90/81646 DC被替代
Aerospace Series. Bolts, Bihexagonal Normal Head, Close Tolerance Normal Shank, Short Thread, In Titanium Alloy, Anodized, Mos2 Lubricated. Classification: 1100 Mpa (at Ambient Temp) 315 Deg Centrigrade (pren 3768) 315 Degrees Centrigrade (pren 2870)
出版：British Standards Institution
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