FF-L-2937
AMENDMENT 2
February 1,2007
SUPERSEDrNG
AMENDMENT-
1
May 22,2006
FEDERAL SPECIFICATION
COMBINATION LOCK, MECHANICAL
The General Services Administration has authorized the use of this
amendment, which forms a part of FF-L-2937, dated January 31, 2005, by
all federal agencies.
Page 4
Paragraph 3.5, delete first sentence and substitute the following:
"A three wheel lock shall not open when the dial is turned more than 1 graduation
on either side of the graduation set for each wheel."
Page
4
Paragraph 3.6, delete in its entirety and substitute the following:
"3.6 Thermal
o~eration. The lock shall operate properly up to a temperature of
155 degrees Fahrenheit. The lock is not required to operate at temperatures
exceeding 155 degrees Fahrenheit. The lock bolt shall not be able to be
retracted without the proper combination when exposed to extreme heat. The
lock shall be tested in accordance with paragraph 4.7.2."
Page 5
Add new paragraphs, as follows:
'Y
3.13.1 Bolt Material. The lock bolt shall be made of Type 304 stainless steel or equal
material that is corrosion resistant, has a minimum tensile strength of 85,000 psi,
and a hardness of
Rockwell B85.
13.2 Bolt Desian. The locking bolt shall have two threaded holes in the end of the
bolt. The holes shall be
#lo-32 UNF with a center to center distance of 0.563
2
0.005 inch. The holes shall be tapped to a minimum depth of 0.375 inch (see
figure 4).
Page
8
Paragraph 4.7.1, change all references to "112 graduation" to
"1
graduation".
.
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