CapandNeckFinishes
Screwthreadcapsizesaregenerallyexpressedastwonumbers
Thefirstnumberreferstothecapdiameter(inmillimeters)andthecorrespondingGlassPackagingInstitute(GPI)/SocietyofthePlasticsIndustry(SPI)finishdiameter
Thesecondnumberreferstotheheightandthreadconfigurationoftheclosureorfinish
Belowisaselectionofcommonlyusedcapsandfinishes
S=ThreadStartH=FinishHeightT=MajorDiameterE=MinorDiameterI=HoleDiameterT-OutsidediameterofthecontinuousthreadE-Outsidediameterofthefinishshaftexcludingthread(1
5turnofthread)(圈螺牙)I-TheinsidediameterofthefinishatthesmallestpossiblepointS-ThedistancebetweenthetopofthefinishtothetopofthethreadL-Thedistancebetweenthetopofthefinishtothetopofthetransferbead
(optional)H-HeightfromthetopofthefinishtothebottomwhereitintersectswiththeshoulderW-Thethicknessofthetra