Blog
Trojan Special Fastener is a specialised manufacturer of internally and externally threaded fasteners. We make these in our factory in Birmingham.
M10 GR8 DIN935 SLOTTED NUTS ZINC
Monday 12th December 2022
Yazz
M10 Grade 8 DIN935 Slotted nuts Zinc Cr3 Passivated finish #castlenuts and #slottednuts are used with #cotterpins to secure a nut on a mating part. These are by far the most secure way of ensuring fasteners do not loosen with vibration. Nyloc and all metal prevailing torque locking nuts all have their place but they're still prone to loosening with vibration. Note that DIN935 only allows for Slotted nuts at the M10 size and whilst this can be made into a castle nut it would be a special. We can manufacture slotted and castle nuts from M4 all the way up to M52, and 1/4 to 2.1/4 inches in standard or special sizes. We can do these in left hand as well as oversized…
M16x1.5 special nylon insert nuts to drawing in Brass CZ121
Monday 12th December 2022
Yazz
M16x1.5 special nylon insert nuts to drawing in Brass CZ121 #nylocs are prevailing torque fasteners that have a nylon 6 or 66 ring. This ring deforms when applied to a mating thread and increases friction. This friction creates prevailing torque and thus reduces the ability for the fastener to loosen upon vibration. Nyloc or nylon insert nuts are typically used in continuous service temperatures of between -30 and 95 degrees C. The nuts can withstand use for short periods of up to 165 degrees C but it's not recommended as the ring undergoes thermoplastic deformation at 103 degrees C. For higher temperature use we would recommend either an all-metal prevailing torque locking nut or perhaps one with a ring made from PEEK (PolyEtherEtherKetone)…
M24 DIN934 Nuts made from Aluminium 2011T3
Monday 28th November 2022
Yaz
M24 DIN934 Nuts made from Aluminium 2011T3 Aluminium is not available in hexagon form, so we use a polygon turning process to quickly and efficiently turn a hexagon from round bar. Aluminium isn't the easiest metal to work with in this form - but we produced these nuts within 4 days, which is pretty quick considering the number of processes these nuts undergo for production!
M8 CONNECTOR NUTS (13x16mm THK) BRASS
Tuesday 22nd November 2022
M8 CONNECTOR NUTS in Brass - our customer had a requirement to have 100 of these connector nuts made. We manufactured them within the day and had them ready for collection. Connector nuts are also known as studding connector or connection nuts. These are longer than typical full nuts as they allow the connection of two pieces of studding. Additionally, such long nuts can be used to increase the available proof load of the nut when used on studding - as these are brass, the proof loading figures are quite low, but with increased thread engagement, the proof loading figure also increases.
Castle and Slotted Nuts
Tuesday 8th November 2022
Trojan Special Fasteners Ltd can manufacture all manner of slotted and castle nuts. Castle nuts are typically hex nuts with usually 6 slots (60 degrees apart) in a reduced diameter round section above the wrenching part. When a castle nut (or any radially slotted nut) is applied to a threaded section, it is tightened so that its slot is aligned with a predrilled hole in the bolt or threaded rod, into which a cotter pin, split pin, a lock wire or a spring pin is typically inserted to stop the nut from rotating. These kind of nuts are unsuitable when a specific preload is required because the torque can't be fine-tuned - a result of rotating a nut to align it with…
Hexagon on threaded rod
Thursday 3rd November 2022
Yazz
Our customer tasked us with putting a hexagon face for a spanner on some all thread rods he had. He wanted the biggest hexagon size we could produce on the 30mm allthread bar - knowing that we could produce a proper hexagon, he said he preferred a part threaded' hexagon rod. Have a look at the outcome... we can easily turn hexagon or square on round ends like this.
