MIL-G-174B Optical Glass0 pages

MIL-S-174B 5 December 1986 SUPERSEDING MIL-G-174A 5 November 1963 MILITARY SPECIFICATION GLASS, OPTICAL This spcification is approved for use by ail Departments and Agencies of the Department of Dfense. 1. SCOPE 1.1 Scope. This sp驩cification establishes the requirements for optical glass to be used in the fabrication of optical lments. Requirements for sp驩cial, class 2 (nonstandard), glass will be in accordance with the contract or purchase order. 1.2 Classification. Optical glass shall be of the following classes, grades, and forms (see 6.2): Class 1 - Standard Class 2 - Spcial Grades - A, B, C, D (striae content) Forms - Plates, slabs, formed pressings. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Spcifications, standards and handbooks. Unless otherwise specified, the following sp驩cifications, standards, and handbooks of the issue listed in that issue of the Department of Dfense Index of Spcifications and Standards (DoDISS) specified in the solicitation form a part of this sp驩cification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-B-601 - Boxes, Wood, Cleated Plywood. PPP-B-621 - Box, Wood, Nailed and Lock-Corner. PPP-B-636 - Box, Shipping, Fiberboard. PPP-C-1752 - Cushioning Material, Packaging, Unicellular Polyethylene Foam, Flexible. PPP-C-1797 - Cushioning Material, Rsilient, Low Density, Unicellular, Polypropylene Foam. Bn驩ficiai commente (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document, should be addressed to: Commander, US Army Armament, Research and Development Center, ATTN: SMCAR-ESC-AS, Dover, New Jersey 07801-5001 by using the self-addressed Standardization Document Improvement Proposai (DD Form 1426) appearing at the end of this document or by letter.