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Pozi Mushroom Head Captive Screws

SKU: CP44 Categories: ,

Pozi Mushroom Head Captive Screws, otherwise known as Pozi Truss Head Reduced Thread Captive Screws, feature a Cross Recess drive and a wide dome-shaped head.

Captive screws host an unthreaded portion below the head that prevents full removal from their target housing – often used to secure safety and inspection covers, as well as for other safety applications and those where regular maintenance is required.

Pozi drives are an improved version of the traditional Phillips drive with four wings in each corner – installed and partially removed with a Pozi screwdriver or insert bit. This reduces the likelihood of cam-out and enables higher torque to be achieved.

The mushroom head offers a low-profile design which protrudes slightly from its target housing – ideal for applications that have space restrictions or limited clearance. We supply a wide variety of Captive Screws suitable for most applications and assemblies.

Pozi Mushroom Head Captive Screws are manufactured from A2 Stainless Steel as standard, with other materials and finishes available to order.

Available at Fastenright in thread sizes from M3 to M8 as standard, with lengths from 8mm to 40mm. Optional thread locking patches are also available on request.

Bespoke sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and custom parts made to drawings – minimum order quantities apply.

Pozi Mushroom Head Captive Screws Technical Drawing

d1 and L1 dimensions can be to customer specification.

Technical Data & Available Sizes
Thread Diameter M3 M4 M5 M6 M8
dk (mm) 6.9 9.4 11.8 14 17.8
k (mm) 1.9 2.5 3.1 3.7 4.8
d1 (mm) 2.2 3 3.9 4.6 6.3
L1 (mm) 4 5 6 8 10
Available Sizes (L) M3 M4 M5 M6 M8
8mm red icon image  
10mm red icon image red icon image
12mm red icon image red icon image red icon image red icon image
16mm red icon image red icon image red icon image red icon image red icon image
20mm red icon image red icon image red icon image red icon image
25mm red icon image red icon image red icon image
30mm red icon image red icon image
40mm red icon image
red icon image = A2 Stainless Steel
Size not listed? Please enquire – we may be able to provide it.

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