1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationSpecification for ISO metric black cup and countersunk head bolts and screws with hexagon nutsBS 4933:2nullnullnullBS 4933:2010 BRITISH STANDARDnullublishing and copnullright inf
2、ormationThe BSI copyright notice displayed in this docnullnullent indicates nullhen the docnullnullent nullas last issnullednullnull BSI 2010ISBN 9nullnull 0 nullnull0 nullnull224 nullInullS 21null0null0null10null 21null0null0null20The nullollonulling BSI renullerences relate to the nullornull on th
3、is standard: nullonullnullittee renullerence nullnullnullnull9 Dranullt nullor conullnullent 10null3020null43null Dnullnullublication histornullnullirst pnullnulllished nullarch 19null3Second nullpresentnull editionnull Decenullnuller 2010nullmendments issued since publicationnullate nullext affecte
4、d null BSI 2010 null iBS 4933:2010BRITISH STANDARDSummarnull of pagesThis docnullnullent conullprises a nullront conullernull an inside nullront conullernull pages i to iinull pages 1 to 1nullnull an inside nullacnull conuller and a nullacnull conullernullnullontentsnullorenullord iinull Scope 12 No
5、rnullatinulle renullerences 13 nullannullnullactnullre and property classes onull steel nullolts and screnulls 24 nullechanical properties onull steel nullolts and screnulls 2null nulleneral dinullensions and tolerances 2null nullength onull nullolts and screnulls 3null nullnds onull nullolts and sc
6、renulls 3null Screnull threads 39 Nnullts 5nullnull nullinish 5nullnull nullarnulling and identinullcation onull nullolts and screnulls 6null2 Inspection and testing 6null3 nullonullplete designation nullor the pnullrpose onull an ennullnulliry or order 7nullnnexesAnnenull A nullinnullornullatinulle
7、null Snullnullnullary onull renullnullirenullents 15Annenull B nullinnullornullatinullenull nullornullnulllae nullor nullasic dinullensions onull prodnullcts greater than 24 nullnull dianulleter 16Binullliography 18nullist of figuresnullignullre 1 null nullnullanullple onull nullarnulling onull cnul
8、lp head nullolts and screnulls 6nullignullre 2 null nullnullanullple onull nullarnulling onull conullntersnullnnull head nullolts and screnulls 6nullist of tablesTanullle 1 null Tolerances on nonullinal lengths 3Tanullle 2A null Thread lengths nullor all nullolts enullcept cnullp head snullnullare n
9、ecnull nullolts 4Tanullle 2B null Thread lengths nullor cnullp head snullnullare necnull nullolts 4Tanullle 3 null Thread rnullnnullonullt nullnulloltsnull and nullnderhead distance nullscrenullsnull 5Tanullle 4 null Reconullnullended nullolt and nnullt conullnullinations 5Tanullle null null nullnul
10、lp head nullolts and screnulls 8Tanullle null null nullnullp head nullolts nullith ninulls 9Tanullle null null nullnullp head snullnullare necnull nullolts 10Tanullle null null 90null conullntersnullnnull head nullolts and screnulls 11Tanullle 9 null 90null conullntersnullnnull head nullolts nullith
11、 ninulls 12Tanullle 10 null 90null conullntersnullnnull head snullnullare necnull nullolts 13Tanullle 11 null 120null conullntersnullnnull head snullnullare necnull nullolts 14Tanullle Anull1 null Snullnullnullary onull renullnullirenullents nullor nulloltsnull screnulls and nnullts 15Tanullle Bnull
12、1 null nullornullnulllae nullor nullasic dinullensions onull prodnullcts greater than 24 nullnull dianulleter 16BS 4933:2010ii null null BSI 2010BRITISH STANDARDnullorewordnullublishing informationThis British Standard is pnullnulllished nully BSI and canulle into enullnullect on 31 Decenullnuller 2
13、010null It nullas prepared nully Technical nullonullnullittee nullnullnullnull9nullFastenersnull A list onull organinullations represented on this conullnullittee can nulle onulltained on renullnullest to its secretarynullSupersessionThis British Standard snullpersedes BS 4933:19null3null nullhich i
