Push-on fasteners are also known by the names to push-on retainers or push-in fasteners. These are hardware components that allow other components to securely and quickly assemble onto a smooth shaft. These fasteners feature radial teeth that are present at an angle perpendicular to the shaft. This angle permits the fastener to slide onto the shaft in a single direction and resists motions in the opposite direction. This gives sliding resistance to the assembly.
This attachment technique is quite similar to the barbs on fish hooks. During assembly, the push-on fastener slides very easily and offers immediate holding power. Some other names are also used for push-on fasteners that include push-on, Push-on fix, quick lock washer, hub nuts, and axle washer.
Types of Push-On Fasteners
Push-On Nuts
These are the most commonly used Push-On fasteners available in the market. Some other names used for these are external fishing washer, star lock washer, and pus-on retainer. It is crucial that the material of the shaft is softer than the nut.
Push-On Hat Retainers
This type of fastener features a hat that is present on the end of a shaft or rod and offers some aesthetic and protective advantages. This is also known by the names washer cap push nut, cap nut, and hammer cap push nut.
Speed Nut
Speed nuts quickly slide down a shaft and then are locked in that place with the help of radial motion that is applied to self-threading characteristics.
Push-On Bolt Retainer
Push-on bolt retainers usually slide onto screws and bolts to keep them in one position in a panel or other such assemblies. This is done while installing a traditional nut.
Manufacturing Material
A lot of push-on fasteners are made from spring steel. There are some other materials used as well such as stainless steel, aluminium, bronze, and plastic. Different materials suit different operating conditions. The coatings and finishes that are found on push-on retainers include passivation, zinc plating, and enameling.
Specifications
The pole or shaft configuration is a significant thought. A tight shaft measurement resilience regularly .002 for little shafts and .004 for bigger shafts, guarantees that essential holding power will be provided by the push nut. The rod material priority satisfactory hardness yet does not surpass a worth that forestalls the locking teeth to dive in (like 78 on Rockwell 30T scale.) Also, shaft shorts should be rounded or chamfered to permit fast and simple mounting of the push retainer.
How to Choose the Best Push-On Fastener for a Stud?
Sheared Push-On Fasteners
These are also known as PS style push-on and consist of inner teeth that are flexible and allow them to fit larger and round stud sizes. The panels will remain intact as these nuts are locked into position for a vibration-free assembly.
They are ideal for smaller devices and can either be pre-assembled or placed along the assembly line.
Serrated Push-On Fasteners
Serrated push-on fasteners consist of serrated teeth that can handle many stud size variations. You can simply slide them onto the threaded studs, rods, etc. Serrated fasteners in such cases will grip tight to prevent the panels from breaking apart. They designed in one piece and do not need any extra components which saves a lot of costs.
Insert Push-On Fasteners
PN Style Insert Push-On span Style Insert Push-On Fasteners or Round Type Push Nuts slide and nibble into position with negligible exertion. Utilized over unthreaded studs, nails, tubing, or shafts, Insert Push-Ons have a huge bearing surface so they can be introduced with a computerized assembly or pre-collected to trim pieces.
Round Type Push Nuts come in level, 2,4, and 6-prong styles. And have a position of a safety plan that is ideal for small, lightweight applications.
Rectangular Push-On Fasteners
These also known as flat type push nuts that can used in place of lock washers and standard threaded nuts as they securely lock into position when they pressed onto the shaft, stud, etc. They offer a vibration-proof attachment on thin or thick panels.
Retaining Rings
PG Style Retaining Rings Retaining Rings Thin Walls Push-On Fasteners or Thin Walls don’t have inward teeth, yet smooth unbending steel inside that gives high maintenance when applied over unthreaded studs or shafts. Planet Thin walls slide effectively into the right spot with apparatuses, or the stud can be driven into the latch.
PG Style Retaining Rings have a very low profile plan which makes them ideal for applications on electronic and mechanical gadgets. Thin Walls are really lightweight, however, hold like a heavyweight.
After knowing about the basic and different types of push-on fasteners. It is easy to determine which one will best suit your applications.