# Steel screw post 4 mm (100 pcs) – Black: 4 mm

- **Brand:** Pet Hardware®
- **SKU:** SPH-4 BK
- **EAN:** 8595109526381
- **Category:** Rivets & Screws > Chicago Screws
- **Material:** Steel
- **Surface finish:** Matte black
- **Size:** 4 mm
- **Weight:** 160 g
- **Minimum order:** 1 packs
- **In stock:** Yes


## Description and construction

Metal Chicago screws are used for making belts, collars, or for joining materials. They consist of two parts – a hollow screw with an internal thread and a solid head that acts as a closed nut, and a matching screw for tightening the connection. The advantage of a screw connection is quick and easy handling, for example when replacing a belt buckle or joining two materials. The listed price is for the entire pack (100 pcs)!

How to choose the correct screw length?

Whether you are joining leather, webbing, or another material, the key factor is the material thickness. The correct size of a Chicago screw is when the length of the screw post (value B in the table) is 2 mm shorter than the total thickness of the joined materials.

TIP: To ensure a 100% solid connection it will suffice to apply a drop of thread locking adhesive to the screw #1918997.


## Limits and maintenance

* Handles typical outdoor conditions without issue — rain, mud, moisture, sweat. No need to dry or treat specially after every water contact.
* Reliably protects the underlying material during typical outdoor use — rain, dew, occasional wetting. May not be sufficient for permanently wet environments.
* Resists daily use even with active dogs. The surface holds its original appearance for a long time, even when in contact with straps, snaps or other hard surfaces.
* Over time loses its original gloss and the tone changes slightly. This does not affect function, but the surface eventually does not look as fresh as at the start.


## Parameters

| Parameter | Value |
|---|---|
| Post Length | 4 mm |
| Outer diameter of post | 4 mm |
| Head diameter | 10 mm |
| Screw Length | 3 mm |
| Quantity per Pack | 100 |

## Pricing (USD)

| Quantity | Excl. VAT / packs | Incl. VAT (21 %) / packs | Price type |
|---|---|---|---|
| 1 packs | 10.506 USD | 12.712 USD | Package tier |
| 10 packs | 9.455 USD | 11.441 USD | Carton tier |



*Prices incl. VAT apply to EU end customers. EU VAT-registered businesses and export orders are priced excl. VAT — see cart or ?currency= for your case.*



## Compatible products

* **O Ring – Black (25 mm):** SKU 8W/25 BK
* **D ring – Black (26 mm):** SKU 4520/26 BK
* **Metal Tri glide – Black (25 mm):** SKU Z4013/25 BK
* **Double Bar Collar Buckle – Black (25 mm):** SKU XGJ/25 BK
* **Belt buckle 40 mm – Matte Black:** SKU Z4430/40 BK
* **Solid Brass Belt Buckle 35 mm – Matte Black:** SKU B1049/35 BK


## Available size variants (series SPH-4 BK)

* 4 mm: SKU SPH-4 BK (this product)
* 5 mm: SKU SPH-5 BK
* 6 mm: SKU SPH-6 BK
* 8 mm: SKU SPH-8 BK
* 10 mm: SKU SPH-10 BK



## Links

- Product page: https://www.pethardware.com/en/screw-posts/steel-screw-post-4-10mm-100-pcs-matte-black-5749/
- Category: https://www.pethardware.com/en/screw-posts/
- How to choose the right chicago screw length: https://blog.pethardware.com/en/how-to-choose-chicago-screws/