1、 A-A-2538 51 W 7777974 CIOLI2704 b p.0 A-A-2 53 8 October 14, 1987 COMMERCIAL ITEM DESCRIPTION ADJUSTING TOOL, VALVE TAPPET The General Services Adminstration has authorized the use of this commercial item description in preference to GGG-A-00147. This description establishes requirements for a l/l
2、inch male drive, screwdriver blade and driving knob hand tool used for adjusting overhead valve tappets of internal combustion engines while the engine is running at idle speed. p! L J Salient characteristics, Material. The material shall be as specified herein. Design. The adjusting tool shall be
3、similar to Figure 1 and shall consist of a handle, 1/2-inch square male drive, screwdriver blade and driving knob. FIGURE 1. Valve Tappet Adjusting Tool -c Handle. The handle shall be either offset or straight with strength and durability capable of withstanding a 300 inch-pound torque load. Y FSC 5
4、120 .K THIS DOCUMENT CONTAINS the reading to be taken as near the tip as practicable. Means shall be provided for retaining the screwdriver within the square drive without impairing its use. Accessories. Socket wrenches shall be furnished with 1/2 inch square drive in the following socket sizes: 1/2
5、 inch, 9/16 inch and 5/8 inch. Socket, socket wrenches. type II, Class 2, Style A. Identification marking. Each adjusting tool shall be etched or stamped in a permanent and legible manner with the manufacturers name or identifying symbol of such known character that the source may be readily identif
6、iable, part number and country of origin. Finish. All surfaces shall be clean and fzee of pits, nodules, burrs and cracks or other detrimental defects. Coating. The tools shall be coated to prevent rusting in accordance with accepted industry practice, Workmanship. The adjusting tools shall be free
7、from any defects that would affect appearance, serviceability or durability. QUALITY ASSURANCE PROVISIONS Sampling for inspection and testing. Sampling shall be in accordance with MIL-STD- 105, Sampling Procedures and Tables for Inspection by Attributes. The lot size shall consist of all adjusting t
8、ools offered or acceptance at one time. The sample unit is one adjusting tool. Socket wrenches shall be in accordance with GGG-W-641, Examination of end item for visual aiid dimensional requirements. Each adjusting tool shall be examined for workmanship, marking, and dimensional requirements. The in
9、spection level shall be Level I with an acceptable quality level (AQCS) of 4.0 defects per hundred units. Testing for hardness. The inspection level shall be S-2 with an AQL of 2.5 defects per hundred units. Testing shall be performed in accordance with ASTM E-18. Torsion test. A torsion test shall
10、be conducted on samples selected randomly in accordance with MIL-STD-105. Each adjusting tool shall be tested by inserting the male drive into a fixed female socket and applying a 300 inch-pound test Load to the handle in accordance with Figure 2. If the tool breaks, cracks or becomes deformed, it s
11、hall be considered defective. Regulatory requirements, In accordance with section 23,403 of the Federal Acquisition Regulations, the Governments policy is to acquire items composed of the highest percentage of recovered materials practicable, consistent with maintaining a satisfactory level of compe
12、tition without adversely affecting performance requirements or exposing suppliers employees to undue hazards from the recovered materials. 2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-2538 51 7779974 004270b T ?eode A-A-2 5 3 8 Sockof I -.
13、 1 d t li !l - -1 I Tappet 4fuiting To01 II. II , Preservation, packaging, packing, labeling and marking. Preservation, packaging, packing, labeling, and marking shall be as specified in the contract or order. - Notes. Purchasers should specify if socket wrenches are required. The issue of reference
14、d 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 Officer. ASTM test method is available from the American Soc
15、iety for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103. PREPARING ACTIVITY GSA-FSS NSNS 5120-00-293-0595 - with accessories Socket, socket wrench: NSNs 5120-00-237-0984 - 1/2 inch 5120-00-189-7932 - 9/16 inch 5120-00-189-7946 - 5/8 inch NSN 5120-00-293-0662 - without accessories 3. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
