Aluminum rivet is simpler to handle. It does not need aging and provides better high-temperature and shear properties than conventional rivets. Tests at upset height of up to 1.7 diameters have shown rivets to have exceptionally good crack resistance

Charles, J. F.

English

NASA Technical Reports Server

A1ftil 1975	 B75-10044 
NASA TECH BRIEF S Lyndon B. Johnson Space Center 
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	 - 
High-Strength Rivet Does Not Require Aging 
The problem: 
Conventional rivets used in the manufacture of 
aircraft require high-temperature and high-shear 
properties. They are kept in cold storage (aged) at 
approximately -18° C (0° F) temperature and must be 
installed within 2 hours after removal from the cold 
storage. This makes their handling inconvenient.
diameters and a minimum head height of 0.3 rivet 
diameters. _Tests at the upset height of up to 1.7 
diameters have shown the rivets to have exceptionally 
good crack resistance. 
Note: 
Requests for further information may be directed 
.
The solution:	 to: 
A new aluminum rivet is simpler to handle. It does
	 Technology Utilization Officer 
not need aging and provides better high-temperature
	 Johnson Space Center 
and shear properties than conventional rivets.
	 Code AT3 
How it's done: 
The new rivet can be used at temperatures up to 
180° C (350° F); conventional rivets are limited to 
temperatures below 120° C (250° F). The new rivet is 
constructed from 2219-aluminum alloy and is heat 
treated to condition T62. It has been designed with 
flush, flush shear, and universal heads. Double-shear 
tests show the rivet has a shear strength of 2.21x108 
N/rn 2 (32 ksi). The new rivets are capable of being 
driven with a minimum head diameter of 1.4 rivet
Houston, Texas 77058 
Reference: TSP7510044 
Patent status: 
NASA has decided not to apply for a patent. 
Source: J. F. Charles of
Rockwell International Corp.
under contract to

Johnson Space Center 
(MSC-19301) 
S Categories: 06 (Mechanics) 
07 (Machinery) 
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High-strength rivet does not require aging

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