Application guide for Internally Threaded Dowel Pin to GB/T 120.1 / ISO 8735. The core duty of the type is precise location and light shear duty between two parts. The typical industries, the how-to-specify checklist, assembly practice and the exclusion cases are set out below. Stocked across roughly M4 to M20, they cover general to heavy-duty work.
Typical Applications for Internally Threaded Dowel Pin — GB/T 120.1 / ISO 8735 (Series 099)
The most common settings where these are specified:
- General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.
- Maintenance & repair (MRO): a stocked size for servicing existing plant where the original fastener spec must be matched.
- Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.
- Jigs & fixtures: precise location of tooling plates and locating features.
- Linkages & hinges: pivot points carrying light shear.
How to Specify Internally Threaded Dowel Pin — GB/T 120.1 / ISO 8735 (Series 099) for Your Application
- Size: Match the nominal size to the mating thread or hole. This product spans M4–M20; check the full table below for the exact dimensions of each size.
- Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
- Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- Standard: This product is supplied to GB/T 120.1 / ISO 8735. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.
Installation & Assembly Practice
- Ream the hole to the specified fit class; a dowel pressed into a drilled-only hole will not locate accurately.
- Press pins in with steady force rather than hammer blows where possible, and chamfer the hole entry.
Common Selection Mistakes with Internally Threaded Dowel Pin — GB/T 120.1 / ISO 8735 (Series 099)
- Using a dowel pin as a load-carrying shear bolt — dowels locate, they are not sized for sustained shear.
- Ignoring the fit class: a locational fit and an interference fit need different hole tolerances.
Where Internally Threaded Dowel Pin — GB/T 120.1 / ISO 8735 (Series 099) Are Not the Right Choice
Not for carrying significant tensile or repeated heavy shear loads — use a bolt or a keyed joint for that.