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PEM® 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.
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All Metal, S-RT Free-Running Locknuts

All Metal, RT® Free-Running Locknuts - Metric
All Metal, S-RT Free-Running Locknuts

All Metal, RT® Free-Running Locknuts - Metric
All Metal, S-RT Free-Running Locknuts

All Metal, RT® Free-Running Locknuts - Metric
All Metal, S-RT Free-Running Locknuts

All Metal, RT® Free-Running Locknuts - Metric
All Metal, S-RT Free-Running Locknuts

All Metal, RT® Free-Running Locknuts - Metric
Description N/A 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.
Thread Size x Pitch N/A M6 x 1 N/A M3 x 0.5 N/A M4 x 0.7 N/A M5 x 0.8 N/A M6 x 1
Thread Code N/A RTM6 N/A RTM3 N/A RTM4 N/A RTM5 N/A RTM6
Shank Code1 N/A 0
A (Shank) Max.
N/A 0.89 mm RT-Drawing.jpg N/A 0.77 mm RT-Drawing.jpg N/A 0.77 mm RT-Drawing.jpg N/A 0.77 mm RT-Drawing.jpg N/A 1.15 mm RT-Drawing.jpg
Rec. Min. Sheet Thickness2 N/A 0.92 mm N/A 0.8 mm N/A 0.8 mm N/A 0.8 mm N/A 1.2 mm
Hole Size in Sheet + 0.08 N/A 8.75 mm N/A 4.22 mm N/A 5.41 mm N/A 6.35 mm N/A 8.75 mm
C Max. N/A 8.73 mm N/A 4.2 mm N/A 5.38 mm N/A 6.33 mm N/A 8.73 mm
E ± 0.25 N/A 11.18 mm N/A 6.35 mm N/A 7.87 mm N/A 8.64 mm N/A 11.18 mm
T ± 0.25 N/A 4.08 mm N/A 1.5 mm N/A 2 mm N/A 2 mm N/A 4.08 mm
Min. Dist. Hole C/L to Edge3 N/A 8.6 mm N/A 4.8 mm N/A 6.9 mm N/A 7.1 mm N/A 8.6 mm
For Use in Sheet Hardness N/A HRB 80 / HB 150 or less
Thread Specification N/A Modified thread form on loaded flank. Will accept a maximum material 6g screw.
Fastener Material N/A Hardened Carbon Steel
Standard Finish N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
Optional Finish4 N/A
CAD Supplier N/A PennEngineering® (PEM®)
Inventory N/A {0} N/A {0} N/A {0} N/A {0} N/A {0}
  • 1 Other shank and screw lengths available.
  • 2 For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
  • 3 To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.
  • 4 “BL” suffix will be added to part number to designate DuraBlack™ finish.