AYA FASTENERS Guide | Why Use Slotted Headless Screws?
Mar 31, 2023
Slotted Headless Screws are among the ideal types of screws or bolts used for various purposes. They are the screws that come with headless and slot-cut-on one-end ability. These types of screws let you quickly tighten with a slotted screwdriver. These screws are usually made of steel or stainless steel, making them strong screws. But you can also find them in materials like brass, acid-resistant steel, and more. These screws are ideal for those who want a screw with solid materials.
They are a type of assembly screw that ensures that your object tightens in a way that ensures your pieces stay together as long as they can. The best part of these screws is that when these screws get tightened, the point exerts a compressional force against the surface of an inner object. These screws are widely demanded in various industries. Moreover, these screws are available in various sizes, shapes, materials, surface coatings, strength classes, drive configurations, and other options.
Slotted Headless Screws Dimension Table(DIN 427)
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| Thread Size | M1 | M1.2 | M1.4 | M1.6 | M2 | M2.5 | M3 | (M3.5) | M4 | ||
| d | |||||||||||
| P | Pitch | 0.25 | 0.25 | 0.3 | 0.35 | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | |
| b | min=nominal size | 1.2 | 1.4 | 1.7 | 1.9 | 2.4 | 3 | 3.6 | 4.2 | 4.8 | |
| max | 1.7 | 1.9 | 2.3 | 2.6 | 3.2 | 3.9 | 4.6 | 5.4 | 6.2 | ||
| ds | max=nominal size | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | |
| min | 0.86 | 1.06 | 1.26 | 1.46 | 1.86 | 2.36 | 2.86 | 3.32 | 3.82 | ||
| n | Nominal Size | 0.2 | 0.2 | 0.2 | 0.25 | 0.25 | 0.4 | 0.4 | 0.5 | 0.6 | |
| min | 0.26 | 0.26 | 0.26 | 0.31 | 0.31 | 0.46 | 0.46 | 0.56 | 0.66 | ||
| max | 0.4 | 0.4 | 0.4 | 0.45 | 0.45 | 0.6 | 0.6 | 0.7 | 0.8 | ||
| t | max | 0.52 | 0.52 | 0.63 | 0.74 | 0.84 | 0.95 | 1.05 | 1.21 | 1.42 | |
| min | 0.4 | 0.4 | 0.48 | 0.56 | 0.64 | 0.72 | 0.8 | 0.96 | 1.12 | ||
| df | 0.8 | 0.96 | 1.12 | 1.28 | 1.6 | 2 | 2.4 | 2.8 | 3.2 | ||
| U | max | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1 | 1.2 | 1.4 | |
| x | max | 0.625 | 0.625 | 0.75 | 0.875 | 1 | 1.125 | 1.25 | 1.5 | 1.75 | |
| Thread Size | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | ||
| d | |||||||||||
| P | Pitch | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | |
| b | min=nominal size | 6 | 7.2 | 9.6 | 12 | 14 | 16 | 18 | 20 | 22 | |
| max | 7.6 | 9.2 | 12.1 | 15 | 17.5 | 20 | 22 | 25 | 27 | ||
| ds | max=nominal size | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | |
| min | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 | 17.73 | 19.67 | ||
| n | Nominal Size | 0.8 | 1 | 1.2 | 1.6 | 2 | 2 | 2.5 | 3 | 3 | |
| min | 0.86 | 1.06 | 1.26 | 1.66 | 2.06 | 2.06 | 2.56 | 3.06 | 3.06 | ||
| max | 1 | 1.2 | 1.51 | 1.91 | 2.31 | 2.31 | 2.81 | 3.31 | 3.31 | ||
| t | max | 1.63 | 2 | 2.5 | 3 | 3.7 | 4.2 | 4.2 | 5.2 | 5.2 | |
| min | 1.28 | 1.6 | 2 | 2.4 | 2.8 | 3.2 | 3.2 | 4 | 4 | ||
| df | 4 | 4.8 | 6.4 | 8 | 9.6 | 11.2 | 12.8 | 14.4 | 16 | ||
| U | max | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | 4 | 5 | 5 | |
| x | max | 2 | 2.5 | 3.125 | 3.75 | 4.375 | 5 | 5 | 6.25 | 6.25 | |
Main Features
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Slotted headless screws are becoming popular due to their unique set of features that make them an ideal and excellent choice. Below are the main features of Slotted Headless Screws:
● Fully and deep threaded surface.
● Flat end and straight slot cut-out on one end.
● Property classes 5, 7, 6, 8, and 10
● ROHS and REACH compliant
● UL and cUL listed
● Available in regular thread
● Anti-corrosion
● Resistance to temperature change
Advantages Of Slotted Headless Screws
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You can avail several advantages by using Slotted Headless Screws. This is the reason why companies from different industries want Slotted Headless Screws. Below are the benefits of the top advantages of Slotted Headless Screws:
● Additional components are excluded from the joint application with Slotted headless Screws.
● It is the ideal solution for sliding strips ending with profiles.
● Slotted Headless Screws are designed to fix the exact position of parts, usually with each other.
● They have non-magnetic and long operational files.
● These screws also have enhanced Molybdenum structures
● You can install Slotted Headless Screws without nuts or washers
However, Slotted Headless Screws have more advantages, but the list mentioned above listed only the top advantages.

Applications
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Slotted Headless Screws are the most common type of screws that you can find in various items located at your home. These screws have uncountable applications. It means that they can be used for a wide range of purposes. Below are the top application of Slotted Headless Screws:
● These screws can be used to fasten two or more objects' parts.
● They can also be used in an object requiring minimum or negligible torque.
● Slotted Headless Screws can also be used to restore antique furniture, vehicles, and other types of equipment.
● These screws are also used to secure objects together. It might be within or against two or more objects.
It is impossible to list all applications here because Slotted Headless Screws are manufactured for a wide variety of uses.
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