Shape: Round Shape
• Material: 4140 Alloy Steel
• Surface Treatment: Surface Treatment Provided
• Screw Type: Metric (Fine) Thread
• Type: Lock Nuts

Materials

| Part Number |
| ZPLNY8 |
| Part Number | MxPitch | D | d | B | S | T | m | Perpendicularity of End Face (Max.) | Max. Tightening Torque (N·m) | |
| Type | M | (Fine) | Set Screw | |||||||
| (Standard) ZPLNY (High-Grade) ZPLN | 8 | 8x0.75 | 16 | 11 | 8 | 3 | 2 | 2xM4 | · PLNY 0.005 · PLN 0.002 | 3.5 |
| 10 | 10x1.0 | 18 | 13 | |||||||
| 12 | 12x1.0 | 20 | 16 | |||||||
| 15 | 15x1.0 | 25 | 21 | |||||||
| 17 | 17x1.0 | 28 | 23 | 10 | 4 | 2xM5 | 4.5 | |||
| 20 | 20x1.0 | 32 | 27 | 3xM5 | ||||||
| 25 | 25x1.5 | 38 | 33 | 12 | 5 | 3xM6 | 8.0 | |||
| 30 | 30x1.5 | 45 | 40 | |||||||
| 35 | 35x1.5 | 52 | 47 | |||||||
| 40 | 40x1.5 | 58 | 52 | 14 | 6 | 2.5 | ||||
| 45 | 45x1.5 | 65 | 59 | |||||||
| 50 | 50x1.5 | 70 | 64 | 3xM8 | 18.0 | |||||
| 55 | 55x2.0 | 75 | 68 | 16 | 7 | 3 | ||||
| 60 | 60x2.0 | 80 | 73 | |||||||
Frequently asked questions about this product (FAQ)
1. Do I need to add grease to lock the nut
Both tightening and loosening require the use of lubricants. If the hardness of the fixed shaft is relatively low, please use lubricating grease with high lubricity
2. Precautions when fixing
To ensure the maximum effect of the locking nut, please expose the threaded part by more than 2 inches during fixation. The standard locking nut is a round nut with four small grooves on its outer circumference, which can be tightened on the stud body with a crescent wrench. The locking nut should be equipped with a shaft washer, which can fix the small groove on the stud body relative to the small groove on its outer circumference to prevent it from loosening.
3. The difference between ordinary nuts and lock nuts
1. Different vibration resistance performance
Ordinary nuts: relatively poor compared to locking nuts
Locking nut: Superior vibration resistance. When the thread is tightened, the top thread of the bolt tightly enters the 30 ° wedge-shaped slope of the nut and is clamped. The normal force generated by the applied force on the wedge-shaped slope forms a 60 ° angle with the axis of the bolt, rather than a 30 ° angle. Therefore, the normal force generated by the locking nut during tightening is much greater than that of ordinary standard nuts, which has great anti loosening and anti vibration capabilities.
2. Different wear resistance and shear resistance
Ordinary nuts: poor wear resistance and shear resistance;
Locking nut: Strong wear resistance and shear resistance. The 30 ° inclined surface of the nut thread base can evenly distribute the locking force of the nut on all threads of each tooth. Due to the uniform distribution of the compression force on the thread surface of each tooth, the nut can effectively solve the problems of thread wear and shear deformation.
3. Different reuse rates
Ordinary nuts: low reuse rate;
Locking nut: High reuse rate. Extensive use has shown that after repeated tightening and dismantling of the lock nut, its locking force remains unchanged and can maintain its original locking.
Specifying fastening hardware in load-bearing environments carries incredibly high stakes. Mechanical failure is simply not an option. You rely on these components to hold massive structures and critical machinery together under immense stress.
Specify the wrong dimensions for a push button locking pin, and the assembly either fails to lock entirely or suffers from excessive axial play. This loose tolerance accelerates mechanical wear. The most common point of failure in procurement involves confusing "overall length" and "grip length."
Exacting engineering environments leave absolutely no room for guesswork. A fraction of a millimeter often determines whether an assembly holds under immense pressure or fails catastrophically.
In mission-critical applications—from aerospace rigging to medical structural supports—the failure of a quick-release fastener is not just a maintenance nuisance. It is a system-level vulnerability. Engineers often over-index on static shear strength when evaluating these components.
Industrial engineers often face a frustrating terminology paradox. You might hear procurement teams use hardware terms loosely. They ask for ball lock pins today. They ask for push button pins tomorrow. They assume these represent completely different fastening systems.
In precision industrial environments, every second of assembly time counts. Engineers require reliable, tool-less fastening solutions. You need components built for speed and absolute security. The push button locking pin meets this demand perfectly.
Manual fastening in high-vibration or load-bearing environments often forces a difficult engineering trade-off. Technicians must usually choose between maximum physical security and rapid operational speed. Traditional threaded fasteners require tedious manual tightening.
A push button locking pin acts as a critical failure point in high-load, fast-assembly environments. From aerospace assemblies and line array audio systems to heavy lifting and industrial Lockout/Tagout (LOTO) protocols, these small components carry massive operational stakes.
Push button locking pins appear as incredibly simple, reliable mechanisms at first glance. Yet, specifying the wrong pin compromises structural integrity, operator safety, and overall application efficiency. Even a minor oversight can lead to catastrophic system failure.
Selecting the exact right positive locking mechanism demands a rigorous balance. Engineers must weigh rapid manual actuation against sheer strength and environmental resilience. For decision-makers, the stakes remain incredibly high.
A push button locking pin is often a low-cost component. Yet, it frequently secures high-value industrial assets. Sizing errors carry severe operational consequences. They lead to excessive machine downtime. They cause mechanical binding during daily assembly.
Engineers constantly seek efficient ways to secure moving parts in complex assemblies. A push-pull spring plunger serves as a critical mechanical component for indexing, positioning, and locking these mechanisms seamlessly.
Engineers often drop a detent pin into a design blindly. You might expect it to handle whatever mechanical forces come its way. However, this assumption introduces severe mechanical risks.
Designing mechanical assemblies often hinges on a single, vital interaction point. You must perfectly match a spring plunger to its mating surface. This tiny engagement zone dictates the tactile feel and reliability of the entire mechanism.
Manufacturing thrives on absolute precision and repeatable actions. Engineers constantly seek reliable mechanical components designed to apply accurate, repeatable spring end-forces in tooling, fixtures, and automated machinery.
Repeatable precision in manufacturing, tooling, and product assembly depends heavily on minor mechanical components. They must function reliably over thousands of continuous cycles to prevent production halts.
In precision machinery and industrial applications, choosing the right mechanical locking or positioning component is critical for reliability, safety, and efficiency. Two common devices used for positioning and locking are indexing plungers and ball lock pins.
Indexing plungers are vital mechanical components used to secure, position, and lock movable parts in machinery, fixtures, jigs, and industrial equipment.
Custom indexing plungers are essential components in specialized machinery, industrial equipment, and precision assemblies.
Indexing plungers are essential mechanical components used across various industries to ensure precise positioning, secure locking, and repeatable alignment in machinery, fixtures, jigs, and other adjustable assemblies.