Cross recessed raised countersunk head drilling screws with tapping screw thread
Edition 1999-08

Fasteners - Hexagon socket countersunk head screws with reduced loadability
Edition 2019-09

BS EN 4496. Aerospace series. Screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating. Classification 1100 MPa (at ambient temperature) / 315°C
Edition 2018-05-10

High-strength structural bolting assemblies for preloading. System HR. Countersunk head bolt and nut assemblies
Edition 2018-08-02

Hexalobular socket raised countersunk (oval) head tapping screws
Edition 2011-02-28

Countersunk flat head screws (common head style) with type H or type Z cross recess. Product grade A. Steel screws of property class 8.8, stainless steel screws and non-ferrous metal screws
Edition 2011-09-30

Aerospace series - Screws, 100 ° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating - Classification: 1100 MPa (at ambient temperature) / 315 °C
Edition 2006-01-31

Screws, 100° countersunk normal head, offset cruciform recess, threaded to head, in titanium alloy, anodized, MoS2 lubricated. Classification. 1100 MPa (at ambient temperature)/315°C
Edition 1996-12-15

Specification for British Association (B.A.) low tensile screws and nuts for aeronautical purposes
Edition 1951-03-30