NUTS AND LOCKING DEVICE ISSAM AL-BELTAJI KAU
JOINTS
MOVABLE JOINT
FIXED JOINT
PERMENENT FIXATION
WELDING
RIVITS
TEMPERORY FIXATION BOLTED JOINT
SHAFT
GEARS
OTHERS
WHAT IS THE NUT? • A nut is a thick metal ring which you screw onto a metal rod called a bolt. Nuts and bolts are used to hold things such as pieces of machinery together.
WHAT IS THE LOCKIN DEVICE? • Locking device is a device used to secure a nut and prevent it working loose or to moving from its place
TYPES OF NUTS • There are more many types of nuts used in various field.
OTHER TYPES OF NUTS.
TYPES OF LOCKING DEVICE. Locking devices available include nuts, clips, keys and washers.
THIS NUTS ALSO LOCKIN DEVICE.
Elastic stop nuts With this type of device there is a slot inside the nut above the thread which holds a fiber or nylon ring. As the nut is tightened down, this insert is deformed by the bolt thread and the very high degree of friction between the thread and the insert prevents the nut loosening. Elastic stop nuts are frequently used to secure electrical equipment such as transformers or loudspeakers.
DID YOU REMEMBR NYLON INSERT LOCK NUT ??
• Spring lock washers
Tooth lock washers
Spring nuts
Circlips
O-rings
Cotter pins
Round nut
locknut •in which the threads are deformed after cutting.
special tab is bent to secure the nut.
American Society for Testing and Materials (ASTM), Alloy & Carbon Steel Nut Materials Specifications:
ASTM A194 Grade A- Low Carbon, Non-Heat Treat, Heavy Pattern ASTM A194 Grade C- Recommended use with A325 Structural Bolts, Lock Nut Spec. ASTM A194 Grade GT- Automation Flange Lock Nut, C1022-1045 SteelGrade 2- Low Carbon, Non- Heat Treat, Finished Pattern ASTM A194 Grade 2H-Recommended use with A325 Structural Bolts, High Pressure & High Temp. ASTM A194 Grade 2HM-Grade 5ASTM A194 Grade DH- Recommended use with A490 Type 1 Structural Bolts ASTM Grade DH3- Recommended use with A490 Type 3 Structural BoltsGrade 8ASTM A194 Grade F- Large Flange Nut, AISI 1008-1035 steel ASTM A194 Grade 4ASTM A194 Grade L7-ASTM A194 Grade L7M-Stainless SteelASTM A194 Grade 8-Series Stainless Steel, Heavy Pattern ASTM A194 Grade 8M- 316 Series Stainless Steel, Heavy Pattern
METRIC NUT SIZE
Organizations for Standardization • • • • • •
ASME - American Society of Mechanical Engineers IFI - Industrial Fastener Institute ISO - International Organization for Standardization ANSI - American National Standards Institute DIN - Deutsches Institut fur Normung JIS - Japanese Industrial Standard
THANK YOU FOR:
• DR. AHMAD KHAIRY ABDELLATIF. • DR. MAMDOH ALGENDY.
THE END