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.
In precision fixture design and machining setups, managing lateral forces without compromising workpiece positioning is a daily reality on the shop floor. Relying on standard detent components for lateral workholding often leads to pin binding, premature wear, and workpiece deflection.
Mold assembly precision directly dictates manufacturing throughput. Minor component failures cause catastrophic tool damage, unacceptable scrap rates, and severe production bottlenecks. Engineers face constant challenges on the floor.
Quick positioning, alignment, indexing, and securing components in sheet metal or thin-walled enclosures presents a strict mechanical limitation. You face insufficient material thickness to support standard threaded hardware.
Specifying the wrong spring plunger often results in micro-misalignments, premature component wear, or catastrophic part ejection failures during high-speed machining and automation cycles.
In precision engineering, the reliability of positioning, indexing, and holding mechanisms depends entirely on the point of contact between the plunger and the workpiece.
Component failure in indexing, positioning, or ejecting mechanisms frequently traces back to a single engineering oversight: specifying the wrong material for the operating environment.
The relentless demand for miniaturization in medical devices, aerospace components, and consumer electronics requires mechanical hardware that fits microscopic footprints without sacrificing tactile feedback, holding force, or the ability to facilitate easy positioning and removal of parts.
Precise component positioning in mechanical assemblies dictates the difference between seamless indexing and mechanical binding. A fraction of a millimeter in plunger travel matters. Engineers must control this movement to ensure reliable machine operation.
A push button locking pin is only as reliable as its resistance to the operational environment. High shear strength and positive locking mechanisms fail prematurely if corrosion compromises the internal spindle, spring, or detent balls.
Hardware failure in mission-critical environments carries heavy hidden penalties. A degraded fastener rarely just halts a production line. It actively creates severe safety risks and dangerous compliance liabilities for your entire team.
In heavy-duty industrial and aerospace applications, secure fastening is not optional. A single failure in a quick-release mechanism can trigger severe safety hazards. It can cause costly equipment damage or lead to immediate OSHA compliance violations.
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.