| 摘要 |
A bolt head cover ( 10 ) comprises an outer heat resistant portion ( 12 ) and an inner gripping portion ( 14 ). The bolt head cover ( 10 ) is arranged to be placed over the bolt head ( 16 ). The bolt head cover ( 10 ) is retained in position by means of the inner gripping portion ( 14 ) which grips the bolt head, with the gripping portion ( 14 ) being retained in the heat resistant portion ( 12 ) by means of flanges ( 18 ).
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