Safety relief valve brochure provides information on a complete line of valves for commercial and industrial applications; versatile 800 Safety Valve Series is highlighted; also features the new line of Figure 700 Series Safety Valves and Diverter Valves. Spence Engineering Co., Inc. Enter No. 216

1,240-page catalog entitled "Handbook of Metric Drive Components, Catalog 785" includes a 234-page technical reference section, which covers design theory, calculations and provides useful tables for designing spur, internal, helical, screw, bevel and worm gears. SDP/SI Enter No. 218

Catalog of milling and routing cutters features more than 500 cutters that are specially designed, manufactured and field-life tested for machining most aluminum, plastic and composite materials found in aircraft manufacturing plants and job shops around the world. Onsrud Cutter, Inc. Enter No. 217

12-page brochure is an informative guide to automated deburring with brushes; helps determine the best brush and system design for the specific application; includes a burr classification system for reference. Weiler Corp. Enter No. 219