M14x1.5 to 1/2 BSF Engineering Wheel Studs
Thursday 3rd November 2022
One of our customers had some wheel studs he wanted remade for an old cart. We didn't need him to be an expert because we asked him to send us a stud and we will duplicate it for him - which is exactly what we did. From the day we received the stud, we analysed it's threads and dimensions and set to manufacturing parts for him. He's a happy chappy. Please bare in mind we don't tend to machine many external threads as we specialise in internally threaded fasteners, but for a small run, we can consider doing things like this.
M20x1.5 Special Nuts
Tuesday 1st December 2020
These M20x1.5 special nuts were made for a cheaper price than our customer used to buy these at. Additionally, these type of nuts (with a thin spigot) are used as locking nuts. Typically once these nuts are mounted, the spigot is punched to locate within a groove on a male threaded bolt. We made these within a few days and they were to our customer's drawing and sample.
5/8 UNC Paraboloid Dome Nuts Stainless Steel
Thursday 14th May 2020
5/8 UNC Paraboloid Dome Nuts Stainless Steel It took a while to get the shape of the dome perfectly right, but we managed it in the end and rapidly manufactured these dome nuts in stainless steel. They don't have a typical dome shape - it's more parabolic than rounded, so a much wider forming tool had to be made and shaped to accommodate this. Pretty good job I think. Our customer will no doubt be satisfied with the outcome.
Metric DIN979 Thin Castle Nuts
Thursday 26th July 2018
Bright bar turned DIN 979 Thin castle nuts precision turned for our customer in record time. Trojan Special Fasteners Ltd prides itself on its speed and efficiency.
Phosphor Bronze Metric Nuts
Thursday 26th July 2018
M33 Full nuts machined from diameter PB102 Phosphor Bronze bar. Each of these nuts is precision machined in house by Trojan Special Fasteners Ltd. Increasingly we've found that fewer sizes of Hexagon bar are being produced, so having the ability to produce polygons from round diameter bar is very useful.
Special Screws
Thursday 26th July 2018
Special Screws with mating slotted hex nut portion machined to our customer's specification.
Stay Nuts
Friday 13th July 2018
STAY NUTS Trojan just manufactured some Stay Nuts in three different sizes using the same batch of material. You may notice that dimensionally these nuts are all the same size except for the internal threaded portion - thats different. We manufactured these for a Boiler Restoration specialist based in England who happens to go through so many of these and we're grateful for his custom. Stay nuts are fastened onto Boiler Stay Bolts. Using one across flat (head size) means that tooling is reduced and they can be assembled onto the boiler pretty quickly. These type of nuts are used quite extensively in the railway locomotive boiler restoration industries. They are single chamfer and single countersunk too - just aids application and…
Connector nuts with viewing port
Wednesday 13th June 2018
Trojan just manufactured 4 different sizes of these extra long connector nuts. In addition to having a full thread running the length of these fasteners, we were also tasked to drill a through hole on one face - believed to be an inspection port because they didn't ask for this to be tapped. The fasteners you see here have an M30 thread and are 75 millimeters long with double chamfers.
Published on Fastener and Fixing!
Wednesday 13th June 2018
We have just had an article published on the fastener and fixing website. Do clilck on it to have a look: Fastener and Fixing Website
Special Zinced Spacers
Tuesday 12th June 2018
Check out these beautifully machined spacers. Well, you might ask, why would someone need a spacer? In this instance, they are going to be used to create a space (get it?) between two fixed metal zinced plates, with an M12 bolt that goes through the plate, the spacer, the next plate and is then fastened by one of our M12 All metal prevailing torque locking nuts. Each plate assembly requires four of these spacers for the four bolts that hold the plate apart the required distance for the other moving parts that attach to said plate. We can manufacture spacers from single to multiple thousand quantities, all bright bar turned and in whatever feasible plating or coating we can get from our…
Slotting These Babies
Friday 1st June 2018
Our customer provided us with some lengths of brass all threaded bar - all we had to do was put a slot on one side so that they become little brass grub screws! We can slot, tap, reduce, resize and turn your free issue items.
