BS EN ISO 8676:2011 pdf download – Hexagon head screws with metric fine pitch thread — Product grades A and B
This International Standard specifies the characteristics of hexagon head screws with metric fine pitch threadwith nominal thread diameters, d, from 8 mm to 64 mm, of product grade A for nominal thread diameters, d,from 8 mm to 24 mm and nominal lengths, l, up to and including 10d or 150 mm, whichever is the shorter, andof product grade B for nominal thread diameters, d, over 24 mm or nominal lengths, l, over 10d or 150 mm,whichever is the shorter.
lf, in special cases, specifications other than those listed in this International Standard are required, they canbe selected from existing International Standards, for example lSO 724,ISO 888,ISo 898-1, IS0 965-1,ISO 3506-1,ISO 4753 and lSO 4759-1.
lt is intended that coarse thread screws according to ISO 4017 be the first choice.
2Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences,only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.
ISO 225, Fasteners —Bolts, screws, st uds and nuts —Symbols and descriptions of dimensionsISO 724,
ISo general-purpose metric screw threads —Basic dimensions
ISO 898-1,Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1:Bolts,screwsand studs with specified property classes —Coarse thread and fine pitch thread
ISO 965-1, ISO general-purpose metric screw threads —Tolerances — Part 1: Principles and basic dataISO 3269,Fasteners —Acceptance inspection
ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners —Part 1:Bolts, screws andstuds
ISO 4042,Fasteners —Electroplated coatings
ISO 4753, Fasteners —Ends of parts with external lso metric thread
ISO4759-1,Tolerances for fasteners —Part 1:Bolts, screws, studs and nuts —Product grades A, B and CISO6157-1,Fasteners —Surface discontinuities —Part 1: Bolts, screws and studs for general requirementsISo 8839, Mechanical properties of fasteners —Bolts,screws, studs and nuts made of non-ferrous metalsIso 8992, Fasteners —General requirements fo r bolts, screws,studs and nuts
ISO 10683, Fasteners —Non-electrolytically applied zinc flake coatings
3 Dimensions
See Figure 1 and Tables 1 and 2.
Symbols and descriptions of dimensions are specified in ISO 225.