Podcast
Questions and Answers
What material is the AN320-10 nut made of?
What material is the AN320-10 nut made of?
What is the diameter of the AN310D5R nut?
What is the diameter of the AN310D5R nut?
How many threads per inch does the AN320-10 nut typically have?
How many threads per inch does the AN320-10 nut typically have?
Which characteristic of the AN350B1032 nut identifies its compatibility with a specific bolt size?
Which characteristic of the AN350B1032 nut identifies its compatibility with a specific bolt size?
Signup and view all the answers
What type of thread does the AN310D5R nut have?
What type of thread does the AN310D5R nut have?
Signup and view all the answers
What is the primary safety feature of the castle nut, AN310?
What is the primary safety feature of the castle nut, AN310?
Signup and view all the answers
In what application would a castellated shear nut, AN320, be most appropriately used?
In what application would a castellated shear nut, AN320, be most appropriately used?
Signup and view all the answers
What is the main purpose of self-locking nuts in aircraft applications?
What is the main purpose of self-locking nuts in aircraft applications?
Signup and view all the answers
Which of the following nuts requires an auxiliary locking device for its use?
Which of the following nuts requires an auxiliary locking device for its use?
Signup and view all the answers
Which type of self-locking nut is represented by the elastic stop nut?
Which type of self-locking nut is represented by the elastic stop nut?
Signup and view all the answers
What is a characteristic feature of self-locking nuts?
What is a characteristic feature of self-locking nuts?
Signup and view all the answers
How does the spring in a Boots self-locking nut function?
How does the spring in a Boots self-locking nut function?
Signup and view all the answers
Which of the following is a common application for self-locking nuts?
Which of the following is a common application for self-locking nuts?
Signup and view all the answers
What major restriction is advised regarding the use of self-locking nuts?
What major restriction is advised regarding the use of self-locking nuts?
Signup and view all the answers
Which nut is specifically limited in use on aircraft structures due to requiring an auxiliary locking device?
Which nut is specifically limited in use on aircraft structures due to requiring an auxiliary locking device?
Signup and view all the answers
What is a key characteristic of the Boots self-locking nut?
What is a key characteristic of the Boots self-locking nut?
Signup and view all the answers
What distinguishes the wing nut, AN350, from other types of nuts?
What distinguishes the wing nut, AN350, from other types of nuts?
Signup and view all the answers
What is true about the reuse of Boots self-locking nuts?
What is true about the reuse of Boots self-locking nuts?
Signup and view all the answers
Which statement about the plain check nut, AN316, is correct?
Which statement about the plain check nut, AN316, is correct?
Signup and view all the answers
Which spring styles are available for Boots self-locking nuts?
Which spring styles are available for Boots self-locking nuts?
Signup and view all the answers
What must be ensured when attaching plates to the structure?
What must be ensured when attaching plates to the structure?
Signup and view all the answers
What is the primary function of an elastic stop nut?
What is the primary function of an elastic stop nut?
Signup and view all the answers
Which materials are commonly used to manufacture elastic stop nuts?
Which materials are commonly used to manufacture elastic stop nuts?
Signup and view all the answers
What should be done if a reused elastic stop nut can be turned with fingers?
What should be done if a reused elastic stop nut can be turned with fingers?
Signup and view all the answers
At what temperature does the self-locking action of an elastic stop nut begin to decline?
At what temperature does the self-locking action of an elastic stop nut begin to decline?
Signup and view all the answers
What characteristic must flat end bolts, studs, or screws possess when used with elastic stop nuts?
What characteristic must flat end bolts, studs, or screws possess when used with elastic stop nuts?
Signup and view all the answers
Which type of nut is not acceptable for use in aircraft structures due to reliance on friction?
Which type of nut is not acceptable for use in aircraft structures due to reliance on friction?
Signup and view all the answers
What is the advantage of using removable self-locking nuts in channels?
What is the advantage of using removable self-locking nuts in channels?
Signup and view all the answers
What type of nuts are suited for use with standard and sheet metal self-tapping screws in non-structural locations?
What type of nuts are suited for use with standard and sheet metal self-tapping screws in non-structural locations?
Signup and view all the answers
What materials are aircraft nuts primarily made from?
What materials are aircraft nuts primarily made from?
