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Business Insider points out that between 2000 and 2010, there were more than 10,000 reported cases of people swallowed parts of pens or pencils. Show comments Advertisement
Find out what a hole in a pen cap means and what it does for both you and your pen. The post If You See a Hole In a Pen Cap, This Is What It Means appeared first on Reader's Digest.
The tapped hole (or nut) into which the screw fits, has an internal diameter which is the size of the screw minus the pitch of the thread. Thus, an M6 screw, which has a pitch of 1 mm, is made by threading a 6 mm shank, and the nut or threaded hole is made by tapping threads into a hole of 5 mm diameter (6 mm − 1 mm).
[4] [12] Polypropylene is used instead of polystyrene because it absorbs impact better, reducing the chance of the pen cracking or splitting if it is dropped onto the cap. [ 13 ] The pen's dimensions are 5 + 7 ⁄ 8 by 1 ⁄ 2 inch (14.9 cm × 1.3 cm) with the cap, [ 11 ] or 14.5 cm × 0.7 cm ( 5 + 11 ⁄ 16 in × 1 ⁄ 4 in) without the cap.
Iron gall ink. Iron gall ink (also known as common ink, standard ink, oak gall ink or iron gall nut ink) is a purple-black or brown-black ink made from iron salts and tannic acids from vegetable sources. It was the standard ink formulation used in Europe for the 1400-year period between the 5th and 19th centuries, remained in widespread use ...
Pen Cap Holes. Surprising Use: Saving lives. Because seemingly everyone likes chewing on something while they think or write, which is how roughly 100 Americans die each year from choking on pen caps.
In 1913, Woolley and Meredith defined them like Anthony, but gave the following dimensions: hex head cap screws up to and including 7 ⁄ 16 inch (11.1125 mm) have a head that is 3 ⁄ 16 inch (4.7625 mm) larger than the shank diameter; screws greater than 1 ⁄ 2 inch (12.7 mm) in diameter have a head that is 1 ⁄ 4 inch (6.35 mm) larger than ...
Nut (hardware) An M4 nut threaded onto an Allen key socket head screw. A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads' friction (with slight elastic deformation), a slight ...