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1、International Standard $ 8738 0 Q 4 44 INTERNATIONAL ORGANIZATION FOR STANDARDIATION*MEKAYHAPOAHAA OPrAHMBAuR no CTAHAPTIAUWIORGANISATION NTEFINATONALE DE NFIMALISATIN Plain washers for clevis pins - Product grade A Rondelles plates pour axes d articulation - Grade A First edition - 1986-11-01 UDC 6
2、21.662.4 Ref. No. IS0 8738-1966 (E) Descriptors : fasteners, hinge pins, washers, plain washers, specifications, dimensions, designation. Price based on 3 pages Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies
3、). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and
4、non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 proced
5、ures requiring at least 75 % approval by the member bodies voting. International Standard IS0 8733 was prepared by Technical Committee ISO/TC 2, Fasteners. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other Internatio
6、nal Standard implies its latest edition, unless otherwise stated. 0 International Organization for Standardization, 1986 0 Printed in Switzerland -,-,- INTERNATIONAL STANDARD IS0 8738-1986 (E) Plain washers for clevis pins - Product grade A 1 Scope and field of application This International Standar
7、d specifies the characteristics of plain washers for clevis pins according to IS0 2340 and IS0 2341, Plain washers in accordance with this International Standard shall be used on the cotter pin end only. 2 References IS0 2081, Metallic coatings - Electroplated coatings of zinc on iron or steel. IS0
8、2340, Clevis pins without head. IS0 2341, Clevis pins with head. IS0 3269, Fasteners - Acceptance inspection. IS0 4520, Chromate conversion coatings on electroplated zinc and cadmium coatings. IS0 475913, Tolerances for fasteners - Part 3 : Washers for metric bolts, screws and nuts with thread diame
9、ters from 1 up to and including 150 mm - Product grades A and C. 1 -,-,- IS0 8738-1986 (El 3 Dimensions Surface roughness values in micrometres Dimensions in millimetres Nominal size d Hole diameter Outside diameter 4 d2 nom. (min.) I max. nom. (max.) I min. Thickness h nom. I max. I min. 12 : 16 20
10、 22 12 12,27 14 14,27 16 16.27 :i 22 6.18 8.2 10.22 18,27 20,33 22.33 12 I 11,57 I 13 1; 14,57 2 :i I 1: 3 I 17,57 1 I 23 1 Z7 1 23 28 27,4% 4 4,3 3,7 30 29,48 t 4,3 34 33.38 4.3 24 24 24,33 37 36,38 4 4,3 27 :; 27.52 39 38 56 t; 30 30,52 44 43 i 56 414 ii 33 36 33.62 36.62 47 50 46 49 : 2: 484 5,4
11、40 40 40.62 56 543 6 6:6 5,4 45 45 45.62 60 66 5,4 50 50 50,62 66 288 55 55 55.74 72 70:8 i 8 : 7 7 60 60 60.74 78 76,8 10 11 9 70 ii 70.74 Ei 903 :; 11 60 80.74 96,6 13.2 I:,8 1: 90 90.87 110 108,6 12 13,2 10.8 100 100.87 120 118,6 12 13,2 10,8 -,-,- IS0 8738-1986 (El 4 Specifications and reference
12、 International Standards Material St = Steel, hardness 160 to 250 HV (class 160 HV). Other materials as agreed between customer and supplier. I Tolerances I Product grade A to IS0 475913. All tolerances shall apply prior to the application of a platinn or coating. 1 - Plain, i.e. washers to be suppl
13、ied in natural finish, treated with a rust-preventative lubricant, unless otherwise soecified bv aareement between customer and suoolier. I I - . . Surface finish Preferred coatinas are black oxide, phosphate coating or zinc plating with chromate conversion coatina (see IS0 2081 and IS0 4520). - Oth
14、er coatings as agreed between customer and supplier. Workmanship Parts shall be uniform in quality and free of irregularities or detrimental defects. No burrs shall appear on any part of the washer. Acceptability The acceptance procedure is covered in IS0 3269. 5 Designation Example for the designation of a plain washer with nominal size 8, property class 16OHV : Washer IS0 8738 - 8 - IWHV 3 -,-,-