WORLDWIDEFASTENERSTANDARD
WA900Date:2021-12-01
DIMENSIONALREQUIREMENTSOFBOLTSANDBOLTWASHERASSEMBLIESWITHHEXAGONOR
HEXAGONFLANGEDHEADS
1.SCOPE
Thisstandardgivesdimensionalrequirementsforhexagonbolts,hexagonflangedbolts,andboltwasher
assemblieswithISOmetricthreaddiametersM4toM24inclusiveforhexagonboltsandM5toM24inclusivefor
hexagonflangedbolts.
2.REFERENCES
ISO261Generalpurposemetricscrewthreads-Generalplan
ISO965Generalpurposemetricscrewthreads-Tolerances
ISO898-1Mechanicalpropertiesoffastenersmadeofcarbonsteelandalloysteel,Part1
ISO1502Generalpurposemetricscrewthreads–Gaugesandgauging
ISO3508Threadrun-outsforfastenerswiththreadinaccordancewithISO261andISO262
ISO4014Hexagonheadbolts-ProductgradeA
ISO4017Fasteners-Hexagonheadscrews-ProductgradeA
ISO4753Fasteners-EndsofpartswithexternalISOmetricthread
ISO6157-3Fasteners–Surfacediscontinuities-Part3
ISO15071Hexagonboltswithflange–Smallseries–ProductgradeA
WA950MaterialandMechanicalPropertiesofBolts,Studs,andBoltWasherAssemblies
WA990SurfaceDiscontinuitiesofBoltsandScrews
WF900DimensionalandMechanicalPropertiesofFlatandConicalWashers
3.GENERALREQUIREMENTS
3.1DIMENSIONSANDTOLERANCES(excludingthreads)
Thebasicdimensionsareshownintheindividualproductstandardsor‘UtilityPart’drawings.Unspecified
dimensionsandtolerancesshallbeinaccordancewith:
ISO15071forhexagonflangeheade