Search our PEM catalog here, or view other manufacturers.

  1. Manufacturers
  2. Services
  3. About Us
  4. What’s New
  5. Careers
  6. Contact
  7. Search

Product Catalog

Tel 800.466.1940
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Request CAD files
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.
Request Information Search by Specification Add to CAD Cart
Unit of Measure
Items
All Metal, S-RT Free-Running Locknuts

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

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

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

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

All Metal, RT® Free-Running Locknuts - Unified
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 N/A .112-40 (#4-40) N/A .138-32 (#6-32) N/A .164-32 (#8-32) N/A .190-32 (#10-32) N/A .250-20 (1/4-20)
Thread Code N/A RT440 N/A RT632 N/A RT832 N/A RT032 N/A RT0420
Shank Code1 N/A 0
A (Shank) Max.
N/A .030 in RT-Drawing.jpg N/A .030 in RT-Drawing.jpg N/A .030 in RT-Drawing.jpg N/A .030 in RT-Drawing.jpg N/A .045 in RT-Drawing.jpg
Rec. Min. Sheet Thickness2 N/A .030 in N/A .030 in N/A .030 in N/A .030 in N/A .047 in
Hole Size in Sheet + .003 - .000 N/A .166 in N/A .1875 in N/A .213 in N/A .250 in N/A .344 in
C Max. N/A .165 in N/A .187 in N/A .212 in N/A .249 in N/A .343 in
E ± .010 N/A .250 in N/A .280 in N/A .310 in N/A .340 in N/A .440 in
T ± .010 N/A .070 in N/A .070 in N/A .090 in N/A .090 in N/A .170 in
Min. Dist. Hole C/L to Edge3 N/A .19 in N/A .22 in N/A .27 in N/A .28 in N/A .34 in
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.