GSA GGG-M-350 B-1990 MIRROR INSPECTION《查验镜》.pdf
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1、 I NCH-POUND GGG-M- 35 OB July 16, 1990 SUPERSEDING GGG -M- 3 5 0A September 8, 1966 FEDERAL SPECIFICATION MIRROR, IKSPECTION This specification is approved by the Commissioner, Federal Supply Service, General Ser-vices Administration, for the use of all Federal agencies. 1. SCOPE AND CLASSIFICATION
2、 1.1 Scope. This specification covers inspection mirrors of the type generally used for visual examination in positions and places where it would otherwise be difficult or impossible to see. 1.2 Classification. The inspection mirrors shall be of the following types, classes, and styles, as specified
3、 (see 6.1). Type I - Ball joint (mirror adjustment) Class 1 - Circular mirror Style A - Fixed length handle Style B - Telescoping length handle Style A - Fixed length handle Class 2 - Oval mirror Type II - Plunger actuated (mirror adjustment Class 3 - Rectangular mirror 2. APPLICABLE DOCUMENTS 2*.1
4、Government publications. The isques of the following documents in effect on date of invitation for bids or solicitation for offerr, form a part sf this specification to the extent specified hereit. Federal Specifications: QQ-C-320 - Chromium Plating (Electrodeposited) QQ-N-294 - Nickel Plating (Elec
5、trodeposited) PPP-P-40 - Packaging and Packing of Hand Tools (Activities outside the Federal Government may obtain copies of Federal Specifications, Standards, and Commercial Item Descriptions, as outlined under General Information in the Index of Federal Specifications, Standards and Commercial Ite
6、m Descriptions. The index, which includes cumulative bimonthly supplements as issued, is for sale on a subscription basis by the Superintendent of Documents, U. S. Government Printing Office, Washington, DC 20402. (Single copies of this specification, .other Federal Specifications, Standards, and Co
7、mmercial Item Descriptions required by activities outside the Federal Government for bidding purposes are available without charge from General Services Administration Business Service Centers in Boston; New York; Philadelphia; Washington, DC; Atlanta; Chicago: Kansas City, MO; Fort Worth; Houston;
8、Denver; Los Angeles; San Francisco; and Seattle, WA. (Federal Government activities may obtain copies of Federal Specifications, Standards, Commercial Item Descriptions and the Index of Federal specifications, Standards, and Commerical Item Description from established distribution points in their A
9、gencies. 1 DISTRIBUTION STATEMENT A: Approved for public release, distribution is unlimited. FSC 5128 Licensed by Information Handling Services+- GGG-Pi-350B CL 7777774 0057707 T GGG-M-358B Military Standard: MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes (Copies of milita
10、ry specifications and standards required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) Other publications. The following form a part of this specification to the extent specified herein. Unl
11、ess otherwise, indicated, the issue in effect on date of invitation for bids shal.1 apply. American Society for Testing and Material (ASTM Standard: ASTM B 633 - Specification for Electrodeposited Coatings of Zinc on Iron and Steel (Application for copies should be addressed to the American Society
12、for Testing Materials, 1916 Race Street, Philadelphia, PA 19103.) 3. REQUIREMENTS 3.1 Materials. The material used in the manufacture of inspection mirrors shall be steel. 3.2 Components. The inspection mirrors shall consist of a mirror, handle, 3.3 Coating. Unless otherwise specified (see 6.11, all
13、 metal components, and applicable mirror angle adjustment mechanism. other than corrosion-resistant steel, shall be either chromium, nickel plated, or zinc plated. 3.3.1 Chromium plating. Chromium plating shall be as specified in QQ-C-320, class 1, type I. .? .,.3.2 Nickel platino. Nickel platin- sh
14、all be. as specified in QQ-N-ZYE:, class 1, grade G, as applicable. 3.3.3 Zinc plating. Zinc plating shall be as specified in ASTM B 633, Type II, Service Condition 2 (moderate). 3.4 Mirror reflecting surface. Unless otherwise specified (see 6.1), the reflecting surface of the mirror shall be glass.
15、 The mirror shall reflect an image that is free from distortion or blind spots. The glas shall be protected by a stainless steel back. When specified (see 6.11, the reflecting surface shall be one of the following, at the manufacturers option. (a) 304 or 430 corrosion resistant stainless steel, poli
16、shed on both sides (b) Brass, or cold rolled steel. These materials shall be chromium plated a minimum of 0.000045 .inch over a minimum of 0.0082 inch nickel on both sides. (c) Cold rolled steel, chromium plated a minimum of 8.000005 inch over a minimum of 0.0002 inch nickel one side, and nickel pla
17、ted a minimum of 0.0002 inch other side. The mirror reflecting surfaces must have a 7 micro-inch finish or better and polished. 3.4.1 For the type I, class 1 mirror, a chipboard or paperboard shim shall be placed between the back and the mirror. The metal edqes of the back shall be rolled or coined
18、to prevent the mirror from falling out or separatinq from backing. 3.4.1.1 For the type I, class 2 mirror, the metal back shall be punched out with one tab on each side of the mirror and two tabs on back. Paperboard or chipboard shim and mirror are placed in the metal frame back. The two tabs shall
19、be folded to hold mirror in place. Licensed by Information Handling Services- t 1/16 Overall length Size inch Minimum Max imum Inches Inches Inches GGG-M-350B 3.5.1.1 For the type I, class 2 mirror, the metal back shall be punched out with one tab on each side of the mirror and two tabs on back. Pap
20、erboard or chipboard shim and mirror are placed in the metal frame back. The two tabs shall be folded to hold mirror in place. The reflective coating of the glass mirrors shall be so deposited as to preclude any defects or blemishes in the reflecting surface such as, lifting or separation of the sil
21、ver from the glass. The reflecting surface shall be free from spots or haze resulting from incomplete removal of chemicals used in preparing the silvered surface of the glass, or any other visible defects in or on the silver. 3.5.2 Silvering. 3.5.3 Chromium plated mirrors. When a chromium plated bra
22、ss or steel mirror is furnished, it shall conform to the requirements of 3.3.1 and 3.4 on both sides. mirror is furnished, it shall be polished on both sides and conform to the requirements of 3.4. straight across the mirror surface and shall include the edges of the protective surface. Overall leng
23、th measurements shall be made with the mirror and handle in a straight line. 3.7 Identification marking, Each mirror shall be marked, on a surface other than the reflecting surface with the manufacturers name or identifying symbol and the state or country of manufacture. The marking shall be etched,
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- GSAGGGM350B1990MIRRORINSPECTION 查验 PDF
