1.1 JDM F25 specifies requirements for black color appearance, hexavalent chromium-free zinc flake coatings with a 0.09-0.16 coefficient of friction (CoF) requirement. Two levels of corrosion resistance are available, 240 hour and 960 hour. Note 1 JDM F25 uses black color appearance as a visual i...

This procedure is used to test and evaluate the resistance of fastener surface finishes to laboratory salt spray testing.

In June 1975, drafts of the planned new editions of DIN 315 (wing nuts) and of DIN 316 (wing screws) were published; they made a distinction between Part 1 "heavy duty type" and Part 2 "light duty type". This distinction did not however meet with general approval. because it did not reflect the r...

This Japanese Industrial Standard specifies the steel cross recessed head screws (hereafter, referred to as “steel screws” ), stainless steel cross recessed head screws (hereafter, referred to as “stainless steel screws") and nonferrous metal cross recessed head screws (hereafter, referred to as ...

This Japanese Industrial Standard specifies the basic profile, formulas and basic dimensions for unified fine screw threads used for aircrafts and other purposes of limited necessity.

This standard covers the complete general and dimensional data for metric flat countersunk, oval countersunk and pan slotted and recessed head machine screws and metric hex and hex flange head machine screws recognized as standard. Also included are Appendices which provide specifications and ins...