1/4" UNC photo thread screw round head 1 1/2"

1/4" UNC photo thread screw, round head, 1 1/2", small but indispensable in the studio

It’s easy to overlook until exactly one is missing: this 1/4" UNC photo thread screw with round head and 1 1/2" thread length is exactly the kind of inconspicuous accessory that truly completes your camera and tripod setup. You use it to securely fasten cameras, quick-release plates, accessory rails or brackets—no wobble, no improvisation, just a clean, precise fit.

Precise 1/4" 20 UNC photo thread for compatible camera mounts

At its core is the classic 1/4" 20 UNC photo thread you know from most cameras, tripod heads and accessories. This thread is the standard in photography and ensures that the screw goes in smoothly and holds securely. The thread direction is, as usual, right-handed, so you don’t have to retrain your muscle memory when switching between different screws and adapters.

The thread length up to the head is 1 1/2", allowing you to securely fasten slightly thicker plates, brackets or accessories without the screw being too short. Especially when working with custom setups, cages or special clamps, this extra length is often exactly what’s missing.

Round head with compact dimensions, unobtrusive yet well thought-out

The screw head is designed as a round head, which makes it comfortable to grip while ensuring it blends discreetly into your gear visually. With a head height of about 0.132" (around 3.32 mm) and a head diameter of approx. 0.437" (about 11 mm), the head remains compact enough to stay out of the way, yet still offers enough surface area for stable seating and reliable force transfer when tightening.

Especially in photo and video setups where space is tight—on slider platforms, in cages or on densely packed rigs—this compact head shape really pays off. Nothing sticks out excessively, nothing snags unnecessarily on bags or cables.

Durable 18-8 stainless steel for continuous use

The screw is made from 18-8 stainless steel. For you, that means high corrosion resistance, solid strength and a surface that doesn’t immediately look worn even after frequent tightening and loosening. Whether you’re working outdoors in damp conditions, experimenting with changing setups in the studio, or constantly moving the screw between different components, it’s built for exactly that.

We’d call it a typical “mount it once and then forget about it” component. It simply does its job without drawing attention to itself.

5/32" hex socket, precise tightening with the right tool

To tighten the screw, a 5/32" hex key is used. The hex socket in the head ensures that you can tighten the screw firmly and in a controlled manner without damaging the head or slipping. This is a real advantage, especially with delicate camera or tripod plates, because you don’t have to resort to improvised tools.

However, there is one important point we explicitly want to mention: this is an imperial tool size. You therefore need a dedicated 5/32" hex key, which is not included. With the right key, the screw sits cleanly and without play, without giving you the feeling that the tool is “wobbling” around in the head.

For photo and video setups that just need to work

Whether you’re fixing a camera to a plate, securing a bracket to a rig, or mounting accessories such as monitors, slider adapters or small clamps, this 1/4" UNC photo thread screw with round head is designed for exactly these kinds of applications. It fits many typical photo and video uses where the 1/4" 20 UNC photo thread is the standard.

So if you’re tired of wobbly makeshift solutions, screws that are too short or a random assortment of leftovers, this cleanly manufactured round head screw is a solid, no-fuss solution. No frills, no marketing fireworks—just a reliable stainless steel screw that holds your gear together where it matters.