When installed on a thin panel, the retaining flange provides a threaded hole for the captive screw. Zinc Flake coated high tensile steel class 10 - a higher tensile non-stainless grade for screws and bolts. It has a very high strength:weight ratio and is used in aerospace, power generation, and medical industries (among others). On a captive screw the middle section has a reduced diameter which is important to its functionality.

Thumbscrews products | MISUMI South East Asia

I recently came across the Open Source Optics collection by jpearce (it's really great, you should check it out: http://www. Also available to purchase online are threaded washers and retaining flanges for captive screw installation on thin or non-threaded panels. This is advantageous because the captive screw remains in the panel, so the risk of losing a component is minimised, and the panel can be re-mounted easily and quickly.I'm used to SAE sizes like 1/4-20 (1/4" diameter, 20 TPI) or 1/4-32 (1/4" diameter, 32 TPI), and have seen other 1/4-x sizes listed as well. A good selection of accessories such as screws, bolts, washers and nuts that you may need for your daily engineering usage. A large variety of goods for every kind of factories and offices including Protection items, Cleaning supplies, sanitations, office supplies and more.

m3 Thumb Screws | Farnell UK m3 Thumb Screws | Farnell UK

Knurled Captive Shouldered Thumb Screws are a variant of the thumb screw to DIN 464 standard but instead host a reduced thread, or unthreaded portion, below the head of the fastener. The captive screw should then be screwed into the flange until the reduced diameter section is reached. Several options available; the first two options offer easy assembly with bolts and nuts, with a single hammer-stroke.

Thread Size_1/4"-20 Length_3/4" Threading_Fully Threaded Head Diameter _1 1/2" Height_15/32" Screw Size Decimal Equivalent_0. Most importantly, 'x', the space between the two threaded areas in the application should be greater than the thread length (l 2) of the captive screw. Thumb screws are available in a shouldered versions known as knurled thumbscrews and full threaded versions. The other option made from Stainless Steel AISI 303 - the visible face find turned with a matte, shot-blasted finish. Captive screws are suitable for a range of applications, but are most often found in highly precise engineering environments.