M16x1.5 special nuts to drawing
Friday 1st June 2018
Fasteners such as these present their own manufacturing problems - such a small wall coupled with a short height mean that we had to manufacture some special tooling in order to just thread them. They're precision machined to perfection and do the job as intended... just hope the customer doesn't over torque them!
ISO9001:2015 Newly Compliant
Monday 19th March 2018
Trojan Special Fasteners just signed off on upgrading their existing ISO 9001:2008 certification to the latest ISO9001:2015 quality management system. We have streamlined our quality processes and made them compliant with the new certification. You can rest assured that we will manufacture high quality fasteners in record time. If you need a copy of our new certificate, please contact us.
M33 Special Square nut with Spigot
Thursday 16th November 2017
What an interesting nut! Our customer wanted a fastener with a turned down spigot on one end and un chamfered square portion. In typical Trojan fashion, we machined the fasteners in record time and they're now awaiting collection. These were turned from a 50mm square steel bar.
Brass Threaded Spacers
Monday 30th October 2017
Our customer provided us with an imported sample nut and asked if we could get close to the product they wanted. The finish on their product was absolutely terrible - and the thread wasn't even centred - to the point where we asked our customer if they wanted an off-centre thread. Thankfully for us, they simply wanted bar turned round threaded spacers - we'd call them round nuts, but everyone has their own name for the wierd and wonderful. Our customer took their first batch only this morning and already they are looking to place an order for more of these!
Pipe Nuts
Monday 30th October 2017
These look strange don't they? Nuts with such a large inner diameter to hexagon across flat - strange, but necessary for our customers who look for fasteners with a BSP or British Standard Pipe Thread form.
12 slotted Nuts
Monday 30th October 2017
12 yes TWELVE slots on a nut so small... Yes, we machined them with accuracy, ease and speed. These type of slotted nuts tend to go on parts where a degree of fine rotation is needed in order to line up the slots with the pin to retain it. We made a new tooling rig just for this job - and so far they have been reordered a number of times already. Suffice it to say, our customer is very happy!
Non Preferred Sizes
Wednesday 25th October 2017
All fastener standards have specific sizes which are commonly used. However, from time to time, non preferred sizes come into play. When the original fastener sizes were being standardised it became necessary to reduce the number of available diameters that one could use. For example when using an M8 or an M10 nut, whats the point of having an M9 nut? It's only a little bit bigger than an M8 - so why not just use an M10 nut. In this way, M8 and M10 became preferred sizes and the M9 became a non-preferred size. This has the consequence that you need to keep a smaller number of spanners in your toolkit, and as anyone will tell you, having fewer…
Slotted Nuts
Thursday 21st September 2017
Slotted nuts are often called castellated nuts. They have slots cut into one side. Typically there are a total of 6 opposing slots, but this number can vary - in very large nuts 8 are common, as well as 2 in smaller nuts.The name comes from the nut's resemblance to the parapet of a typical medieval castle. The slots are designed to align with holes in a mated bolt to accept a cotter pin, a split pin, R-clip or even safety wire to be inserted, which then locks the nut in place and prevents it from loosening and turning. Don't confuse castle nuts with slotted nuts. Castle nuts have a round reduced section formed on the section where the…
5/16 UNF hex set screws 3.1/2 inches long
Thursday 21st September 2017
Whilst making bolts, setscrews and other externally threaded rods is not our speciality, we still managed to precision machine these 3.5 inch long (under the head) hexagon set screws in bright mild steel. Our customer said they needed them quickly and to their drawing with a very short plain section, so in record time, we turned these out. A set screw is a type of screw used to secure an object within or against another object, normally not using a nut. The most common examples are securing a gear or pulley to a shaft.
