Slotted Countersunk Reduced Thread Captive Screws

Slotted Countersunk Captive Screws are the perfect combination between a flat-headed countersunk screw and a captive shank.

This captive shank is also referred to as a reduced thread.

Importantly, the screw complies with the EU safety directive regarding machine guards.

They are also used to fasten sheet metal or captive panels, which are held in place between the head of the screw and a captive washer, which prevents full removal.

Available from Fastenright in both A2 and A4 Stainless Steel as standard, with optional thread locking patches available.

Sizes available from M1.6 to M10, with lengths ranging from 8mm to 120mm.

Non-standard sizes and materials are available to order, including custom parts made to drawings.

d and L1 dimensions can be to customer specification.

Thread Diameter	M1.6	M2	M2.5	M3	M3.5	M4	M5	M6	M8	M10
DK (mm)	3	3.8	4.7	5.6	6.5	7.5	9.2	11	14.5	18
d1 (mm)	1.12	1.4	1.8	2.2	2.6	3	3.8	4.5	6.2	8
K (mm)	0.4	1.3	1.5	1.9	1.9	2.2	2.5	3	4	5
L (mm)	8	10	10	14	16	18	22	25	35	45
L1 (mm)	3.2	4	4	6	7	8	10	12	16	20
t (mm)	0.45	0.6	0.6	0.85	1	1.1	1.3	1.6	2.1	2.6
N (mm)	0.4	0.5	0.5	0.8	0.8	1	1.2	1.6	2	2.5
Available Sizes	M1.6	M2	M2.5	M3	M3.5	M4	M5	M6	M8	M10
6mm
8mm
10mm
12mm
14mm
16mm
18mm
20mm
22mm
25mm
30mm
35mm
40mm
45mm
50mm
55mm
60mm
65mm
70mm
75mm
80mm
90mm
100mm
110mm
120mm
= Available Size not listed? Please call to discuss – we may be able to provide it.