S WE DI S H STA NDA R D S
IN S TI T U T E
Fastställd/Approved: 1998-05-29 Publicerad/Published: 2009-06-15 Utgåva/Edition: 1
Språk/Language: engelska/English ICS: 21.060.20
Fästelement – Sexkantslåsmuttrar (helmetalliska), utförande 1 – Hållfasthetsklass 5, 8 och 10 (ISO 7719:1997)
Prevailing torque type all-metal hexagon nuts, style 1 – Property classes 5, 8 and 10 (ISO 7719:1997)
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Europastandarden EN ISO 7719:1997 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO 7719:1997.
The European Standard EN ISO 7719:1997 has the status of a Swedish Standard. This document contains the official English version of EN ISO 7719:1997.
1
Prevailing torque type all-metal hexagon nuts, style 1 — Property classes 5, 8 and 10
1 Scope
This International Standard specifies the characteristics of prevailing torque type all-metal hexagon nuts, of style 1, with threads from M5 up to and including M36, in product grade A for threads up to and including M16 and product grade B for threads above M16, and with property classes 5, 8 and 10.
NOTE — The dimensions of the nuts with the exception of hmax correspond to those given in ISO 4032.
If other specifications are required, they should be selected from existing International Standards, for example ISO 261, ISO 965-2, ISO 2320 and ISO 4759-1.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 225:1983, Fasteners – Bolts, screws, studs and nuts – Symbols and designations of dimensions.
ISO 261:–1), ISO general purpose metric screw threads – General plan.
ISO 965-2:–2), ISO general purpose metric screw threads – Tolerances – Part 2: Limits of sizes for general purpose bolt and nut threads – Medium quality.
ISO 2320:1997, Prevailing torque type steel hexagon nuts – Mechanical and performance properties.
ISO 3269:1988, Fasteners – Acceptance inspection.
ISO 4042:–3), Fasteners – Electroplated coatings.
ISO 4759-1:–4), Tolerances for fasteners – Part 1: Bolts, screws, studs and nuts – Product grades A, B and C.
ISO 6157-2:1995, Fasteners – Surface discontinuities – Part 2: Nuts.
ISO 8992:1986, Fasteners – General requirements for bolts, screws, studs and nuts.
1) To be published. (Revision of ISO 261:1973) 2) To be published. (Revision of ISO 965-2:1980) 3) To be published. (Revision of ISO 4042:1989) 4) To be published. (Revision of ISO 4759-1:1978)
2
Symbols and designations of dimensions are specified in ISO 225.
1) Prevailing torque element, shape optional.
2) b = 15 to 30
3) Q = 90 to 120
Fig ure 1
Ta b le 1 — Dim ensions
Dimensions in millimetres
Thread (d) M5 M6 M8 M10 M12 (M14)1) M16 (M18)1) M201) (M22)1) M24 M30 M36
P2) 0,8 1 1,25 1,5 1,75 2 2 2,5 2,5 2,5 3 3,5 4
da max. 5,75 6,75 8,75 10,8 13 15,1 17,3 19,5 21,6 23,7 25,9 32,4 38,9
min. 5,00 6,00 8,00 10,0 12 14,0 16,0 18,0 20,0 22,0 24,0 30,0 36,0
dw min. 6,88 8,88 11,63 14,63 16,63 19,64 22,49 24,9 27,7 31,4 33,25 42,75 51,11 e min. 8,79 11,05 14,38 17,77 20,03 23,36 26,75 29,56 32,95 37,29 39,55 50,85 60,79
h max. 5,3 5,9 7,10 9,00 11,60 13,2 15,2 17,00 19,0 21,0 23,0 26,9 32,5
min. 4,8 5,4 6,44 8,04 10,37 12,1 14,1 15,01 16,9 18,1 20,2 24,3 29,4
mw3) min. 3,52 3,92 5,15 6,43 8,3 9,68 11,28 12,08 13,52 14,5 16,16 19,44 23,52 s max. 8,00 10,00 13,00 16,00 18,00 21,00 24,00 27,00 30,00 34 36 46 55,0 min. 7,78 9,78 12,73 15,73 17,73 20,67 23,67 26,16 29,16 33 35 45 53,8 1) The sizes in brackets should be avoided if possible.
2) P is the pitch of the thread.
3) Minimum wrenching height.
