What Is a Female Screw Called?
Many buyers confuse female screws with nuts or inserts.
A female screw is usually called a nut or threaded insert. It receives a male threaded fastener.
I often get RFQs where clients mistakenly ask for “female bolts” or “hollow screws.” Knowing the right term speeds up sourcing and avoids miscommunication.
What Is a Mating Screw?
Many engineers misunderstand mating screws. That slows down design approval or leads to wrong orders.
A mating screw works with a sex bolt or barrel nut. It forms a two-part fastening system.
Mating screws are usually used in architectural fittings, furniture, and assemblies where both sides of the connection are visible.
Mating Screw Assembly Components
| Component | Function | Appearance |
|---|---|---|
| Mating Screw | Enters from the front side | Has standard or flat head |
| Barrel Nut | Receives the mating screw | Threaded sleeve or cylinder |
We supply custom mating screw sets with various materials—stainless, brass, carbon steel. Clients often request logo engraving or anti-corrosion coatings.
In one case, a German client needed mating fasteners for outdoor panels. We provided ISO-certified sets with 72-hour salt spray resistance—delivered in 14 days.
What Is Butterfly Screw Called?
Non-standard screw heads confuse many buyers. I often hear questions like “Is that the one with wings?”
A butterfly screw is commonly called a “wing screw” or “wing bolt.” It can be tightened by hand.
This fastener has “wings” on its head, making it ideal for manual operations. No tools are needed. It’s used in electronics, machinery covers, and display systems.
Typical Wing Screw Uses
| Application | Why Use a Wing Screw? |
|---|---|
| Machinery covers | Quick removal by hand |
| Light fixtures | Frequent adjustments needed |
| Display panels | Tool-free assembly |
At Prime, we’ve shipped wing screws to clients in the exhibition and stage hardware industry. We offer bulk wing screws in stainless steel, zinc-plated, and black oxide finishes.
If you need tool-free assembly hardware, wing screws are a top choice. We also provide matching nuts to simplify sourcing.
What Is a Screw With No Head Called?
This question is common among maintenance engineers. Screws without heads cause confusion in drawings or repairs.
A screw with no head is called a “set screw.” It sits flush or inside the material.
Set screws are used to lock parts on a shaft or inside a collar. They rely on pressure, not external gripping.
Set Screw vs Regular Screw
| Feature | Set Screw | Regular Screw |
|---|---|---|
| Has Head | No | Yes |
| Application | Shaft locking | General fastening |
| Tool Used | Allen wrench | Driver or socket |
One US client ordered M6 set screws for their CNC couplings. We provided full inspection reports with each batch, confirming hardness, thread pitch, and surface finish.
We also offer set screws in stainless steel, alloy steel, and brass, with optional nylon patches for vibration resistance.
What Is the Female Part of a Bolt Called?
Many buyers search for the “female bolt” and end up with incorrect hardware.
The female part of a bolt is called a “nut.” It has internal threads and works with a male-threaded bolt.
Different types of nuts exist for different load, torque, and vibration environments. Choosing the wrong nut leads to system failure.
Common Nut Types
| Nut Type | Best Use | Feature |
|---|---|---|
| Hex Nut | Standard connections | Most common shape |
| Lock Nut | Vibrating machinery | Nylon insert or distortion |
| Flange Nut | Auto and machinery | Built-in washer |
We’ve helped clients choose between DIN, ANSI, or JIS standard nuts. Our production lines deliver metric and imperial size nuts with tight tolerances.
We also offer threaded inserts for plastics or soft metals—perfect for electronics and automotive applications.
Conclusion
A “female screw” is a nut or threaded part. Choosing the right type ensures secure, lasting connections.
Need female fasteners for your project?
At Prime, we help you source the right nut, insert, or mating part—fast and accurately.
🧩 Custom threaded inserts and nuts available
📦 Stable lead times, full certifications
🔍 Detailed inspection before every shipment
📩 Send your inquiry now to get free technical support and a fast quote!