Signup and view all the answers
Which type of nuts requires external locking devices for their safety?
Which type of nuts requires external locking devices for their safety?
Signup and view all the answers
Which of the following is NOT a type of non-self-locking nut?
Which of the following is NOT a type of non-self-locking nut?
Signup and view all the answers
How can the type of self-locking nut be identified?
How can the type of self-locking nut be identified?
Signup and view all the answers
What is a key characteristic of self-locking nuts?
What is a key characteristic of self-locking nuts?
Signup and view all the answers
Which option describes a non-self-locking type of nut?
Which option describes a non-self-locking type of nut?
Signup and view all the answers
What distinguishes self-locking nuts from non-self-locking nuts?
What distinguishes self-locking nuts from non-self-locking nuts?
Signup and view all the answers
What type of threads can aircraft nuts have?
What type of threads can aircraft nuts have?
Signup and view all the answers
What material are speed nuts primarily made from?
What material are speed nuts primarily made from?
Signup and view all the answers
Which part number is assigned to the castle nut?
Which part number is assigned to the castle nut?
Signup and view all the answers
What does the letter 'D' indicate in a part number designation?
What does the letter 'D' indicate in a part number designation?
Signup and view all the answers
Which of the following is a commercial type of high-strength internal or external wrenching nut?
Which of the following is a commercial type of high-strength internal or external wrenching nut?
Signup and view all the answers
What do the last two digits of the part numbers for self-locking nuts refer to?
What do the last two digits of the part numbers for self-locking nuts refer to?
Signup and view all the answers
What designation is given to the wing nut?
What designation is given to the wing nut?
Signup and view all the answers
What is a characteristic feature of speed nuts?
What is a characteristic feature of speed nuts?
Signup and view all the answers
Which part number indicates a fiber locknut?
Which part number indicates a fiber locknut?
Signup and view all the answers
Study Notes
Aircraft Nuts
- Aircraft nuts come in various shapes and sizes
- Made of cadmium-plated carbon steel, stainless steel, or anodized 2024T aluminum alloy
- May have right-hand or left-hand threads
- No identifying markings or lettering on nuts
- Can be identified by metallic luster or color (aluminum, brass, insert), or construction
- Divided into two groups: non-self-locking and self-locking
Non-Self-Locking Nuts
- Require external locking devices for safety (e.g., cotter pins, safety wire, locknuts)
- Common types include: plain nut, castle nut, castellated shear nut, plain hex nut, light hex nut, and plain check nut
Self-Locking Nuts
- Contain built-in locking features
- Used for applications where safety is paramount despite vibration
- Common applications include attachment of antifriction bearings, control pulleys, accessories, anchor nuts, and small tank installations
- Acceptable for use on certified aircraft (with manufacturer restrictions)
- Two general types: all-metal (e.g., Boots self-locking, stainless steel self-locking) and fiber-lock (e.g., elastic stop nut)
Boots Self-Locking Nut
- All-metal construction, designed for use in high-vibration environments
- Two sections (locking nut and load-carrying nut) connected by a spring
Stainless Steel Self-Locking Nut
- Two-part construction (case with beveled locking shoulder and key, and thread insert with locking shoulder and slotted keyway)
- Insert is compressed when tightened
Elastic Stop Nut
- Standard nut with a fiber locking collar
- Collar prevents loosening under vibration
- Increased height to accommodate the collar
- Resistant to hot or cold water, solvents (like ether and gasoline) and will not damage bolt threads or plating
Sheet Spring Nuts (e.g., speed nuts)
- Used with standard and sheet metal self-tapping screws in non-structural locations (e.g., supporting line clamps, conduit clamps, electrical equipment, doors)
- Made of spring steel
- Arched shape before tightening, preventing loosening
Identification and Coding
- Part numbers indicate nut type
- Letters and digits after the part number indicate material, size, thread type (right or left hand), and threads per inch
- Common types: plain, castle, plain check, light hex, castellated shear, wing nut
- Self-locking nuts have part numbers ranging from MS20363 through MS20367.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the world of aircraft nuts, including their classifications as non-self-locking and self-locking. Learn about the materials used, thread orientations, and the importance of safety in aircraft applications. This quiz covers essential knowledge for understanding how these components are vital in aviation.
