Resources
Citation-ready guides for metric 304 / A2-70 stainless fasteners across common DIN/ISO standards.
- Metric vs Imperial Bolt Size Chart (US Buyer Guide)
Convert 1/4-20, 5/16, and other inch callouts to nearest metric M sizes—and why threads still will not mate without redesign.
- 18-8 vs A2-70 vs 304 Stainless Screws
18-8 is US chemistry slang; 304 is the alloy; A2-70 is the ISO property class. How to RFQ metric stainless without mixing them up.
- What Is Coarse Pitch on Metric Fasteners?
Coarse pitch = the default metric thread for each diameter. Chart, vs fine, and where to buy 304 A2-70.
- ISO 4014 vs 4017 Difference: Partial vs Full Thread Hex Bolts
4014 vs 4017 in one table—partial vs full thread, DIN cousins, and how to RFQ or shop metric 304 hex heads.
- Metric Coarse vs Fine Thread Pitch (Buyer Chart)
Coarse vs fine metric pitch chart for US RFQs—plus direct links to SHCS, hex head, nuts, and a copy-paste quote recipe.
- DIN 933 vs ISO 4017 Difference (Hex Head Screws)
DIN 933 vs ISO 4017 difference explained for US RFQs—hex bolt wording, WAF gotchas, and order checklist.
- A2-70 vs A4-80: Which Stainless Fastener?
When to choose A2-70 (304) vs A4-80 (316) for metric screws—specs, corrosion use-cases, and RFQ checklist.
- Self-Tapping Screws for Sheet Metal & Light Wood
When to pick pan head vs countersunk self-tappers for sheet metal, enclosures, and outdoor panels.
- Metric Machine Screws: Pan Head vs Countersunk
Choose pan head or countersunk machine screws for panels, furniture, and instrument housings.
- Choosing Flat Washers vs Spring Lock Washers
When to use flat washers, spring lock washers, or both under metric stainless fasteners.
- Metric Hex Head Bolts vs Hex Head Screws
How US-style “hex bolt” language maps to metric hex head screws in DIN/ISO catalogs.
- How to Specify Metric SHCS (Thread × Length × Drive)
A short specification recipe so RFQs arrive complete the first time.
- A2-70 / 304 Stainless Fastener Specs for Buyers
A practical guide to A2-70 property class and 304 stainless socket head screws.
- DIN 912 vs ISO 4762 Socket Head Cap Screws
What buyers need to know when a drawing calls out DIN 912 or ISO 4762 for metric SHCS.