Table Of Content
Difference Between Lock Nut and Jam Nut
| Feature | Jam Nut | Lock Nut |
|---|---|---|
| Design | Hexagonal But Thinner | Hex Shape with Nylon Inserts |
| Removal and Installation | Require a Two Wrench Method | Require Additional Torque |
| Applications | Automotive | Aerospace |
| Load Capacity | Do Not Carry Primary Load | Withstand Dynamic Loads |
| Material Options | Stainless Steel, Carbon Steel, Brass | Made From Same Materials |
| Performance | Well in High Temperature | Best for High Temperature Applications |
| Torque | High Level Torque | Low Level Torque |
What is Lock Nut?
Nylock nut also called as a lock nut is designed to resist loosening from torque, vibrations or shocks. Nyloc nut temperatures below 93°C. Nylon nuts for high temperature applications where nylon would fail. Nylock nut making for automotive, machinery, construction, aerospace. Self locking nut generally hexagonal in shape with internally threads. Lock nut creating friction between the bolt threads and nut that holds it in place.
What is Jam Nut?
Jam nut also known thin hex nuts. Jam hex nut is a low profile nut, normally half height of standard nut. Jam lock nut is threaded onto a bolt first and tightened lightly. Jam nut is designed to a locking mechanism. ASME B18.2.2 jam nuts reduced height allows them to fit where standard nuts. Heavy jam nuts have hexagonal shapes but thinner than standard hex nuts. Jam nut come in various materials such a stainless steel, carbon steel. Jam hex nut available in imperial and metric sizes.
Jam Nut vs Lock Nut Specifications
| Nylock Nut | Specification | Jam Nut | Specification |
|---|---|---|---|
| Uses: | Light Poles | Lock Type: | Secure |
| Also Called: | Nylon Ring | Ideal For: | Machinery |
| Manufacturing Process: | CNC Machine | Finish: | Hot Dip Galvanized |
| Evolve From: | Nylon Insert Lock Nut | Characteristics: | Thin Profile |
| Resistance To: | Self Loosening | Load Proof: | Higher |
Applications Wise Difference Between Jam Nut and Lock Nut
| Jam Nut | Lock Nut |
|---|---|
| Petrochemical | Automotive |
| Oil & Gas | Construction |
| Construction | Machinery |
| Renewable Energy | Aerospace |
| Automotive | Railways |
| Infrastructure | Manufacturing |
What are Nyloc Nut Thread Sizes?
Common nyloc nut thread sizes such a M20, M16, M12, M10, M8, M6, M5, M4 and M3.
What are Nylon Nuts Made of?
For heavy duty applications, Nylon nuts made by stainless steel, mild steel, carbon steel, brass, or zinc.
Surface Bearing Self Locking Nut
When to Use Jam Hex Nut?
Imperial Jam Nut Sizes
| Diameter | UNF Thread Pitch (TPI) | UNC Thread Pitch (TPI) |
|---|---|---|
| 1 | 12 | 8 |
| 3/4 | 16 | 10 |
| 1/2 | 20 | 13 |
| 3/8 | 24 | 16 |
| 1/4 | 28 | 20 |