MS16995H
Screws nominal size #10 (.1900) and larger shall be permanently marked with the manufacturer's symbol. Marking size, type, and location of marks at manufacturer's option. Screws shall not be marked on bearing surfaces. Markings shall be raised or depressed on the screw head.
8. MATERIAL IDENTIFICATION MARKING:
Type 316 (UNS S31600) or 316L (UNS S31603) CRES screws nominal size #10 (.1900) and larger shall be permanently marked ‘‘316''. Markings shall be raised or depressed on the screw head at the manufacturer's option.
9. MATERIAL CODE:
For 300 Series CRES - No code after dash number indicates any 300 Series Austenitic Corrosion-Resistant
Steel listed in material requirement.
For Type 316 or 316L CRES - ‘‘S316'' after dash number indicates Austenitic Corrosion-Resistant
Steel
Type 316 or Type 316L.
10. FINISH CODE:
Passivate - No code letter after dash number, or after material code (if applicable), indicates passivate.
Black Oxide - ‘‘B'' after dash number indicates bl ack oxide coating (except for Type 316 or 316L CRES).
11. PART NUMBER:
The part number shall consist of the basic MS number, followed by a dash number from Table I, a material code (if applicable), and a finish code (if applicable).
EXAMPLES: MS16995-1 indicates Screw, Cap, Socket Head, Hexagon, 300 Series Corrosion-Resistant Steel; .0860-56 UNC-3A Nominal Thread Size, .188 Length, Passivated
MS16995-1S316 indicates Screw, Cap, Socket Head, Hexagon, Corrosion- Resistant Steel Type 316 or Type 316L; .0860-56 UNC-3A Nominal Thread Size, .188 Length, Passivated
MS16995-1B indicates Screw, Cap, Socket Head, Hexagon, 300 Series Corrosion-Resistant Steel; .0860-56 UNC-3A Nominal Thread Size, .188 Length, Black Oxide Coating
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