PennEngineering Datasheets for Locknuts

Locknuts are a type of prevailing-torque fastener that resists loosening under vibration and torque. They differ from standard nuts because they typically have friction-increasing bearing surfaces (e.g., pitted grooves on flanges) or special internal thread-geometries.
Locknuts: Learn more

Product Name Notes
S-RT® Free-Running Locknuts - Metric -- S-RT Series
S-RT® Free-Running Locknuts - Unified -- S-RT Series
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...
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M3-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M3-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M3-5-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M3-5-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M4-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M4-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M5-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M5-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M6-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M6-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M8-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Metric -- SL-M8-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-032-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-032-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-0420-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-0420-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-0518-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-0518-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-440-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-440-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-632-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-632-2ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-832-1ZI
Trident Heat-Treated Carbon Steel Locknuts - Type SL - Unified -- SL-832-2ZI
Type SL self-locking nuts are designed with a unique and economical TRI-DENT® locking feature, which meets demanding locking performance requirements. 3 cycle locking performance. Achieved using steel socket head cap...