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Dumbbell-shaped symmetric bidirectional tapered thread connection pair
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Connecting structure for bolts and nuts having "olive"-shaped left-right asymmetric thread flanks larger at left and smaller at right
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Connection structure of bolt and nut of thread outlining symmetrically and bidirectionally tapered olivary shape
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Connection structure of external thread and traditional thread with asymmetrical bidirectional conical thread having olive-like shape
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Connection structure of internal thread and traditional thread with symmetrical bidirectional conical thread having olive-like shape
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Unidirectional rotation structure used for looseness preventing mechanical fastening mechanism
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Self-fastening anti-loose mechanical fastening mechanism
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Multi-screw-pair loosenness-prevention mechanical fastening mechanism
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Looseness-proof machinery fastening mechanism
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Self-tightening multi-screw-pair anti-loose mechanical fastening mechanism
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Connecting structure of shaft base and integrated guide base of self-clinching drill chuck
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Double main supporting type self-fastening drill chunk
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Integrated guide assembly of self-clinching drill chuck
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Shaft base of self-clinching drill chuck
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Composite bearing for self-tightening drill chuck
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