Driving components - Flange bearings - Fastened with four screws
Edition 2004-09

Driving components - Cap-bearings, half bearings - Fastening with four screws
Edition 2004-09

Rolling bearings - Angular contact radial ball bearings - Part 4: Single row, double-direction - not self-locking, with double-split inner ring (Four-point contact bearing)
Edition 2008-02

Four hole button
Edition 1994-05

Transportation chain - Pallets - Four way timber perimeter-base pallets; 1 000 mm × 1 200 mm brewery pallets
Edition 2019-06

Pallets - Timber four-way-flat pallets; 800 mm × 600 mm
Edition 2019-06

Aerospace - Shielded electrical cables, copper conductors, insulated shield, one to four conductors, 600 V, 150 and 260 °C - Technical specification; Inactive for new design
Edition 2014-12

Information technology - Office machines - Method of specifying colour reproduction with YES/NO criteria - Part 3: Test charts for output properties - Testing of equality for four equivalent grey definitions and discriminability of the 16 grey steps, only on CD-ROM
Edition 2010-12

Transmission systems and two-ports; measures for attenuation
Edition 1971-11

Testing of lubricants - Testing in the four-ball tester - Part 1: General working principles
Edition 2015-03