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Self-locking fastener with captive washer
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Patent number 5,688,091
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Issue date Nov 18, 1997
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Hong-Kong Disc Lock Company, Ltd.
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Alistair N. McKinlay
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Self-centering, self-tightening fastener
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Patent number 5,203,656
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Issue date Apr 20, 1993
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Hong Kong Disc Lock Company, Limited
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Alistair N. McKinlay
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Lock washer assembly having wedge lock action
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Patent number 5,080,545
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Issue date Jan 14, 1992
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Hong Kong Disc Lock Company Limited
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Alistair N. McKinlay
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...