14、s nullithdranullnnullInformation about this documentThis is a nullnullll renullision onull the standard and introdnullces the nullollonulling principal changesnullThe range onull prodnullcts specinulled to this standard has nulleen enulltended since the nullrst edition nullas pnullnulllished in 19nu
15、ll3null in particnulllar the nullechanical property classes to BS nullN ISnull null9nullnull1 that nonull inclnullde nullnullnull and 10null9nullNo ISnull prodnullct standards hanulle nulleen prodnullced nullor nullasteners to this standardnullA nullanullor nullse onull sonulle types onull nullasten
16、ers in this standard is in the steel constrnullction indnullstrynull nullhere their nullse nullight nulle snullnullnullect to the renullnullirenullents onull the nullonstrnullction nullrodnullcts Directinulle null1nullnull BS nullN 1null04nullhas nulleen nullritten to pronullide the harnulloninullat
17、ion renullnullirenullents nullor non preloaded strnullctnullral nullasteners and nullnull nullarnullingnullTo nulleet the loadanullility renullnullirenullents onull BS nullN 1null04nullnull nnullts connullornulling to BS nullN ISnull 4032null BS nullN ISnull 4033 and BS nullN ISnull 4034 shonullld n
18、ulle nullsednull Renullnullirenullents are also inclnullded nullor nullaintaining the loadanullility renullnullirenullents nullhen thicnull protectinulle coatings are applied that need nullodinulled thread tolerances nullor assenullnullly onull the nullolt and nnullt conullnullinationnullThe additio
19、nal thread dianulleters null30 and null3nullnull nullhich are conullnullonly nullsed in the steel constrnullction indnullstrynull hanulle nulleen inclnullded nullor cnullp and conullntersnullnnull nullolts and screnulls in the nullain dinullensional tanulllesnullnullresentational connullentionsThe p
20、ronullisions onull this standard are presented in ronullan nullinullenull nullprightnulltypenull Its renullnullirenullents are enullpressed in sentences in nullhich the principal anullnulliliary nullernull is nullshallnullnullCommentary, explanation and general informative material is presented in s
21、maller italic type, and does not constitnullte a normative elementnullnullontractual and legal considerationsThis pnullnulllication does not pnullrport to inclnullde all the necessary pronullisions onull a contractnull nullsers are responsinullle nullor its correct applicationnullnullompliance with
22、a British Standard cannot confer immunitnull from legal obligationsnullnull BSI 2010 null 1BS 4933:2010BRITISH STANDARDnull ScopeThis British Standard specinulles renullnullirenullents and pronullides general dinullensions and tolerances nullor the nullollonulling types onull cnullp head and conulln
23、tersnullnnull head nullolts and screnulls:null cnullp head nullolts and screnullsnullnull cnullp head nullolts nullith ninullsnullnull cnullp head snullnullare necnull nulloltsnullnull 90null conullntersnullnnull head nullolts and screnullsnullnull 90null conullntersnullnnull head nullolts nullith n
24、inullsnullnull 90null conullntersnullnnull head snullnullare necnull nulloltsnullnull 120null conullntersnullnnull head snullnullare necnull nulloltsnullnullechanical properties nullor steel nullolts and screnulls are specinulled in BS nullN ISnull null9nullnull1nullThis British Standard also specin
25、ulles renullnullirenullents nullor the nnullts to nulle pronullided nullith nullolts and screnulls connullornulling to this standardnullnullnullnullnull 1 null tanullle snullmmarinulling tnulle nulley renullnullirements of nullnull 4933 is inclnullded in nullnnex nullnull nullnullis tanullle does no
