Special Fasteners (Review)

Question 1

For Nominal Cherrymax rivets: What size rivet is used with a #30 drill bit?

Answer 1

4/32

Question 2

For Nominal Cherrymax rivets: What size rivet is used with a #20 drill bit?

Answer 2

5/32

Question 3

For Nominal Cherrymax rivets: What size rivet is used with a #10 drill bit?

Answer 3

6/32

Question 4

For Oversized Cherrymax rivets: What size rivet is used with a #27 drill bit?

Answer 4

4/32

Question 5

For Oversized Cherrymax rivets: What size rivet is used with a #16 drill bit?

Answer 5

5/32

Question 6

For Oversized Cherrymax rivets: What size rivet is used with a #5 drill bit?

Answer 6

6/32

Question 7

What are the 5 parts of a special fastener identification code?
Ex: CR3242-6-4

Answer 7

-Fastener type (CR - CherryMAX rivet)
-Rivet type material combination (324)
-Head style - Odd number = Protruding - Even number = Countersunk (2)
-Shank diameter in 32nds (6/32)
-Max grip length in 16ths (4/32)

Question 8

Use CR3213-6-4 to answer the following:
What is the grip range?

Answer 8

3/16 to 4/16

Question 9

Use CR3213-6-4 to answer the following:
What is the diameter measured in?

Answer 9

6/32nds

Question 10

Use CR3213-6-4 to answer the following:
What is the head style?

Answer 10

Protruding

Question 11

How is the stem of a cherry rivet held in place?

Answer 11

With a locking collar

Question 12

What are the 3 head styles of bulbed cherrylock rivets?

Answer 12

-Large
-Blind Head
-Countersunk

Question 13

What are the 2 styles of Rivnuts?

Answer 13

Open and Closed

Question 14

Where are Rivnuts used and how are they held in place?

Answer 14

Used in pressurized areas - Held in place by clamping force

Question 15

Identify what the different parts of the following Rivnut part number stands for:
10 K B 75

Answer 15

10 - Screw Size
K - Keyed
B - Closed End
75 - Max grip length in 1000th/in

Question 16

How many radial lines can Rivnuts have?

Answer 16

5

Question 17

How are Hi-shear rivets held in place and what material are they made from?

Answer 17

Held in place by a swaged collar - Made from Steel

Question 18

What are Hi-shear rivets designed for?

Answer 18

To absorb high shear loads

Question 19

What are the 2 styles of Lockbolts?

Answer 19

Pull-type & Stump-type

Question 20

What kind of loads are Lockbolts designed to take and the number of locking rings for each?

Answer 20

Shear (2 rings) & Tension (3+rings)

Question 21

How are Hi-loks installed?

Answer 21

Allen Wrench and Special tool

Question 22

How many parts are there to a Friction lock?

Answer 22

2 parts

Question 23

What is the degree of the Friction lock countersink head and where are they used?

Answer 23

100 Degrees - Only used in approved structures

Question 24

What are the 3 different types of Quarter turn fasteners (and their parts) and how are they measured?

Answer 24

*Dzus(Stud, Grommet, Spring)- Length measured in hundredths/in (1/100)
Airloc-(Stud, Cross Pin, Stud Receptacle) Length measured in thousandths/in (1/1000)
*Camloc(Stud, Grommet, Receptacle) - Female measured by Inner Diamter
Male measured by Outer Diameter

Question 25

What is the industry standard edge distance?

Answer 25

2D - 4D
(D=Diameter)