Stainless Steel Hex Nut
Product Details
Zhejiang Leadtek Fluid Technology Co., Ltd. is one of the most experienced manufacturers and suppliers of stainless steel hex nut in China. Please feel free to buy customized stainless steel hex nut at competitive price from our factory. Also, free sample is available.
Product Introduction
Leadtek's stainless steel hex nut is a precision-machined locking and sealing component manufactured to ISO 4144, the international standard for stainless steel threaded pipe fittings. It is produced from SS304 (CF8) bar stock and machined to BSPP (BSP parallel thread, ISO 228) geometry, this hex machine nut is engineered to mate directly with ISO 4144 union bodies, nipples, and end connections across the full 1/8"–4" size range (DN6–DN100).
Applications span food and beverage processing lines, chemical dosing systems, water treatment infrastructure, general HVAC pipework, and industrial process skids where corrosion resistance, dimensional repeatability, and compliance with recognized standards are procurement requirements.
Dimension
| Size | DN | m | SW |
| 1/8" | 6 | 6 | 19 |
| 1/4" | 8 | 6.5 | 21 |
| 3/8" | 10 | 7 | 25 |
| 1/2" | 15 | 8 | 30 |
| 3/4" | 20 | 9 | 37 |
| 1" | 25 | 10 | 45 |
| 1 1/4" | 32 | 11 | 53 |
| 1 1/2" | 40 | 12 | 60 |
| 2" | 50 | 13 | 72 |
| 2 1/2" | 65 | 15 | 89 |
| 3" | 80 | 17 | 105 |
| 4" | 100 | 19 | 132 |
Tolerance: 1/8"~2" L±0.3mm,2 1/2"~4" L±0.6mm
Key Features
Purpose-engineered for ISO 4144 union assemblies
The nut's face-perpendicularity and thread-pitch tolerances are held to pipe fitting standards, not general fastener standards, ensuring consistent seal compression across repeated assembly and disassembly cycles.
7-stage in-process inspection
Each production batch passes dimensional check, thread gauge verification, and surface passivation confirmation before release - reducing incoming inspection burden for distributors and project contractors.
Bonded seal and PTFE tape compatible
The BSPP parallel thread retains full bore geometry without deformation on tightening, allowing both seal methods without rework or re-tapping.
SS316/SS316L upgrade path
Standard SS304 covers the majority of applications; where chloride concentration, acid cleaning cycles, or pharmaceutical purity requirements apply, SS316L substitution is available within the same dimensional envelope and catalogue code structure.
OEM flexibility without minimum complexity
Custom thread forms (including NPT), private-label packaging, and logo engraving are handled in-house, with sample evaluation available before committing to volume.
Warehouse stock across the full size range
5,000 m² finished goods inventory covers DN6–DN100 in standard grade, supporting short call-off lead times for MRO and project top-up orders without requiring a full production run.
Application Scenarios
Food & Beverage Processing
In CIP sanitary pipelines, ISO 4144 union hex nuts ensure repeatable seal compression. SS304 meets FDA and EC 1935/2004 requirements, while SS316L is used for acidic or brine environments.
Chemical & Petrochemical Skids
Used as locking elements in ISO 4144 union assemblies for dosing, transfer, and sampling lines. Class 150 rating suits low-to-medium pressure service; SS316L supports chloride exposure.
Water Treatment & HVAC
Applied in potable water, chilled water, and cooling systems where corrosion resistance and easy maintenance are required. BSPP threads align with widely used European and Asian pipe standards.
Industrial Process & OEM Equipment
Used in stainless piping for compressed air, test rigs, and fluid skids. Suitable for instrument lines, drains, and gauge connections across DN6–DN100, supporting standard P&ID integration.
Selecting the right fitting involves more than matching a thread size. Leadtek's technical guideHow To Select The Right Stainless Steel Fittings: A Professional Engineer's Selection Guide covers material grade selection, pressure-temperature rating, and thread standard compatibility - useful background for specifying stainless steel hex nuts alongside other ISO 4144 components in the same assembly.
Why Source From Leadtek
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30+ years of stainless steel casting and CNC machining experience, with ISO 9001 and ISO 14001 certification.
400,000 sq.ft (37,000 m²) production facility in Quzhou, Zhejiang, with over 400 CNC machines and a dedicated quality control laboratory.
In-house 7-stage quality inspection covering dimensional check, thread gauge verification, surface passivation confirmation, and hydrostatic test on request.
5,000 m² finished goods warehouse enabling short lead times: domestic orders dispatched within 1 day; export orders within 7–15 business days.
Products exported to 80+ countries across Europe, North America, Asia-Pacific, and the Middle East.
Free sample available; competitive pricing with volume discount tiers for distributor and OEM contract accounts.
Frequently Asked Questions
Q: Can you produce fittings and valves according to our requirements?
Q: Can you do OEM and ODM?
Q: What packaging options do you offer?
Q: Are you a manufacturer or a trading company?
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