26、t list every renullnullirement in nullnull 4933 nullnullt is nullnullst intended as a nullnullicnull reference for nullsersnullnullnullnullnull 2 nullt is considered tnullat tnulle range of nominal sinulles inclnullded in tnullis standard is adenullnullate for most of tnulle applications for nullnul
27、licnull tnullis series is linullely to nulle employed, nullnullt for tnulle convenience of nullsers renullnulliring larger sinulles, fnullrtnuller information is provided in nullnnex nullnull2 nullormatinulle referencesThe nullollonulling renullerenced docnullnullents are indispensanullle nullor the
28、 application onull this docnullnullentnull nullor dated renullerencesnull only the edition cited appliesnull nullor nullndated renullerencesnull the latest edition onull the renullerenced docnullnullent nullinclnullding any anullendnullentsnull appliesnullBS 3null43null1null nullnullnull metric scre
29、null tnullreads null nullart 1null nullrinciples and nullasic dataBS 3null43null2:200nullnull nullnullnull metric screnull tnullreads null nullart 2null nullpecinullcation for selected limits of sinulleBS null3null1 nullall partsnullnull Coatings on metal fastenersBS nullN 20null9nullnull2:1994null
30、ISnull null9nullnull2:1992null nullecnullanical properties of fasteners null nullart 2null nullnullts nullitnull specinulled proof load valnulles null Coarse tnullreadBS nullN 1null04nullnull1null nullonnullpreloaded strnullctnullral nullolting assemnulllies null nullart 1nullnulleneral renullnullir
31、ementsBS nullN 1null04nullnull2null nullonnullpreloaded strnullctnullral nullolting assemnulllies null nullart 2nullnullnullitanullility testBS nullN ISnull null9nullnull1:2009null nullecnullanical properties of fasteners made of carnullon steel and alloy steel null nullart 1null nullolts, screnulls
32、 and stnullds nullitnullspecinulled property classes null Coarse tnullread and nullne pitcnull tnullreadBS nullN ISnull 4032null nullexagon nnullts, style 1 null nullrodnullct grades null and nullBS nullN ISnull 4033null nullexagon nnullts, style 2 null nullrodnullct grades null and null BS nullN IS
33、null 4034null nullexagon nnullts null nullrodnullct grade CBS 4933:20102 null null BSI 2010BRITISH STANDARDBS nullN ISnull 4nullnull3null Fasteners null nullnds of parts nullitnull external nullnullnull metric screnull tnullreadBS nullN ISnull 4nullnull9null1:2001null nullolerances for fasteners nul
34、l nullart 1null nullolts, screnulls, stnullds and nnullts null nullrodnullct grades null, null and CBS nullN ISnull 10nullnull4null Fasteners null nullot dip galvaninulled coatingsBS ISnull 9nullnullnullnull:199nullnull nullnullnull general pnullrpose metric screnull tnullreads nullnullolerances nul
35、l nullart 5null nullimits of sinulles for internal screnull tnullreads to mate nullitnull nullotnulldip galvaninulled external screnull tnullreads nullitnull maximnullm sinulle of tolerance position null nullefore galvaninullingBS ISnull null992null Fasteners null nulleneral renullnullirements for n
36、ullolts, screnulls, stnullds and nnullts3 nullanufacture and propertnull classes of steel bolts and screws3nullnull nulleneral renulluirementsnullrodnullcts nullor nullse in strnullctnullres that are snullnullnullect to the nullonstrnullction nullrodnullcts Directinulle null1null shall connullornull
37、 to the harnulloninullation and nullnull nullarnulling renullnullirenullents onull BS nullN 1null04null nullnulloth partsnull and BS ISnull null992null3null2 nullethod of productionAt the discretion onull the nullannullnullactnullrernull nullolts and screnulls shall nulle prodnullced nully either ho
38、t or cold nullorgingnull3null3 nullropertnull classesAs specinulled nully the pnullrchasernull the property classes shall nulle 4nullnullnull 4nullnullnull nullnullnullor 10null9null connullornulling to BS nullN ISnull null9nullnull1:2009null4 nullechanical properties of steel bolts and screwsThe nu
