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DIN 1441 - Washers for clevis pins, product grade C
Washers for clevis pins, product grade C, coarse finish: the outside diameters and thicknesses of DIN 1440, but with a hole wider than the pin. The nominal size is the pin diameter, not a thread size. Covers sizes 5 to 100; sizes 3 and 4 exist only in DIN 1440.
DIN 34815 - Plastic plain washers, normal series
Plain washers of the normal series made of polyamide (PA 6.6) instead of metal, with the nominal dimensions of DIN 125 in nine sizes, M3 to M20.
DIN 6340 - Washers for clamping devices
Hardened and tempered washers for clamping devices, hardness (350 + 80) HV 30, thicker and wider than a DIN 125 washer of the same thread size. Used together with clamps to DIN 6314, DIN 6315 and DIN 6316. Covers M6 to M30.
DIN 7349 - Washers for bolts with heavy type spring pins
Thick washers, about two to three times as thick as a DIN 125 washer of the same thread size and wider, for bolts used with heavy type spring pins. Covers M3 to M30.
DIN 7989-1 - Washers for use in structural steelwork, product grade C
Washers for use in structural steelwork, product grade C, 8 mm thick at every size, with the hole and outside diameter of an ISO 7091 washer of the same size. The nominal dimensions are the same as DIN 7989-2; the two parts differ in tolerances and hardness, not in geometry. Together with DIN 7989-2 it replaced the 1974 edition of DIN 7989.
DIN 7989-2 - Washers for use in structural steelwork, product grade A
Washers for use in structural steelwork, product grade A, hardness class 100 HV, 8 mm thick at every size, with the hole and outside diameter of an ISO 7091 washer of the same size. The nominal dimensions are the same as DIN 7989-1; the two parts differ in tolerances and hardness, not in geometry. Together with DIN 7989-1 it replaced the 1974 edition of DIN 7989.
DIN 988 - Shim rings and supporting rings
Shim rings and supporting rings ordered by inner diameter, outside diameter and thickness, such as 10x16x1.2, rather than by a thread size like a plain washer. They serve for precise axial positioning of machine parts and for backing retaining rings or lock washers. The 2025 edition replaces DIN 988:1990-03 and specifies dimensions, technical delivery conditions and designations.
EN 14399-5 - High-strength structural bolting assemblies for preloading - Part 5: Plain washers
Unchamfered hardened and tempered washers for preloaded structural bolting, unlike the chamfered washers of EN 14399-6. Used under nuts only, with hardness 300–370 HV and product grade A. EN 14399-5:2015 specifies nominal sizes M12–M36, including non-preferred M14 and M18.
ISO 10669 L - Plain washers for tapping screw and washer assemblies, large series, product grade A
Plain washers for tapping screw and washer assemblies (SEMS units), large series (type L): the holes of type N with wider outside diameters and, from size 4.8, greater thicknesses. Product grade A, hardness class 180 HV. The nominal size is the tapping screw diameter, not a metric thread. Covers sizes 2.2 to 9.5.
ISO 10669 N - Plain washers for tapping screw and washer assemblies, normal series, product grade A
Plain washers for tapping screw and washer assemblies (SEMS units), normal series (type N), with a hole smaller than the tapping screw diameter. Product grade A, hardness class 180 HV. The nominal size is the tapping screw diameter, not a metric thread. Covers sizes 2.2 to 9.5. Type L of the same standard is the large series, with wider outer diameters.
