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Keener Rubber Company
            Keener produces all our rubber bands from the highest grade of natural and synthetic rubber available

 

 

Excerpted from Part I - Section C - DESCRIPTION/SPEC.			Page 9 of 54
Commercial Item Description A-A-131
Rubber Bands
The General Services Administration has authorized the use of this commercial item description
in lieu of Federal Specification ZZ-R-1415.
Issued: October 22, 1979
Salient Characteristics:
	The rubber bands shall be compounded from natural rubber, synthetic rubber (SBR), or
synthetic natural rubber (Polyisoprene), or any mixture of the three.
	The unit weight shall be 1/4 pound or 1 pound, as specified in the solicitation for offer.
	The number of rubber bands per pound for each size band, shall be in accordance with
table I.
TABLE I.  Size designation, count, and inside length
-------------------------------------------------------------------------------------------------------------------------------
	size number		number of bands per		inside length
				pound, minimum			(inch) +/- 5%
		8			7,300				7/8
		10			5,200				1-1/4
		11			4,050				1-1/2
		16			2,500				2-1/2
		18			2,100				3
		19			1,750				3-1/2
		32			  950				3
		33			  850				3-1/2
		64			  425				3-1/2
		84			  210				3-1/2
-------------------------------------------------------------------------------------------------------------------------------
Tensile strength, breaking force, ultimate elongation, and tensile set requirements for rubber
bands shall be as specified in table II.
Table II.  Strength, elongation and set
-------------------------------------------------------------------------------------------------------------------------------
 		        STRENGTH			Ultimate			
	Tensile strength,	Breaking force,		elongation,	Tensile set,
Sizes	     minimum		    minimum		minimum	maximum
-------------------------------------------------------------------------------------------------------------------------------
		p.s.i.		pounds			percent		percent
8 thru 19	-----		   5			   700		    15
32 and 33	-----		   12			   700		    15
64 and 84	1,200		  -----			   700		    15
-------------------------------------------------------------------------------------------------------------------------------
Workmanship.  The bands shall be free from ragged and nicked edges
Recovered Materials.  The manufacturer shall utilize recovered materials to the maximum extent
possible.

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Last modified: January 31, 2000