30 Questions
What is a rivet?
A type of fastener that obtains its clamping action through mechanical upset
Which organization originates the rivet specifications AN and NAS?
Air Force-Navy (AN)
What do rivet specifications stipulate?
The dimensions and material to be used
Why do aircraft manufacturers use standard hardware like rivets?
To build reproducible aircraft at an economical cost
What happens to a solid-shank rivet when it is driven into a hole?
Its cross-sectional area increases
Why are solid-shank rivets considered the most commonly used aircraft fastener?
Because they change in dimension to fit the size of a hole
How is the length of a universal head (AN470) rivet measured?
From the bottom of the manufactured head to the end of the shank
In rivet codes, what does the third part represent?
Alloy material
What does MS20470 indicate in terms of rivet codes?
Head style
Which system uses a one- or two-digit letter code for representing rivet alloy material?
Both AN and MS2O
What is the correct way to measure the length of a countersunk rivet (AN426)?
From the top of the manufactured head to the end of the shank
What unit is used to indicate shank diameter in rivet codes?
$32-in. increments
What is the term for allowing an alloy to cool at room temperature?
Natural ageing
How does precipitation heat-treatment differ from natural ageing?
It accelerates the ageing process
Why are blind rivets sometimes preferred over solid-shank rivets?
They require access to only one end
What is a characteristic of Cherry friction-lock rivets?
They can be hollow-shank pull-through or self-plugging types
What does natural ageing of an alloy involve?
Allowing the alloy to cool at room temperature
In aircraft construction, why were Cherry friction-lock rivets significant?
They were the first widely used blind rivets
What is the purpose of a mechanical-lock rivet?
To prevent the centre stem from falling out due to aircraft vibration
Which type of rivet has a stem that breaks off after assembly?
Friction-lock rivet
What head styles are available for Cherry friction-lock rivets?
Universal and countersunk
Which type of rivet is used as a structural replacement for solid-shank rivets?
Huck-Lok rivet
What weak point is built into the stem of a friction-lock rivet?
A point that shears after assembly
How many standard diameters are Cherry friction-lock rivets usually supplied in?
Three diameters
What is the main difference between a Hi-Shear rivet and a standard AN bolt?
A bolt is secured by a nut, while a Hi-Shear rivet is secured by a crushed collar.
What is the purpose of tapping a Hi-Shear rivet into its hole before swaging the locking collar?
To ensure the rivet is properly aligned with the hole.
What feature of the Hi-Shear rivet allows it to absorb high shear loads effectively?
Its specially milled groove at the lower portion of the shank.
How is a Hi-Shear rivet secured in place during installation?
By swaging on a locking collar.
What is the function of the two head styles available for Hi-Shear rivets?
To provide options for different aircraft builders' preferences.
Why is it important to ream the side wall clearance to a specific tolerance for installing a Hi-Shear rivet?
To ensure proper fit and alignment of the rivet during installation.
Learn about the specifications and standards for aircraft hardware rivets, including identifiers like AN, NAS, and MS. Understand the purpose of rivets and how they are used in aircraft construction.
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