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The M12 × 50mm Hexagon Head Bolt A2 (304) Stainless Steel DIN 931 is designed for secure fastening in engineering, fabrication, maintenance and general assembly applications. Manufactured from A2 stainless steel, it offers good corrosion resistance for a wide range of indoor and suitable outdoor environments.
Manufactured to DIN 931, this hexagon head bolt features a partially threaded shank, allowing the unthreaded section to pass through the components being joined. The external hexagonal head can be tightened using a suitable spanner or socket. It is designed for use with a compatible M12 nut or tapped hole where the application and thread engagement are appropriate.
An M12 A2 Stainless Steel Hexagon Head Bolt is a metric fastener designed to secure components together using a compatible nut or threaded hole. Its six-sided head provides a positive external drive for tightening with a spanner or socket.
The bolt is manufactured from A2 (304) stainless steel, offering corrosion resistance for many general-purpose applications. Its DIN 931 specification identifies a partially threaded hexagon head bolt, with an unthreaded shank between the head and the threaded section.
M12 A2 stainless steel hexagon head bolts are suitable for many general fastening applications where a metric bolt and compatible nut or tapped hole are required. Their partially threaded design can be useful where the unthreaded shank passes through the joined components.
Typical applications may include:
Choose the bolt length, thread engagement and mating fastener to suit the joint. Consider the applied load, material compatibility, operating environment and any relevant engineering requirements before installation.
This bolt is specified to DIN 931, covering metric hexagon head bolts with a partially threaded shank. The following dimensions are standard-based nominal values for the M12 × 50mm size.
A2 stainless steel provides corrosion resistance in many general-purpose environments but is not suitable for every chemical, marine or highly corrosive application. Check the manufacturer's documentation where a specific mechanical property, approval or operating condition is required.
What does M12 mean?
M12 identifies a metric thread with a nominal diameter of 12mm. The standard coarse thread pitch for M12 is 1.75mm.
What does DIN 931 mean?
DIN 931 is the dimensional standard for metric hexagon head bolts with a partially threaded shank.
What spanner size is required?
The standard nominal spanner size for an M12 DIN 931 hexagon head bolt is 19mm across flats.
What is the difference between a bolt and a fully threaded set screw?
A DIN 931 bolt has a partially threaded shank, leaving an unthreaded section beneath the head. A fully threaded fastener has threads extending along the full length of its shank.
What are the benefits of A2 stainless steel?
A2 stainless steel, commonly associated with grade 304, offers corrosion resistance for many general-purpose environments. It is not suitable for every highly corrosive environment.
Can this bolt be used outdoors?
It may be suitable for many outdoor applications, depending on exposure and environmental conditions. Consider the risk of corrosion and the compatibility of the other materials in the assembly.
What nut should be used with this bolt?
Use a compatible M12 metric nut with a matching thread and suitable material and strength properties for the application.
How is the bolt length measured?
For a hexagon head bolt, the nominal length is measured from the underside of the head to the end of the bolt, excluding the head height.
Specifics
Nominal diameter: 12mm (M12)
Overall length: 50mm
Thread length: 30mm nominal
Thread type: Metric coarse thread, 1.75mm pitch
Head type: Hexagon head
Head height: 7.5mm nominal
Spanner size: 19mm across flats
Drive recess: External hexagon
Pack size: Each
Material: A2 (304) stainless steel
Surface finish: Stainless steel finish
Standard: DIN 931
SKU: A2HB12050
Installation: Use a suitable 19mm spanner or socket to tighten the bolt. Select a compatible M12 nut or tapped hole and ensure sufficient thread engagement for the joint. Avoid overtightening, which can damage the threads or joined components. Check the suitability of the fastener, mating components and tightening method for the load and operating environment.
Delivery Options
TC Fixings Ltd offers a range of delivery services across the UK to suit different order sizes and delivery times. Orders are dispatched using reliable courier and postal services to ensure products arrive quickly and safely.
