ISO INTERNATIONAL STANDARD 8751 Third edition 2007-04-15 Spring-type straight pins Coiled, light duty Goupilles élastiques spiralées - Série mince Reference number ISO 8751:2007(E) @ ISO 2007 ISO 8751:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO non-governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 8751 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 10, Product standards for fasteners. This third edition cancels and replaces the second edition (sO 8751:1997), which has been technically revised. ISO 2007-All rights reserved ili INTERNATIONALSTANDARD ISO 8751:2007(E) Spring-type straight pins Coiled, light duty 1 Scope This International Standard specifies the characteristics of coiled light duty spring-type straight pins made of steel or of austenitic or martensitic stainless steel, with a nominal diameter, dg, from 1,5 mm to 8 mm inclusive. NOTE Spring-type straight pins, coiled, heavy duty, and spring type straight pins, coiled, standard duty, are the subjects of IsO 8748 and ISO 8750, respectively. 2 Normative references references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IsO 286-2, /sO system of limits and fits - Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts IsO 3269, Fasteners—Acceptance inspection Iso 4042, FastenersElectroplated coatings IsO 8749, Pins and grooved pins - Shear test 3 Dimensions See Figure 1 and Table 1. Swaged chamfer at both ends. Figure 1 @Is02007-All rights reserved ISO 8751:2007(E) Table 1 Dimensions Dimensions in millimetres nom. 1,5 2 2,5 3,5 4 5 6 8 max. 1,75 2,28 2,82 3,35 3,87 4,45 5,5 6,55 8,65 d1 before mounting min. 1,62 2,13 2,65 3,15 3,67 4,20 5,2 6,25 8,30 d2 before mounting max. 1,4 1,9 2,4 2,9 3,4 3,9 4,85 5,85 7,8 0,5 0,7 0,7 0,9 1 1,1 1,3 1,5 2 0,08 0,11 0,14 0,17 0,19 0,22 0,28 0,33 0,45 Minimum shear a 0,8 1,5 2,3 3,3 4,5 5,7 9 13 23 strength, double, kN b 0,65 1,1 1,8 2,5 3,4 4,4 7 10 18 1 c nom. min. max. 4 3,75 4,25 5 4,75 5,25 6 5,75 6,25 8 7,75 8,25 10 9,75 10,25 12 11,5 12,5 14 13,5 14,5 16 15,5 16,5 Range 18 17,5 18,5 20 19,5 20,5 22 21,5 22,5 Jo 24 23,5 24,5 26 25,5 26,5 28 27,5 28,5 commercial 30 29,5 30,5 32 31,5 32,5 35 34,5 35,5 lengths 40 39,5 40,5 45 44,5 45,5 50 49,5 50,5 55 54,25 55,75 60 59,25 60,75 65 64,25 65,75 70 69,25 70,75 75 74,25 75,75 80 79,25 80,75 85 84,25 85,75 90 89,25 90,75 95 94,25 95,75 100 99,25 100,75 120 119,25 120,75 Appliesto steeland martensitic corrosion resistantsteelproducts Applies to austenitic stainless steel products. For nominal lengths above 120 mm, steps of 20 mm. 2 @ISO2007-All rights reserved ISO 8751:2007(E) 4 Application The diameter of the hole into which the spring pin is to be inserted shall be equal to the nominal diameter, d1 of the mating pin and to tolerance class H12 in accordance with IsO 286-2. 5 Requirements and reference International Standards See Table 2 Table 2 Requirements and reference International Standards Austenitic Steel Martensitic stainless steel stainless steel St A c All pin diameters Alternative for pin Chemical compo