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International Standard Category: Bolts, screws, studs

GB/T 821-1988    Square set screws with chamfered end
方头倒角端紧定螺钉 ;
Category No.:21.060.10 Valid Status:superseded
Issued Organization:China Machinery Industry Federation Issued Date:1988-06-24
Implemented Date:1989-7-1 Abolished Date:
Superseded Standard.:GB/T 821-2018 Square set screws with chamfered end
Superseded Date:2019-4-1
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