AMS 261 FINAL EXAM QUESTIONS WITH
ACCURATE ANSWERS
What does MS204704-3 mean? - ANSWER 470 - Universal style rivet
4 - 4/32nds diameter
3 - 3/16ths length
Breakdown NAS1097AD4-4? - ANSWER 2117 Alloy
Dimpled head style
4/32nd diameter
4/16ths length
What are the different major alloy elements? (Ex: 2024.) - ANSWER 1XXX - Aluminum
2XXX - Copper
3XXX - Manganese
4XXX - Silicon
5XXX - Magnesium
6XXX - Magnesium and Silicon
7XXX - Zinc
8XXX - Other Elements
,What type of rivets can not be used in their received condition? - ANSWER Icebox rivets
2017 and 2024
What are the most common rivet head styles used in aviation? - ANSWER 426 - 100
degree countersunk head or flush head rivet
470 -Universal head protruding head rivet
What is Edge Distance and what is the rule associated with it? - ANSWER Edge distance
is the distance from the edge of a piece of metal to a rivet.
The general rule is 2D minimum and 4D maximum edge distance.
What is the rule for rivet diameter? - ANSWER 3 * the thickest sheet
What formula do we use for rivet length? - ANSWER Total material thickness + 1D or
1.5D
You need to find a range of a minimum length and maximum length.
For min you use 1D
For max you use 1.5D
D is Diameter of your rivet
What is the rule for rivet pitch? - ANSWER The distance between adjacent rivets in the
, same row
3D minimum
10D to 12D maximum
What is transverse pitch? - ANSWER Distance between adjacent rivet rows with 75% of
pitch for staggered rivets.
What increment is a Silver Cleco in? - ANSWER 3/32nds
What increment is a Copper Cleco in? - ANSWER 1/8ths
What increment is a Black Cleco in? - ANSWER 5/32nds
What increment is Brass Cleco in? - ANSWER 3/16ths
What color is a 3/16ths Cleco? - ANSWER Brass colored
What color is a 5/32nd Cleco? - ANSWER Black
What color is a 1/8th Cleco? - ANSWER Copper
What color is a 3/32nd Cleco? - ANSWER Silver
ACCURATE ANSWERS
What does MS204704-3 mean? - ANSWER 470 - Universal style rivet
4 - 4/32nds diameter
3 - 3/16ths length
Breakdown NAS1097AD4-4? - ANSWER 2117 Alloy
Dimpled head style
4/32nd diameter
4/16ths length
What are the different major alloy elements? (Ex: 2024.) - ANSWER 1XXX - Aluminum
2XXX - Copper
3XXX - Manganese
4XXX - Silicon
5XXX - Magnesium
6XXX - Magnesium and Silicon
7XXX - Zinc
8XXX - Other Elements
,What type of rivets can not be used in their received condition? - ANSWER Icebox rivets
2017 and 2024
What are the most common rivet head styles used in aviation? - ANSWER 426 - 100
degree countersunk head or flush head rivet
470 -Universal head protruding head rivet
What is Edge Distance and what is the rule associated with it? - ANSWER Edge distance
is the distance from the edge of a piece of metal to a rivet.
The general rule is 2D minimum and 4D maximum edge distance.
What is the rule for rivet diameter? - ANSWER 3 * the thickest sheet
What formula do we use for rivet length? - ANSWER Total material thickness + 1D or
1.5D
You need to find a range of a minimum length and maximum length.
For min you use 1D
For max you use 1.5D
D is Diameter of your rivet
What is the rule for rivet pitch? - ANSWER The distance between adjacent rivets in the
, same row
3D minimum
10D to 12D maximum
What is transverse pitch? - ANSWER Distance between adjacent rivet rows with 75% of
pitch for staggered rivets.
What increment is a Silver Cleco in? - ANSWER 3/32nds
What increment is a Copper Cleco in? - ANSWER 1/8ths
What increment is a Black Cleco in? - ANSWER 5/32nds
What increment is Brass Cleco in? - ANSWER 3/16ths
What color is a 3/16ths Cleco? - ANSWER Brass colored
What color is a 5/32nd Cleco? - ANSWER Black
What color is a 1/8th Cleco? - ANSWER Copper
What color is a 3/32nd Cleco? - ANSWER Silver
