M8 x 1.0 Metric Fine Hex Nut, 316 Stainless Steel - XNUA4FM8
Available
The Hex Nut Metric Fine A4 (316) is a six-sided nut that screws onto a bolt, stud or threaded rod and is tightened with a spanner or socket.
The A4 (316) grade is stainless steel with added molybdenum, which helps it hold up where salt, pool chemicals or washdown chemicals are present. It is the more corrosion-resistant of the two common stainless grades, at a higher cost than 304. Metric fine (fine pitch) thread has more threads per millimetre than standard metric coarse thread, so it does not mate with coarse-thread nuts or tapped holes.
You can choose from 5 variants, covering sizes M8 x 1.0 to M16 x 1.50. Variants are supplied in packs of 50 to 100, depending on size.
Austenitic stainless steel is generally non-magnetic, although cold-worked parts can show weak magnetism. In wet conditions, keep stainless steel apart from aluminium and galvanised steel with a washer or sleeve, to reduce the risk of galvanic corrosion.
Where this product is used
- Securing bolts, studs and threaded rod
- Fittings where a fine pitch is specified, for finer adjustment
- Larger sizes for frames, plant and structural fixings
- Marine, coastal and washdown assemblies
- General engineering and maintenance fastening
- Coastal and marine installations
Features
- A4 (316) stainless steel with molybdenum, for coastal and chloride-exposed settings
- Matches bolts and studs of the same thread
- Choice of 5 sizes, M8 x 1.0 to M16 x 1.50
- Hex form for spanner or socket tightening
- Supplied in packs of 50 to 100
- Fine pitch thread for fittings that call for it
Key specifications
| Specification | Detail |
|---|---|
| Product | Hex Nut Metric Fine |
| Type | Six-sided nut that screws onto a bolt, stud or threaded rod and is tightened with a spanner or socket |
| Material | A4 (316) stainless steel |
| Size range | M8 x 1.0 to M16 x 1.50 |
| Thread system | Metric fine pitch |
| Number of variants | 5 |
| Magnetic response | Generally non-magnetic (austenitic); cold-worked parts can show weak magnetism |
| Pack size | 50 to 100, by size |
| Key features | Hex form for spanner or socket tightening; Matches bolts and studs of the same thread |
| Typical environment | Coastal, marine, pool and food-processing use |
| Head type | Hex |
| Fitting tip | Use anti-seize on the thread to reduce galling |
Selecting the right option
Match the nut to the bolt: thread system, diameter and pitch must all agree, and metric, UNC and BSW nuts do not interchange. Where a nut is tightened repeatedly, use anti-seize, because stainless threads can gall.
Related products
Also available: BSW Standard Hex Nut - 304 Stainless Steel, Metric Standard Hex Nut - 304 Stainless Steel and UNC Standard Hex Nut - 304 Stainless Steel.
Resources
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M8 x 1.0
Model Number: XNUA4FM8
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M10 x 1.0
Model Number: XNUA4EFM10
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M10 x 1.25
Model Number: XNUA4FM10
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M12 x 1.50
Model Number: XNUA4FM12
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M16 x 1.50
Model Number: XNUA4FM16