Delivery Summary
Free delivery: Orders over £30 nett qualify for free delivery
Same-day dispatch: Orders placed before 15:00 Monday–Friday are usually dispatched the same day (subject to stock availability)
Collection: Available from our premises
Local delivery: Free van delivery available in Saffron Walden and surrounding villages
Free Delivery
Orders over £30 nett qualify for free delivery.
If your order is close to the threshold, adding additional items may allow you to qualify for free delivery.
Free delivery applies to standard mainland UK delivery only.
Delivery Charges
Orders under £30 nett are subject to carriage charges. Available delivery options are shown below.
Royal Mail Services (Up to 2kg)
| Service | Delivery Time | Cost |
|---|---|---|
| Royal Mail Standard 48 Tracked | 3–5 working days | £4.99 |
| Royal Mail 24 Tracked (Most Popular) | 1–3 working days | £5.99 |
| Special Delivery by 1pm | Next working day | £14.99 |
| Special Delivery by 9am | Next working day | £49.99 |
Royal Mail services are available for consignments up to 2kg.
Courier Services
| Service | Delivery Time | Cost |
|---|---|---|
| Standard Courier | 2–3 working days | £6.98 |
| Express Delivery (Most Popular) | 1–2 working days | £8.99 |
| Next Working Day by 13:00 | Next working day | £10.99 |
| Next Working Day by 11:00 | Next working day | £14.99 |
| Saturday Delivery | Saturday | £9.98 |
Orders placed before 15:00 Monday–Friday are normally dispatched the same working day, subject to stock availability.
Delivery Surcharges
Additional charges may apply in certain circumstances.
Extended Delivery Areas
Orders to the following locations may incur additional delivery charges:
Isle of Wight
Isle of Man
Scottish Highlands
Scottish Isles
Northern Ireland
Channel Isles
These charges will be shown at checkout where applicable.
Long Item Surcharge
Items measuring 1.1 metres or longer are subject to a £12 length surcharge per shipment.
Dispatch Information
Orders placed before 15:00 Monday–Friday are normally dispatched the same working day when all items are in stock.
Orders placed after this time, or on weekends and bank holidays, will be dispatched on the next working day.
Next working day delivery services apply Monday–Friday excluding bank holidays.
Collection
Customers may collect orders from our premises.
Collection orders are normally ready within 1 hour, provided all items are in stock. Please wait for confirmation before travelling to collect your order.
Local Van Delivery
TC Fixings offers a free local van delivery service to customers in Saffron Walden and surrounding villages.
Please contact our team for further information if you are located in this area.
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Quantity WarningPlease be aware that this product only sold in multiples of 0.
Dia M6
Length: 30mm
SKU: A2HB06030
60 In Stock
£34.85
PER 100
Dia M6
Length: 35mm
SKU: A2HB06035
100 In Stock
£29.86
PER 100
Dia M6
Length: 40mm
SKU: A2HB06040
