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PennEngineering
All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Nuts for Sheet Metal > All Metal, Locking Thread Nuts – Types FE, FEO, HNL, LA4, LAC, LAS, LK, LKA, LKS, SL, UL, RT > All Metal, RT® Free-Running Locknuts > All Metal, RT® Free-Running Locknuts - Metric > Part # S-RTM4-2ZC  

Part # S-RTM4-2ZC, All Metal, RT® Free-Running Locknuts - Metric

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PEM® S-RT™ free-running locknuts are free-running until clamp load is induced. A modified thread angle on the loaded flank provides the vibration resistant locking feature.
  • Screw turns freely until a clamp load is applied.
  • Resistant to vibrational loosening.
  • Back side of panel is flush or sub-flush for screw installation.
  • Locking feature reusability is not affected by number of on/off cycles.
  • Uses same mounting hole and installation tooling as standard S™ nut fasteners found in PEM® Bulletin CL.




 Specifications   

Thread Size x Pitch
M4 x 0.7

Thread Code
RTM4

Shank Code
2

A (Shank) Max.

 View
1.38 mm

Rec. Min. Sheet Thickness1
1.4 mm

Hole Size in Sheet + 0.08
5.41 mm

C Max.
5.38 mm

E ± 0.25
7.87 mm

T ± 0.25
2 mm

Min. Dist. Hole C/L to Edge
6.9 mm

For Use in Sheet Hardness
HRB 80 / HB 150 or less

Thread Specification
Modified thread form on loaded flank. Will accept a maximum material 6g screw.

Fastener Material
Hardened Carbon Steel

Optional Finish
Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow

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



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PEM Bulletin CL