1670,
34
(b) Tungsten wire and filament, coated or uncoaled, cut or
uncut.
Tantalum, as follows--
(4) Raw materials;
(6) Ferro-tantalum and ferro-tantalum-niobium;
(c) Metal and tantalum-based alloys containing 60% or more
tantalum niobium in combination;
(d) Scrap forms of the metal and alloys covered under sub-
item (c).
1671.
Titanium, as follows-
(a) Metal and titanium-based alloys containing 10% or more
titanium
(b) Serap forms of the metal and alloys covered under sub-
item (a).
1721.
1673.
Artificial graphite having an apparent relative density of 1.90 or greater.
4744.
1746.
1701.
GROUP I
CHEMICALS. METALLOIDS AND PETROLEUM PRODUCTS.
Primary explosives and priming compositions, as follows- (a) Mercury fulminate, lead azide. lead styphinate, lead thiocyanate botrazene and dlazodinitrophenol; primary explosives or priming compositions (mixtures) containing one or more of these chemicals.
(4) Sodium azide.
4701.
1702.
1715.
Lead dinitroresarcinate and barium styphinates; primary expla- sives or priming compositions (mixtures) containing one or more of these chemicals.
Hydraulic fluids, as follows-
(a) Synthetic, having a viscosity of not more than 4,000 centislokes at 65°F. (-54°C) and not less than 1.5 centistokes at +302 F. (+130°C); or
() Which are or which contain as the principal ingredients petroleum (mineral) oils and which have` all three of the following characteristics—
(i) a pour point of -30°F. (-34°C) or lower;
(i) a viscosity index of 75 or greater; and
(iii) are thermally stable at +700°F (+371°C).
Boron, as follows--
(a) Boron element, boron compounds and mixtures in which the boro-10 isotope comprises more than 20% of the total boron content;
(6) Boron element (metal) all forms;
1754.
35
(c) Boron compounds and mixtures, excluding pharmaceutical
specialities packaged for retail salo, the following-
(0) Boron trichloride and its complexes: boron trifluoride and its complexes:
(1) Fluoroboric acids; ammonium, potassium and sodium Buoroborates:
(iii) Boron carbides, hydrides and nitrides;
(iv) Alloys, compounds and mixtures containing 5% or more of boron, free or combined, including-
(1) Boron minerals, including but not limited to Colemanite, Rasorite and Ulexite, crude or refined;
(2) Boric acids; amummonium. calcium, magnesium, potassium and sodium berates; boric oxides;
(3) Enamel and glass-making compositions or mix- tures containing more than the equivalent of 30% BO,.
Diethylene triamins of a purity of 96% or higher.
Pentaerythritol tetranitrate.
Polymeric substances and manufactures thereof, not elsewhere specified, as follows-
(a) Polyimides;
(6) Polybenzimidazoles;
(<) Polyimidazopyrrolones;
(d) Aromatic polyamides;
(<) Polyparaxylylenes.
Fluore carbon compounds and manufactures, not elsewhere specified, as follows-
(a) Monomers, homopolymers and co-polymers, as follows-m
() Tetrafluoroethylene and polytetrafluoroethylene; (ii) Chlorotrifluoroethylene and polychlorotrifluoroethy- lense:
(l) Polyvinylidenefluoride;
(fv) Co-polymer of tetrafluoroethylene and hexafluoro- propylene;
(*) Co-polymer of tetrafluoroethylene and chlorotrifluo- coethylene;
(vi) Co-polymer of chlorotrifluoroethylene and vinylide- nefluoride;
(vi) Co-polymer of hexafluoropropylene and vinylides nefluoride;
(vii) Polybromotrifluoroethylene;
(x) Co-polymer of bramotrifluoroethylene and chlorotri- fluoroethylene:
[x] Dibromotetrafluoroethane;
(b) Manufactures made wholly of the materials in sub-item (a);
(e) Electric wire and cable coated with or insulated with any
of the materials in sub-item (a).