2530-12-179-8165

1560-99-730-2143 1560997302143 997302143 is a secondary structure whose function is to reduce drag by providing a streamlined surface or covering.

1560-99-477-3003 1560994773003 994773003 is a secondary structure whose function is to reduce drag by providing a streamlined surface or covering.

6680-14-355-5972 6680143555972 143555972 is an item so designed to have a portion or all of its body transparent to permit the visual examination of the amount of liquid in a pressure vessel, boiler, evaporator, still, processing tank, reservoir, pipe tubing line, and the like, and/or to determine the flow to a lubricated part. it may also be provided with an element that changes colors to indicate changes in moisture content. the item may have a means for refilling. excludes indicator, liquid quantity and indicator, rate of flow.

5330-00-788-5820 5330007885820 007885820 is a circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. it may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. excludes felt items but includes multimaterial items in which one of the materials is felt. for solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. for rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. for circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.

5315-19-004-2016 5315190042016 190042016 is a headless, generally cylindrically-shaped item having a straight, smooth, solid body, with or without a drilled hole(s). it has an outside diameter equal to or less than its length. its length must not exceed twelve inches (304 mm); for items whose length exceeds twelve inches (304 mm); see rod,straight,headless. it is used for aligning or transfer of torque and/or thrust, by fitting into corresponding holes of another item. see also pin,straight,threaded.