128 In Stock
£43.39
PER 100
Dia M6
Length: 50mm
SKU: A2HB06050
91 In Stock
£44.94
PER 100
Dia M6
Length: 100mm
SKU: A2HB06100
57 In Stock
£110.98
PER 100
Dia M8
Length: 30mm
SKU: A2HB08030
2084 In Stock
£12.00
PER 100
Dia M8
Length: 35mm
SKU: A2HB08035
29 In Stock
£60.96
PER 100
Dia M8
Length: 40mm
SKU: A2HB08040
5629 In Stock
£14.40
PER 100
Dia M8
Length: 50mm
SKU: A2HB08050
137 In Stock
£83.04
PER 100
Dia M8
Length: 60mm
SKU: A2HB08060
106 In Stock
£128.60
PER 100
Dia M8
Length: 80mm
SKU: A2HB08080
33 In Stock
£121.34
PER 100
Dia M8
Length: 100mm
SKU: A2HB08100
52 In Stock
£130.56
PER 100
Dia M8
Length: 120mm
SKU: A2HB08120
239 In Stock
£148.99
PER 100
Dia M10
Length: 45mm
SKU: A2HB10045
Out of Stock
£81.80
PER 100
Dia M10
Length: 50mm
SKU: A2HB10050
140 In Stock
£89.31
PER 100
Dia M10
Length: 65mm
SKU: A2HB10065
16 In Stock
£102.21
PER 100
Dia M10
Length: 75mm
SKU: A2HB10075
18 In Stock
£124.24
PER 100
Dia M10
Length: 80mm
SKU: A2HB10080
66 In Stock
£125.90
PER 100
Dia M10
Length: 100mm
SKU: A2HB10100
64 In Stock
£162.24
PER 100
Dia M10
Length: 120mm
SKU: A2HB10120
48 In Stock
£141.12
PER 100
Dia M10
Length: 130mm
SKU: A2HB10130
50 In Stock
£149.69
PER 100
Dia M10
Length: 140mm
SKU: A2HB10140
21 In Stock
£197.37
PER 100
Dia M10
Length: 150mm
SKU: A2HB10150
50 In Stock
£218.09
PER 100
Dia M12
Length: 50mm
SKU: A2HB12050
6 In Stock
£75.10
PER 100
Dia M12
Length: 60mm
SKU: A2HB12060
3 In Stock
£92.02
PER 100
Dia M12
Length: 70mm
SKU: A2HB12070
15 In Stock
£139.10
PER 100
Dia M12
Length: 100mm
SKU: A2HB12100
9 In Stock
£168.80
PER 100
Dia M12
Length: 120mm
SKU: A2HB12120
11 In Stock
£237.55
PER 100
Dia M12
Length: 130mm
SKU: A2HB12130
31 In Stock
£218.23
PER 100
Dia M12
Length: 140mm
SKU: A2HB12140
27 In Stock
£233.81
PER 100
Dia M12
Length: 150mm
SKU: A2HB12150
22 In Stock
£249.36
PER 100
Dia M12
Length: 160mm
SKU: A2HB12160
Out of Stock
£220.29
PER 100
Dia M12
Length: 180mm
SKU: A2HB12180
27 In Stock
£274.75
PER 100
Dia M12
Length: 200mm
SKU: A2HB12200
13 In Stock
£4.61
EACH
Dia M12
Length: 250mm
SKU: A2HB12250
12 In Stock
£414.00
PER 100
Dia M12
Length: 260mm
SKU: A2HB12260
6 In Stock
£361.49
PER 100
Dia M16
Length: 60mm
SKU: A2HB16060
16 In Stock
£226.30
PER 100
Dia M16
Length: 70mm
SKU: A2HB16070
13 In Stock
£195.00
PER 100
Dia M16
Length: 80mm
SKU: A2HB16080
21 In Stock
£255.44
PER 100
Dia M16
Length: 120mm
SKU: A2HB16120
44 In Stock
£392.28
PER 100
Dia M16
Length: 140mm
SKU: A2HB16140
1 In Stock
£296.82
PER 100
Dia M16
Length: 160mm
SKU: A2HB16160
2 In Stock
£415.80
PER 100
Dia M16
Length: 260mm
SKU: A2HB16260
2 In Stock
£625.68
PER 100
Dia M20
Length: 80mm
SKU: A2HB20080
4 In Stock
£439.20
PER 100
Dia M20
Length: 120mm
SKU: A2HB20120
Out of Stock
£519.98
PER 100
Dia M20
Length: 180mm
SKU: A2HB20180
2 In Stock
£535.14
PER 100
Dia M20
Length: 200mm
SKU: A2HB20200
4 In Stock
£792.00
PER 100
Dia M20
Length: 220mm
SKU: A2HB20220
Out of Stock
£710.64
PER 100
Dia M24
Length: 220mm
SKU: A2HB24220
24 In Stock
£1482.00
PER 100
