1、A-A-2473 51 m 7777774 0042853 4 m COMMERCIAL ITEM DESCRIPTION WRENCH, OPEN END (NONSPARKING AND NONMAGNETIC) The General Services Administration has authorized the use of this commercial item description. This commercial item description covers open end wrenches made of a nonferrous alloy having a l
2、ow sparking hazard and a low magnetic permeability. Salient characteristics: Design. The open end wrenches shall have fixed wrench openings with 15 degree (plus or minus 5 degrees) offset wrench heads on each end as illustrated below, and shall be capable of withstanding a torsion load as shown in t
3、he table below without formation of a permanent set exceeding 5 degrees, formation of cracks, or fracture of heads or handles, and without perceptible indentation or gouging of the bearing surface of the serrations. Dimensions shall be as follows: Nat ional Stock Number Wrench Opening Sizes (Inches)
4、 Small head Large head Nom. Min. Max. Nom. Min. 7/16 0.440 0.446 1/2 0.503 9/16 0.566 0.573 5/8 fl.629 7 /a 0.880 0.888 15/16 0.943 1 1.006 1.015 i-i/a 1.132 1-1/16 1.068 1.077 1- 1/4 1.257 3/4 0.155 0.763 13/16 0.817 Minimum torsions loads shall be as follows: National Stock Minimum Torsion Load (I
5、n.-Lb.) Number (NSN) Small Head Large Head 5i20-00-ia4-a545 300 400 5120-00-ia4-a547 1200 1600 5120-00-184-a54a ia00 2200 5120-00-ia4-a549 2600 3200 5120-00-ia4-a550 2600 4200 5120-00-555-0476 560 a00 Minimum Overall Max. Length 0.509 5 inches 0.636 6 inches 0.825 9 inches 9 inches 0.952 10 inches 1
6、.142 1.267 12 inches fl 7 FSC 5120 THIS DOCUMENT CONTAINS 2 PAGES. _ - DISTRIBUTION STATEMENT A. Approved for public release; disstribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-249 3 Matsrial. The wrenches shall be forged
7、 or cast of beryllium copper or aluminum bronze alloy having an iron content not over five percent, and when present, it shall be well diffused throughout the alloy. When tested with a magnetic permeability indicator conforming to Military Specification MIL-1-17214, the magnetic permeability shall n
8、ot be above 1.2 on the indicator scale. Workmanship. Wrenches shall be smoothly finished and free from burrs and rough edges. Wrench openings shall be smooth and well defined. Marking. Each wrench shall be marked in a plain and permanent manner with the wrench opening sizes, name, abbreviation, or c
9、hemical symbol of the alloy, the manufacturers name or trademark of such known character that the source of manufacture may be readily determined, and the country of origin. Quality assurance provisions, Sampling for inspection shall be in accordance with MIL-STD-105, Sampling Procedures and Tables
10、for Inspection by Attributes, except where otherwise indicated herein. The lot size shall consist of all wrenches offered for acceptance at one time. A sample unit shall be one wrench. A. Examination for design, dimensions and workmanship. The inspection level shall be S-2 with an acceptable quality
11、 level (AQL) of 4.0 percent defective. B. Material. Material shall be ascertained by manufacturers certification. C. Torsion moment test. Torsion moment testing shall be in conformance with commercially accepted procedures. The inspection level shall be S-2 with an AQL of 4.a percent defective. Regu
12、latory reques. The offerer/contractor is encouraged to use recovered materials in accordance with Public Law 94-580, as amended, to the maximum extent practicable. Preservcon, packaging, packinq, labeling, and marking. The preservation, packag- ing, packing, labeling, and marking shall be as specifi
13、ed in the contract or order. Notes.; The issue of referenced documents in effect on the date of invitation for bid or request for proposals shall be used to determine compliance with the stated requirements. Sources for obtaining referenced documents may be determined by contacting the Contracting OfEicer. MILITARY INTERESTS: PREPARING ACTIVITY; NONE: DoD has determined that no military activity has an official interest in this commercial item description. GSA-FSS 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
