M00020642
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ISO FDIS 4759-3 2016 Edition, February 18, 2016 TOLERANCES FOR FASTENERS - PART 3: WASHERS FOR BOLTS, SCREWS AND NUTS - PRODUCT GRADES A, C AND F
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Availability date: 07/14/2021
Description / Abstract:
This part of ISO 4759 specifies tolerances for flat washers of product grades A, C and F with nominal diameters of 1 mm to 150 mm inclusive, designed to be used in bolted joints in combination with bolts, screws, studs and nuts.
This part of ISO 4759 may be applied to non-flat washers however it does not include all the tolerances related to these washers.
It applies to non-captive and captive washers, and to standard and non-standard washers. It does not apply to dynamic disc springs.
Washers of product grades F and A are intended to be used with bolts, screws, studs and nuts of product grades A and B; washers of product grade C are intended to be used with bolts, screws, studs and nuts of product grade C.
NOTE The product grade refers to a specific tolerance range related to dimensional and geometrical characteristics (product grade F for fine tolerances, product grade A for precise tolerances, product grade C for large tolerances).
Annex A (informative) presents tolerances taken from ISO 286‑1 and ISO 286‑2.