# FR Skates Double Strap Screw M4 buckle screw, black

The FR Skates Double Strap Screw M4 buckle screw is a black screw with an M4 thread, 9 mm long, with a flat head for fixing buckles and straps on inline skates. The Anti-Loose serrations under the head and the factory Loctite adhesive keep it in place when skating on cobblestones and jumping. It often also works as a replacement in skates of other brands.

- Price: 3.00 PLN
- Brand: FR Skates
- Availability: in stock, ships within 24 h
- EAN: 3701118878129
- Page: https://bogdanca.pl/en/fr-skates-double-strap-screw-m4-buckle-screw-black.html
- As of: 2026-10-23

## Who it’s for

- The buckle on your skates works loose every few rides because the screw unscrews from vibration on cobblestones.
- You lost a buckle or strap screw and need an M4 replacement, including for skates of a brand other than FR Skates.
- You are replacing buckles or straps with coloured ones and need flat-head screws that will not damage the plastic.

## When to choose something else

- The play is in the cuff, not the buckle — separate screws are used to fix it, for example the [FR Skates Screw Cuff Igor & Daria](https://bogdanca.pl/en/fr-skates-screw-cuff-igor-daria-cuff-fixing-screw-black.html).

## Key features

- **M4 thread** — Many manufacturers use this size to fix 45° buckles and straps, so the screw also works as a replacement outside FR Skates skates.
- **Flat head (flanged)** — It presses the strap down over its whole surface and does not cut into the plastic, as the conical head of an ordinary screw does.
- **Anti-Loose serrations under the head** — Sharp serrations bite into the surface and make it harder for the screw to unscrew from vibration while you skate.
- **Factory Loctite adhesive on the thread** — A blue patch of anaerobic adhesive locks the thread further, so the buckle does not work loose on jumps and hard freeride skating.

## Specifications

| Specification | Value |
|---|---|
| Brand | FR Skates |
| Type | buckle and strap screw |
| Model | Double Strap Screw |
| Size | M4 thread, 9 mm thread length |
| Head | flat (flanged), Phillips cross socket |
| Locking | Anti-Loose serrations under the head, factory Loctite adhesive |
| Compatibility | 45° buckles and straps fixed with an M4 screw, including skates of other brands |
| Colour | black |

## Questions and answers

### Does this screw fit skates of brands other than FR Skates?

In many cases yes, because the M4 thread is a common standard for 45° buckles and straps. Measure the old screw before buying: this one has a thread length of 9 mm.

### How does it differ from an ordinary M4 screw from a hardware shop?

The flat head and the thread locking. An ordinary screw often has a conical head that damages the strap and a smooth underside, so it unscrews from vibration; this one has serrations under the head and factory Loctite adhesive.

### How tightly should I tighten it?

Until you feel clear resistance, with a Phillips screwdriver. Do not force it — the serrated flange and the adhesive will hold the joint, and too much force can damage the plastic.

### Will you choose a screw for my skates in the shop?

Yes. Bring the skate or the old screw to our shop in Poznań or Wrocław and we will compare the thread and length.

### Can I return the screw if it does not fit?

Yes, you have 14 days to withdraw from the contract (return). The buyer covers the return shipping.

## Buying

- Delivery: from 15.00 PLN, in-store pickup in Poznań and Wrocław free of charge
- Returns: 14 days
- Seller: Bogdanca Sp. z o.o.