M28 x 0.5 Fine Pitch Lock Nut in 7075-T6 with Ø5 h7 Center
7075-T6 lock nut M28 x 0.5 6H, 7 mm effective thread depth: Ø39 +/-0.05 OD, Ø5 h7 center bore, multi groove weight relief, 10.3 +/-0.05 long, black anodized. Quote in 24 hours.
Robotics & Humanoid Robots
A larger fine pitch lock nut with an h7 center bore and multi groove inner profile, turned complete from 7075-T6 for encoder and rotating assembly locking.
Or email drawings to kgl@kglmfc.com
Key Specifications
| Parameter | KGL Capability |
|---|---|
| Material | Aluminum 7075-T6, 0.05 kg |
| Process | CNC turning of OD and faces, M28 x 0.5-6H threading 7 mm deep, multi groove internal boring, Ø5 center drilling, deburring, black anodize |
| Thread | M28 x 0.5-6H, 7 mm effective |
| Diameters | Ø39 +/-0.05, Ø29 +/-0.1, Ø33 +/-0.3; inner grooves Ø33.7 / Ø31 / Ø25.5 / Ø23.5 / Ø20 |
| Center bore | Ø5 h7 (-0.01) |
| Length | 10.3 +/-0.05 |
| Inspection | M28 x 0.5-6H plug gauge, micrometer and CMM on h7 bore and faces, appearance |
| Tolerance | ±0.005 mm standard on metals, engineering plastics, and carbon fiber composite |
| Certifications | ISO 9001:2015, ISO 13485:2016, AS9100D |
| Capacity | 100+ CNC machines including 11 five-axis centers |
| MOQ | No MOQ; 1-piece prototypes supported |
| Quote | Within 24 hours for complete 2D/3D files |
About This Part
This M28 x 0.5 6H lock nut carries 7 mm of effective thread depth for clamping force, an outer diameter at Ø39 plus or minus 0.05, and a Ø5 h7 center bore at minus 0.01 for a pilot or setting pin. The inner profile steps through Ø33.7, Ø31, Ø25.5, Ø23.5, and Ø20 grooves, cutting weight while keeping the thread ring rigid.
Overall length is 10.3 plus or minus 0.05 with controlled steps at 7, 2.75 plus or minus 0.02, and 34 plus or minus 0.05. 7075-T6 at 0.05 kg and black anodize finish the part.
Inspection is the M28 x 0.5 6H plug gauge, micrometer and CMM on the h7 bore and faces, and appearance.
This part family supports the Robotics Parts industry. Read how KGL machines parts for that sector, then send your drawing for a quote.
Why Machine It at KGL
Five-Axis Fleet
100+ CNC machines including 11 five-axis centers run complex geometry in single setups, so tolerances do not stack up across refixturing.
Verified Accuracy
±0.005 mm standard on metals, plastics, and carbon fiber composite, verified on Hexagon and Zeiss CMMs (0.0015 mm accuracy).
Fast Prototypes
Engineering feedback with every quotation; prototype parts typically machined in 15 to 25 days.
One Supplier, End to End
Material sourcing, machining, heat treatment coordination, finishing, CMM inspection and export packaging under one roof.
Part-Specific Advantages
- M28 x 0.5 6H thread with 7 mm effective depth
- Ø5 h7 (-0.01) center bore for pilot location
- Multi groove inner profile for weight relief
- Ø39 +/-0.05 OD, 10.3 +/-0.05 long
- 7075-T6 at 0.05 kg, black anodized
Typical Applications
- Encoder and motor shaft lock nuts
- Rotating assembly lock nuts with pilot bores
- Precision round nuts in automation drives
Commercial Terms
| Commercial | Detail |
|---|---|
| MOQ | No MOQ; 1-piece prototype supported |
| Quote | Within 24 hours for complete 2D/3D files |
| Terms | EXW / FOB Shenzhen |
| Certifications | ISO 9001:2015 |
| Packaging | Individual bubble wrap, export carton or wooden case |
| Lead Time | Prototypes 7 to 15 days; production scheduled by volume |
Common Questions
Why the multi groove inner profile?
It removes mass from a rotating nut without thinning the thread ring, which keeps the clamping section stiff where it counts.
What is the h7 center bore for?
A pilot or setting pin locates the nut angularly on assembly. h7 class means the pin fits without slop and without press.
More Robotics & Humanoid Robots Parts
Other parts KGL machines in this industry. Every card links to its own detail page.
Ready to Machine This Part?
Send your 2D/3D drawings and get a quote within 24 hours. No MOQ for prototypes and small lots.
Request a Quote