1.1/4 UNC to M20 Connecting Adapter
Wednesday 13th September 2017
In a cost saving exercise for our customer, we manufactured 4 pieces of the unified to metric threaded hexagon connector nuts. Our customer wished to use a brush head on a device that came in unified form and he could only get the attaching rodwork in metric. We said no problem matey! We figured out the amount of thread engagement he needed and machined a prototype which he tried out - it worked as expected and so we machined a few more! Mixing threads on one kind of nut is not an issue for us. Typically we manufacture a large quantity of right handed to left handed adapters for some of our customers. Be they unified, whitworth or metric thread, let…
M16 SPECIAL FLANGE NUTS IN BRASS
Tuesday 12th September 2017
We recently manufactured a small batch of just 10 flange nuts out of naval brass for one of our customers. Smaller quantities are not an issue and as you can see, the quality is exceptional.
M6 Special Flat Cap/Blind nuts
Monday 17th July 2017
It took us just 2 hours to make a small batch of these cap nuts to our customers sample. He didn't know what thread was being used and he found the cap the sample he had wouldn't go all the way. But we were able to modify the internal thread profile slightly to allow a deeper thread engagement without altering the overall size of the nuts. Another customer happy with our goods that they'll be ordering a much larger quantity from us!
M12x1.75 Male to 1/2 BSW (12tpi) Female adapter with cross thread and grub screw
Thursday 22nd December 2016
A customer asked us to prototype an adaptor of theirs to join two incompatible parts, one with a metric M12x1.75 female thread and the other part with a male 1/2x12tpi BSW thread. We said no sweat. 1 hour later and we have the prototype ready to use along with our suggested cross tapped hole with grub screw for fixing. Not bad I'd say!
1/4 BSF Single Slot special nuts to drawing
Tuesday 13th December 2016
We were provided with a customer's drawing and a sample to work from on this part. It involved a number of different processes, and ensuring the finish was right was key to this product. Trojan drilled, chamfered, turned down, threaded and slotted the nuts so quickly that our customer was surprised the day they landed on his doorstep.
M16x1.5 DIN985 NYLOC NUTS IN BRASS
Monday 12th December 2016
We made some nylon insert nuts in a fine pitch format out of CZ121 (CW614N) hexagon brass bar. These were made to DIN985 standard and are often known as nylock nuts or nyloc nuts. These are a prevailing torque type of nut that uses a nylon ring to create increased torque upon application. When the nut is tightened onto a bolt or setscrew the nylon ring deforms and creates a tight frictional fit which reduces the risk of the nut loosening upon vibration. We typically use Nylon 66 in a natural colour for this. We typically use Tecamid 66 material for this.
M4 to M3 reducing hexagon coupler nut
Thursday 8th December 2016
We just made some M4 to M3 reducing hexagon coupling nuts for one of our regular customers in 303 stainless steel material. The nuts are tapped half way in each thread form from either side. They took a few hours to make and none were rejected during our testing process. This is an example of a special nut made to a customer's verbal specification. We did this without a drawing or a sample. We're trying to make smaller special nuts than our usual size limit. We can make double ended hexagon coupling nuts with any mixture of thread forms on one thread. If you want to mix metric and unified - no problem. If it's machinable, we'll do…
CA104 Nuts
Tuesday 12th July 2016
Our customer free issued a bar of 3 inch diameter CA104 Aluminium Bronze for us to manufacture special M42x3.0 special hexagon nuts to their drawing. Not only was this done with expert precision, but we made these in under a day! Quick, cost effective production just the way we do it!
BSP special nuts in Brass
Tuesday 5th July 2016
We made a small batch of 1/4 BSP nuts to a customer's specification with no external chamfers. These nuts are tiny, but as you can see, they're expertly turned from hex Brass CW614N/CZ121 bars.
Copper Nuts!
Tuesday 5th July 2016
We just manufactured some M10 hex lock nuts to BS3692 standard in Copper C101. Thus was accomplished by machining a round bar of the material into hexagon. Something we do on a regular basis for materials available only in diameter/round bar form. As you can see, the quality is excellent and they were made in record time, specially for our customer.
