HSM Aero
Aerospace Logistics Centre Unit 2b, Dunhams Lane, Letchworth Garden City, SG6 1BE
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About
HSM Aero Limited, a UK-based contract manufacturer with 50 years of heritage, specialises in producing complex mechanical equipment for the aerospace and defence sectors from its Letchworth, Hertfordshire facility. Leveraging advanced machinery including 5-axis CNC mills and Star sliding-head lathes, the company offers comprehensive manufacturing processes such as precision CNC milling and turning, sheet metal fabrication, welding, assembly, and surface treatment, working with a wide range of ferrous and non-ferrous materials. Holding AS9100D, ISO9001:2015, and ISO14001 registrations, alongside JOSCAR and Cyber Essentials Plus certifications, HSM Aero supports prime, T1, and T2 supply chains. Their strongest differentiator lies in offering value engineering and a fully integrated ERP system for streamlined production and live monitoring.
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HSM Aero Limited is a UK-based contract manufacturer with 50 years of heritage, specialising in the production of complex mechanical equipment for the aerospace and defence sectors. Located in Letchworth, Hertfordshire, the company offers a comprehensive suite of manufacturing processes.
Their capabilities include precision CNC milling and turning, sheet metal fabrication, welding, assembly, and surface treatment. They work with a variety of ferrous and non-ferrous materials such as aluminium, steel, copper, titanium, and bronze, utilising advanced machinery like 5-axis CNC mills and Star sliding-head lathes.
HSM Aero is AS9100D, ISO9001:2015, and ISO14001 registered, holding JOSCAR registration and Cyber Essentials Plus certification. They support prime, T1, and T2 supply chains, offering value engineering and a fully integrated ERP system for streamlined production and live monitoring.
Verified facts— hover any value to see its source
CNC capability4
- Sub-process
- Milling, Turning
- Specialist categories
- Pallet 5-axis, Swiss-type
- Named machine brands
- Haas, Matsuura, Star
- Tier-one builder presence
- Yes
Materials & sectors2
- Materials
- Copper, Brass
- Industries served
- Aerospace, Defence
Certifications & approvals3
- ISO 9001
- Held
- ISO 14001
- Held
- AS9100
- Held
Quality & traceability2
- Part marking
- Yes
- CofC offered
- Yes
Welding & fabrication4
- Welding automation
- Manual
- Welding materials
- Aluminium
- Fabrication offered
- Yes
- Fabrication sub-categories
- Sheet metal
Services & production3
- DFM support
- Yes
- In-house finishing
- Anodising, Heat treatment, Powder coating
- Repeat orders (Kanban / VMI)
- Yes
23 of 41 facets not yet verified — show which
CNC capability: CAM software · Aerospace-grade CAM · CAD software · In-house design · Tolerance (typical) · Tolerance (tight) · Micro-machining · MOQ (minimum batch) · Lead time (weeks)
Certifications & approvals: ISO 13485 · IATF 16949 · NADCAP · Primes supplied · ITAR registered
Welding & fabrication: Coded welding (any) · EN 1090 EXC level
Quality & traceability: NDT methods · Process traceability · Cleanroom assembly · 3D scanning · Industrial CT · In-house toolroom · FAIR capability (AS9102)