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 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.
Indexing plungers are essential components in mechanical assemblies, offering precise positioning, locking, and alignment capabilities. They are widely used in machinery, jigs, fixtures, and industrial equipment, where accurate positioning and repeatable movement are critical.
TIME/VENUE:2026.3.31-4.3 Shenzhen International Conventionand Exhibition Center (Bao'an)BOOTH NO.3-P10
If an indexing plunger starts sticking, failing to seat, or wearing out early, replacing it might "solve" the symptom—but not the cause. Most field issues come from receiving-hole design, alignment stack-up, contamination, or side loading.
In harsh environments, "indexing plunger" is not the full spec. The real spec is: corrosion risk + cleaning method + contamination tolerance + maintenance reality. If you don't design around those, even a premium plunger will feel gritty, stick, or corrode before its expected service life.
"Load rating" sounds simple until a pin bends in the field and everyone asks why. Indexing plunger pins rarely fail from pure axial force. They fail because real assemblies introduce shear, bending, misalignment, and vibration—often all at once.
A standard indexing plunger is designed to re-engage automatically. That's great—until it isn't. In fast changeovers, rotating plates, or safety-critical adjustments, you may need the opposite behavior: the pin must stay retracted until the operator intentionally releases it.
When an indexing plunger "doesn't feel reliable," the issue is often not the plunger. It's the hole. Bore size, chamfer, and engagement depth decide whether the pin finds the target smoothly—or fights burrs, edge damage, and misalignment for the rest of its life.
Did you know that using the wrong set screw can cause permanent damage to delicate components? Whether you're working with polished aluminum, plastic housings, or precision assemblies, a traditional metal set screw might scratch, deform, or even crack your components.
What do medical devices, precision electronics, and high-end furniture have in common? They all require non-marring, precision fastening solutions—and nylon tip set screws are the go-to choice.Standard fasteners often cause more harm than good in delicate assemblies.
Did you know that a single fastener can determine whether your assembly lasts for years or fails within weeks? It's not always about the size or strength of the screw—it's about the application fit. In industries where surface integrity, vibration control, and precision are essential, the nylon tip set screw is often the unsung hero.
"One wrong screw can ruin your entire assembly." That's not an exaggeration—it's a reality many engineers and manufacturers face when choosing between different types of fasteners. Imagine tightening a set screw into a soft aluminum or plastic surface, only to find cracks, scratches, or permanent damage.
In many industries, fastening delicate components without causing surface damage is a constant challenge. That's where nylon tip set screws come in — a smart and reliable solution for non-marring, vibration-resistant fastening.
When you use a sliding door or open a drawer, you can feel the smooth stop and click. This comes from the ball head plunger and spring plunger inside. A high-quality ball head plunger uses strong materials like 304 stainless steel. This gives you better durability and protects against rust.
You use a plastic ball plunger to move parts gently. Material is important. POM and PA work for everyday jobs. PEEK is better for hot or tough places. Ball plungers keep electronics and molds safe. They protect soft surfaces.
Hygiene is very important in food processing. Every part, even a stainless steel ball plunger, must meet hygiene rules. Clean machines help keep food safe for people. Picking parts that resist germs and rust means you can trust your equipment for years.
You use spring ball plunger technology to get steady preload and close tolerances in your automation equipment. Spring-loaded plungers help you get exact positioning. This makes design and performance better.