Hex Bolt, Full Thread (DIN 933 / ISO 4017)
A fully threaded hex bolt has threads running the entire length of the shank from head to tip. DIN 933 (with metric coarse thread) and ISO 4017 are the two most widely produced specifications in the Yongnian cluster. They are used in through-hole applications, tapped holes, and assemblies where the full bolt length must engage threads.
Specifications
| Standards | DIN 933, ISO 4017, ANSI/ASME B18.2.1, JIS B 1180 |
|---|---|
| Property Class | 4.8, 5.8, 8.8, 10.9, 12.9 |
| Diameter Range | M6 – M48 (1/4" – 2") |
| Length Range | 10 mm – 200 mm (longer on request) |
| Material | Carbon steel (Q235, 35#, 45#), Alloy steel (40Cr, 35CrMo) |
| Surface Finish | Plain, Zinc plated (white/blue/yellow), HDG, Black oxide, Dacromet, Geomet |
| Typical Application | Through-hole bolting, tapped holes, structural sub-assemblies |
Frequently Asked Questions
When should I use a fully threaded hex bolt instead of a partially threaded one?
Choose a fully threaded bolt when the entire bolt length must engage threads — for example, in tapped blind holes, when adjustment is needed across the full length, or when clamping through thin sections where a partial-thread bolt's smooth shank would protrude beyond the nut. Fully threaded bolts have lower shear capacity along the threaded portion than the smooth shank of a partial-thread bolt.
What is the difference between DIN 933 and ISO 4017?
DIN 933 and ISO 4017 are very similar metric fully-threaded hex bolt standards. The main differences are in across-flats (head wrenching size) on certain sizes — for example, M10 is 17 mm in DIN 933 but 16 mm in ISO 4017. ISO 4017 has been gradually adopted as the international standard, while DIN 933 remains common in European markets and existing drawings.
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