ISO TOLERANCES FOR METRIC FASTENERS - Hobson

1 48H7H8H9H11H13H14+ + + + + 000+ + + + + + 00+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + R 286 ISO 4759/IISO 4759/IIISO 4759/IIIN otesANSI standards allow slightly wider TOLERANCES forscrew lengths than ISO and table is intended to assist in the design with metricfasteners. For TOLERANCES not listed here refer to thecomplete TOLERANCES FOR METRIC FASTENERSISO TOLERANCES FOR SOCKET SCREWS nominaltolerance zone in mm (external measurements) tolerance zone in mmdimensionovertoh6h8h10h11h13h14h15h16j s14js15js16js17m6010000 0+ + 0 000000 + + 00 00 + + 00 00.

2 075 + + 00 00 + + 00 00 + + zone in mmdimensionoverto C13C14D9D10D11D12EF8E11E12 Js9K93+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + TOLERANCEST olerances for METRIC FastenersThe TOLERANCES in the tables below are derived from ISO standard: ISO 4759 The tables show TOLERANCES on the most common METRIC FASTENERS .

3 However, occasionally some slight modifications are made. NotesProduct grade A applies to sizes up to M24 and length not exceeding 10 x diameter or 150 mm, whatever is grade B applies to the sizes above M24 and all sizes with lengths,greater than 10 x diameter or 150 mm, whichever is * tolerance zones for socket setscrews** tolerance zones for socket headcap screwsNote: For S to the actualallowance in the product standardshas been slightly modified for tech-nical ** >14D12 FeatureHexagon Sockets