DIN/ISO Standards & Charts
Citation-ready guides for metric 304 / A2-70 stainless fasteners. Start with the definition lines below, then open the chart or standard that matches your drawing.
Quote-ready definitions
- ISO 4014 = partial-thread hex bolt (shank); ISO 4017 = fully threaded hex head (DIN 933 family).
- DIN 912 and ISO 4762 describe the same metric socket head cap screw (SHCS) product family for most commercial buys.
- Coarse pitch is the default metric thread when a drawing lists only “M8” or “M10” with no pitch number.
- A2-70 is an ISO 3506-1 property class (~700 MPa min tensile) typically mapped to 304 stainless fasteners; 18-8 is US chemistry slang, not a strength class.
- Metric and imperial (UNC/UNF) threads are not interchangeable—even when outside diameters look similar (e.g. M6 vs 1/4-20).
Hex head — full vs partial thread
US RFQs often say “hex bolt.” Metric catalogs split full-thread (DIN 933 / ISO 4017) from partial-thread shank bolts (DIN 931 / ISO 4014).
- ISO 4014 vs 4017 (partial vs full thread)
One-line difference + RFQ checklist. Top GSC landing page.
- DIN 933 vs ISO 4017 difference
Full-thread family, WAF gotchas on M10–M14/M22.
- Hex bolt vs hex head screw (metric)
US wording mapped to DIN/ISO catalog names.
- Shop hex head screws
Metric 304 / A2-70 stock, filter by thread × length.
Socket head cap screws (SHCS)
Cylindrical head + hex socket. Common callouts: DIN 912 and ISO 4762. Primary category for precision assemblies.
Pitch, size charts & conversions
Wrong pitch is the #1 silent RFQ failure. Use these charts before you buy.
Stainless grades & property class
18-8, 304, A2-70, A4-80 name different layers—chemistry vs ISO 3506 class.
Machine screws, washers & self-tappers
Head-style and washer stack guides for panels and sheet metal.
Need a factory-direct quote? Contact sales or browse the SHCS catalog.