This is a recess developed by France for their Bureau de Normalisation de l’Aeronautique et de l’Espace, a French Standards Organization.
This cruciform recess is commonly known in the industry as BNAE. The French specification or “NORME FRANCAISE ENREGISTREE” is NF L 22-070.
Used for demanding aerospace applications, punches are available in 90/100 Deg. Flat Ctsk Head, 120 Deg. Flat Ctsk Head and in Pan head types. Custom head markings can be ordered and can include your company logo. The recess sizes are: 3,4,5, (6 and 7), and (8,10, and 12).
Please contact us if you would like more information on this recess.