Document ID: chunk:federal_register_of_legislation:F2017L00081:reg:25:p5
Version: federal_register_of_legislation:F2017L00081
Segment Type: reg
Provision Reference: reg 25 (pt 5/15)
Character Range: 169944–173006

enepentamine and acrylonitrile;
 (v) polyfunctional aziridene amides with isophthalic, trimesic, isocyanuric, or trimethyladipic backbone also having a 2methyl or 2ethyl aziridine group (HX752, HX872 and HX877);
 (2) curing agents and catalysts as follows:
 (i) triphenyl bismuth (TPB);
 (3) burning rate modifiers as follows:
 (i) catocene;
 (ii) N‑butylferrocene;
 (iii) other ferrocene derivatives;.
 (4) nitrate esters and nitrato plasticisers as follows:
 (i) 1,2,4butanetriol trinitrate (BTTN);
 (5) stabilisers as follows:
 (i) N‑methylpnitroaniline.

Item 8—Category II
  Structural materials usable in the systems in Item 1, as follows:
 (a) composite structures, laminates, and manufactures thereof, including resin impregnated fibre prepregs and metal coated fibre preforms therefor, specially designed for use in the systems in Item 1 and the subsystems in Item 2 made either with organix matrix or metal matrix utilizing fibrous or filamentary reinforcements having a specific tensile strength greater than 7.62×104 m (3×106 inches) and a specific modules greater than 3.18×106 m (1.25×108 inches), (see Category IV (f), and Category XIII (d));
 (b) resaturated pyrolized (that is, carbon‑carbon) materials designed for rocket systems, (see Category IV (f));
 (c) fine grain recrystallized bulk graphites (with a bulk density of at least 1.72 g/cc measured at 15 degrees C), pyrolytic, or fibrous reinforced graphites useable for rocket nozzles and reentry vehicle nose tips (see Category IV (f) and Category XIII;
 (d) ceramic composites materials (dielectric constant less than 6 at frequencies from 100 Hz to 10,000 MHz) for use in missile radomes, and bulk machinable silicon‑carbide reinforced unfired ceramic useable for nose tips (see Category IV (f)).

Item 9—Category II
  Instrumentation, navigation and direction finding equipment and systems, and associated production and test equipment as follows; and specially designed components and software therefor:
 (a) integrated flight instrument systems, which include gyrostabilizers or automatic pilots and integration software therefor; designed or modified for use in the systems in Item 1 (See Category XII(d));
 (b) gyro‑astro compasses and other devices which derive position or orientation by means of automatically tracking celestial bodies or satellites (see Category XV(d));
 (c) accelerometers with a threshold of 0.05 g or less, or a linearity error within 0.25 percent of full scale output, or both, which are designed for use in inertial navigation systems or in guidance systems of all types (see Category VIII(e) and Category XII (d));
 (d) all types of gyros usable in the systems in Item 1, with a rated drift rate stability of less than 0.5 degree (1 sigma or rms) per hour in a 1g environment (see Category VIII(e) and Category XII(d));
 (e) continuous output accelerometers or gyros of any type, specified to function at acceleration levels greater than 100 g (see Category XII(d));
 (f) inertial or other equipment using accelerometers described by subitems (c) and (e)