39、llechanical properties onull steel nullolts and screnulls shall connullornull to BS nullN ISnull null9nullnull1nullnull nulleneral dimensions and tolerancesnullor general dinullensionsnull nullolts and screnulls shall connullornull to Tanullle 2 and Tanullle null to Tanullle 11null nulllanullse null
40、null nulllanullse nullnull and nulllanullse nullnullnullnullnullnull nullanullle 5 to nullanullle 11 are after Clanullse 13 in tnullis standardnullnullor tolerancesnull nulloltsnull screnulls and nnullts shall connullornull to BS nullN ISnull 4nullnull9null1:2001null prodnullct grade nullnull enullc
41、ept nullor nonullinal length nullnullnullnullnullhich shall connullornull to Tanullle 1null and thread tolerance class nullnullor nullhich see nullnull2nullnullnull BSI 2010 null 3BS 4933:2010BRITISH STANDARDTanullle 1 nullolerances on nominal lengths Dinullensions in nullillinulletresnullength null
42、Onuller nullp to and including nullolerances10 1null 0null901null 30 1null0null30 null0 1null2nullnull0 null0 1nullnull0null0 120 1nullnullnull120 1null0 2null001null0 2null0 2null302null0 31null 2nullnull031null 400 2nullnullnull400 null00 3null1nullnull nullength of bolts and screwsIn the case onu
43、ll cnullp head nullolts and screnullsnull the nonullinal length shall nulle the distance nullronull the nullnderside onull the head to the enulltrenulle end onullthe shannullnull inclnullding any chanullnuller or radinullsnullIn the case onull conullntersnullnnull head prodnullctsnull the nonullinal
44、 length shall nulle the distance nullronull the nullpper nullace onull the head to the enulltrenulle end onullthe shannullnull inclnullding any chanullnuller or radinullsnullnullnullnullnull nulltandard nominal lengtnulls are not specinulled in tnullis standardnullnull nullnds of bolts and screwsThe
45、 nullollonulling nullornulls onull ends onull nullolts and screnulls shall nulle pernullitted:null nullat point nullnullnullnullnullnull asnullrolled end nullRnullnullnullnull ronullnded end nullRNnullnullnull as specinulled in BS nullN ISnull 4nullnull3nullThe end shall nulle reasonanullly snullnul
46、lare nullith the centre line onull the shannullnullnull Screw threadsnullnullnull nulleneralThe nullornull onull threadnull dianulleters and associated pitches shall connullornull to BS 3null43null1 and BS 3null43null2null nulloarse pitch series threads only shall nulle nullsednullnullnull2 nulloler
47、ancesnullor thread tolerance classnull selnullnullcolonullr or nullncoated nullolts and screnulls shall connullornull to BS 3null43null2:200nullnull nullgnull and nnullts shall connullornull to BS 3null43null2:200nullnull nullHnull nullor nulloltsnull screnulls and nnullts nullhich are galnullaninul
48、led or BS 4933:20104 null null BSI 2010BRITISH STANDARDsherardinullednull the nnullt shall nulle tapped onullernullsinulle and it shall connullornull to BS ISnull 9nullnullnullnull:199nullnull class nullAnullnullnullor nulloltsnull screnulls and nnullts nullhich hanulle any other coating that renull
49、nullires nullodinullcation onull the thread tolerance nullor the nullolt and nnullt to assenullnullle nullhen coatednull the relenullant part onull BS null3null1 shall nulle consnulllted nullor details on tolerancesnullnullnull3 nullength of thread on boltsThe length onull thread on nullolts shall nulle the distance nullronull the end onullthe nullolt nullinclnullding any chanullnuller or radinullsnull to the leading nullace onull a screnull ring ganullge nullhich has nulleen screnulled as nullar as possinullle onto the nullolt nully handnullThe lengths onull thread shall nulle as n
