Fasteners

Question 1

What type of non-threaded fastener is used for joining without access from one side?

Answer 1

A blind rivet

Question 2

A bolt requires to be tightened at 450 ft/lbs. Using a 1:5 torque ratio what is the setting on the wrench?

Answer 2

90 (450 ÷5)

Question 3

What is the purpose of a taper pin?

Answer 3

Precise location of mating parts

Question 4

What is the tap drill size for a 7/8” - 9 UNC screw?

Answer 4

49/64”

Question 5

What is the included angle on an acme thread?

Answer 5

29 degrees

Question 6

What is the pitch of a fastener referring to?

Answer 6

The amount of threads per inch

Question 7

What is pitch?

Answer 7

A measurement from one point of thread to the corresponding point on the next thread

Question 8

What is the thread angle of an Imperial thread?

Answer 8

60 degrees

Question 9

What type of fastener is used to secure a bearing hub to a shaft?

Answer 9

A set screw

Question 10

A screw that creates a mating helix when installed is called a?

Answer 10

Self tapping screw

Question 11

A bolt that is tightened by turning counter clockwise is said to have what?

Answer 11

A left hand thread

Question 12

The crest of a thread refers to what?

Answer 12

The top point of the thread

Question 13

In reference to fasteners TPI stands for what?

Answer 13

Threads per inch

Question 14

NTP threads are used for what?

Answer 14

For threading pipe fittings

Question 15

What medium is used to secure an anchor to concrete floor?

Answer 15

Epoxy

Question 16

A screw thread micrometer checks what?

Answer 16

Pitch diameter

Question 17

What is the length of an outside bend in an L shaped fastener in relation to its diameter?

Answer 17

4 X diameter

Question 18

What type of thread is on a lead screw for a lathe for thread cutting purposes?

Answer 18

Acme (29°)

Question 19

What type of thread is ideal for load support in one direction?

Answer 19

Buttress