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.
- 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
These fasteners provide load bearing threads in thin sheets and permit up to .030″/0.76mm adjustment for mating hole misalignment.
| Type | Meaning | Description |
|---|---|---|
| AS | Steel, Non Locking | |
| AC | Stainless, Non Locking | |
| LAS | Steel, Locking | |
| LAC | Stainless, Locking | |
| A4 | Stainless, Non Locking Sheet | provide load-bearing threads in stainless steel sheets as thin as .038” with hardness up to HRB 88 on the Rockwell “B” scale. |
| LA4 | Stainless, Self-Locking | provide 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.
| Type | Meaning | Description |
|---|---|---|
| CLA | Nuts, 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, CLSS | Nuts, 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. |
| H | Nuts, Steel, Non Locking. | Type H is for use in sheet hardness HRB 80 or less on the Rockwell “B” scale. |
| HN | Nuts. Steel, Non Locking. | Type HNL are for use in sheet hardness HRB 60 or less on the Rockwell “B” scale. |
| S, SS | Nuts, 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. |
| SMPP | Nuts For Thin Sheets,Stainless | Nuts For Thin Sheets,Stainless |
| SP | Nuts, 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 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.
Flush – Type F, F4
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.
Miniature
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.
All Metal, Locking Thread
Provides prevailing torque thread locking capability to resist vibrational loosening.
Nylon Insert, Locking Thread
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
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
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.
Hard Panel Nuts
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.
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