Why bolts are hexagonal

The stud is used in place of a bolt, when there is insufficient space to accommodate the bolt-head or to avoid use of an unnecessarily long bolt. Studs are commonly used to connect cylinder covers to engine cylinders. Machine screws. Machine screws are uniformly threaded bolts having nominal diameter less than quarter inch and tightened by a nut, used to fasten various components together in machines, tools, etc.

Machine screw. Cap screws. This is screw having a shank threaded throughout its length and is usually tightened in a tap made in the machine.

Cap screw. Wood screws. Any of the screw having slotted head so that it can be tightened by a screw driver in to wood is known as wood screw. Foundation bolts. These bolts are made from mild steel or wrought iron rods for fixing heavy machines in the ground. The size of the bolt depends on he size of the machine. These bolts are placed in cement concrete so that they are permanently fixed in the ground. Foundation bolt. Site news.

Orhtographic Projections of Machine comp Types of rivet heads and riveted joints, Threads nomenclature, profiles, multi st Nuts and bolts- square headed, hexagonal Computer Aided drawing. Numeric control systems. Nuts and bolts- square headed, hexagonal, types of lock nuts, studs, machine screws, cap screw and wood screw, foundation bolts 8.

Introduction The bolt and nut joint or screwed fastening is a temporary joint. Nuts and bolts A nut is an internally threaded component joined to the externally threaded bolt.

Bolts and Nuts 8. Nuts Nuts are generally in the form of hexagonal or square prisms. Hexagonal nut The upper corners of this nut are rounded-off or chamfered. Hexagonal Nut 8. Square nut The upper corners of the square nut are also chamfered in the same manner as those of the hexagonal nut.

Square Nut 8. Bolts A bolt comprises of two parts a shank and a head. Hexagonal-headed bolt This is the most common form of a bolt. Hexagonal Bolt 8. Square-headed bolt This bolt is generally used when the head is to be accommodated in a recess. Square Bolt 8. Types of lock nuts In a bolted joint, the nut may become loose, due to vibration. Jam Nut or lock nut. This is about one half or two third thickness of standard nut. Types of Lock Nuts Castle nut. Types of Locking 8. Studs The stud is a cylindrical shank threaded at both ends.

Is the contact area really significantly different if there is a gap between the wrench and the nut as the area of contact is only along an edge? There is however a significant increase in the difference between the diametrically opposite edges and the spacing between the wrench faces as the number of sides on the nut is decreased.

Just think of the number of nut sides increasing and tending towards being circular. That language is imprecise. It's about how much metal is resisting 'rounding over' but I'm not sure what the better name would be. It isn't really shear area either And then stopped the cost of replacing the broken glass from the miscreant's wages.

And when the miscreant had finished working "for free", dismissed him with no notice and no references. No HR departments back in those days! Dave Tweed Dave Tweed 6, 1 1 gold badge 16 16 silver badges 33 33 bronze badges. Since the clearance required between the wrench and the nut is pretty constant regardless of number of sides, the closer that tolerance is to the radial 'runout' the more chance of rounding the corner.

Because a wrench only makes contact at the corners, the length of the side shouldn't have much to do with it. Since the clearance is constant, the number of sides has a strong effect on the force at the corners. What I'm getting at is that the force is only applied at the points, not along the face so it's all about the angle that force is transmitted at and how much metal there is in that direction. More sides means both a more oblique line of action and less material in that direction.

Also older fasteners predating mass production are more likely to be square. Chris Johns Chris Johns 15k 3 3 gold badges 19 19 silver badges 42 42 bronze badges.

Hex nuts have the advantage of being standardized to fit most tools and other fasteners. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

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