This document discusses simple mechanical parts used to join objects. It describes nuts, which have threaded holes, and bolts, which have external threads, that are used together. Several types of nuts are described, including hex nuts, wing nuts, and flange nuts. Common sizes and materials for nuts and bolts are discussed, along with their manufacturing processes and common uses to join infrastructure and in various industries. Finally, some manufacturers of nuts and bolts are listed.

1. SIMPLE MECHANICAL PART
 Introduction
 Types of Nuts
 Types of Bolts
 Sizes of Nut & Bolt
 Material & Manufacturing
 Uses
 Manufacturers

2. INTRODUCTION
 Nuts are always use as a conjunction with bolt to fasten multipleparts together.
(Fastener- Joins two or more objects together).
• Nut is a type of fastener with a
threaded whole.
• It is female threaded part of nut
and bolt.
• Bolt is a form threaded fastener
with an external thread.
• it is a male threaded part of the
nut and bolt.

3. A square sided nut A six sided nut
Square nut Hex nut Wing nut
A nut with wings to hand
tightening.
Cap or Acron nut
Nut that has a domed shaped
at one side.
Flange nut
Nut that has a wide flange at
one end
Nylon insert lock nut
A nut with a nylon insert to
prevent backing off.

4. TEE Bolt
Stud Bolt
Expansion Bolt
U-Bolt Hexagonal Bolt
Usually hexagonal nut &
bolt are always use

5. Nuts comes in many sizes. This one is
the part of Sydney Harbour Bridge.

6.  Carbon steel and Alloy steel material used for Nut and Bolt manufacturing.
 Nut manufacturing by blanking and threading. Bolt by forging and
threading.
 Insulation coatings or paints to prevent corrosion.
Insulation coating Nut &Bolt

7.  Used in big infrastructures of steel, wooden, etc.
 It’s design makes them easy to assemble and disassemble.
 In most industries, it made of steel, plastics etc. These materials are strong and resistant
to corrosion.

8. Screw Expert
BDN Fasteners (INDIA)
Super Screws
Star Steel Works
STL Fasteners
Pioneer Nuts & Bolts

9. Made by Shashwat S.Paulzade
Roll no. 65