ASTM F837M-20,Standard Specification for Stainless Steel Socket Head Cap Screws [Metric].ASTM F837M-20 pdf free download here.
ASTM F837M-20 covers the chemical and mechanical requirements for stainless steel metric socket head cap screws (SHCS) with nominal thread M1.6 through M36 and intended for use in applications requiring general corrosion resistance.
Referenced Documents
ASTM A380/A380M Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems;
ASTM A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products;
ASTM A967/A967M Specification for Chemical Passivation Treatments for Stainless Steel Parts;
ASTM D3951 Practice for Commercial Packaging;
ASTM E18 Test Methods for Rockwell Hardness of Metallic Materials;
3. Classification
3.1 The designation of the property class for the two materials and conditions of this specification shall be consistent with the stainless steel designations in Specification F738M.
3.2 The austenitic stainless steel socket head cap screw shall be designated F837M Al-50. F837M AI-55, or F837M A1-70.
3.3 The martensitic stainless steel socket head cap screw shall be designated F837M C1-110.
5. Material and Manufacture
5.1 Forging – Unless otherwise specified, screws in sizes M3 through M20 with lengths up to 10 times the nominal product diameter or 150 mm, whichever is shorter, shall be cold headed except that they may be hot headed or machined by agreement with the purchaser. Larger sizes and lengths may be cold or hot headed. Screws smaller and larger than the M3 through M36 range may be machined Sockets may be forged or machined at the option of the manufacturer.
5.2 Thareads – Unless otherwise specified, screws in sizes up to M24 inclusive and product lengths up to 150 mm inclusive shall have threads formed by rolling, except by special agree- ment with the purchaser. Larger products may be rolled, cut, or ground at the option of the manufacturer.