This standard was last reviewed and confirmed in 2017. Therefore this version remains current.
Abstract Preview
Specifies the dimensions. The 19 mm hexagonal integral stems with forged collared shank shall comply with the dimensions shown in figure 1 and given in table 1. The 22 mm stems shall comply with the dimensions shown in figure 2 and given in table 2. The 25 mm stems shall comply with the dimensions shown in figure 3 and given in table 3.
General information
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Status : PublishedPublication date : 1991-01
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Edition : 2Number of pages : 4
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- ICS :
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Equipment for drilling and mine excavation
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Life cycle
A standard is reviewed every 5 years
Revisions / Corrigenda
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Previously
ISO 721:1974
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Now confirmed
ISO 721:1991
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