature_combo

PEM® brand miniature fasteners fit into a minimal space and provide strong, reusable threads. These fasteners provide immediate visual indication when proper installation has been accomplished.

Types:
FE – Self-Locking, Long Shank
FEO – Self-Locking, Short Shank
FEOX – Non-Locking, Short Shank
FEX – Non-Locking, Long Shank
U – Non Locking
UL – Locking

All Metal, Locking Thread

all_metal_locking

Provides prevailing torque thread locking capability to resist vibrational loosening.

Types:
FE, FEO, LA4, LAC, LAS, LK, LKA, LKS, SL, PEM RT®, UL

Nylon Insert, Locking Thread

nylon_combo

A nylon hexagonal element provides a reusable, non-metallic prevailing torque thread lock. The strong knurled collar receives the installation force and resists torque. The spin resistance of the knurl greatly exceeds the torque that can be exerted by the self-locking feature.

Types:
CFN – Carbon Steel
PL – Stainless Steel
PLC – Heat Treated Carbon Steel

Right Angle

rangle_combo

Self-Clinching PEM® R’ANGLE® fasteners provide you with strong right angle attachment points in sheets as thin as .040″/1.02mm. R’ANGLE fasteners are cost-effective replacements for: bent edge tabs, bent center tabs, bent flanges, angle brackets, tack welds, and loose hardware.

Types:
RAA – Right Angle, Aluminum
RAS – Right Angle, Steel

Spinning Flare Nut

SFN_combo

PEM® Type SFN™ spinning flare nut is a one piece, flanged hex nut that installs by simply pressing it into a properly sized, prepunched embossed mounting hole. The nut is permanently captive and still spins freely in the sheet. This allows quick attachment to mating hardware, eliminating much of the need for loose fasteners.

Types:
SFN – Carbon Steel

Hard Panel Nuts

combopic_SH

PEM® Type SH installs into thin, harder, high strength steel materials. They allow for overall weight reduction for all vehicles. As well as address environmental / recycle concerns, provide lower installed costs, and allow component standardization.

Types:
Material – Hardened Alloy Steel

Read more about RpProto’s sheet metal fabrication service.  ->

Share this:
Share on facebook
Facebook
Share on twitter
Twitter
Share on linkedin
LinkedIn
Share on reddit
Reddit
Share on pinterest
Pinterest

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top