Hey man, This is a called a security socket with a pin. You're going to need a special tool to remove this part as it is used for "security". Something like this would do the job https://www.amazon.com/Neiko-01144A-Tamper-Proof-Socket-Pieces/dp/B075JQ9TF5
Pretty sure that is a computer case fan screw. Might have a slightly different head configuration than a standard one, but a standard one would probably work to replace it. What did it come out of and how long is it overall?
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https://www.amazon.com/Computer-Cooling-Mount-Screws-Pack/dp/B01LLKY3GO
It’s likely off a D-SUB harness connector. It probs has a straight slot screwdriver slot on the non threaded side. The threaded side is intended to sit in the D-SUB connector as a captured screw. Normally it would not fall out unless someone took it apart.
Open link and look at pic.
Those are button head shcs, but image is blurry. try a good hardware store or Amazon, the thread is probably 1/4-20
You can buy a little Alan key set
30Pcs Allen Key Set - Metric and Imperial Hex Allen Keys Set with Short and Long Arm (0.7-10mm) and (0.028-3/8inches) - Hex Key Set for Assemble Flat-Pack Furniture, Tighten Fixtures and Fittings https://www.amazon.co.uk/dp/B09NRJ9KR2/ref=cm_sw_r_apan_i_6QE0P0X2P019MWMCCV7R?_encoding=UTF8&psc=1
that has both imperial and metric sets 1 thru to 10 for real cheap. I think it's an essential part of your toolkit...
But if you only work on small items you could also get a miniature screwdriver set with hundreds of 'bits'...
Deal: YINSAN 120 in 1 Precision Screwdrivers Set, Mini Screwdriver Set DIY Repair Tools Kit for iPhone Laptop PC Watch Glasses Xbox and Other Electronices, Small Screwdriver Kit with Magnetic Memory Mat https://www.amazon.co.uk/dp/B0897M7QH4/ref=cm_sw_r_apan_i_dl_TMQ996E6XMBZ92N6W2MD?_encoding=UTF8&psc=1
It should or will have small hex key bits in various small sizes and that looks small. I find this more useful as can do more with it but its only small stuff
With both your an unstoppable loose screw tightening machine
I think it is a screw for composite decking. The flat tip may be that the bottom point was snapped off when it was being screwed in. Those type of fasteners are very brittle and snap off if too much torque is applied.
https://www.amazon.com/Hard-Find-Fastener-014973139162-Composite/dp/B00OP6AGDQ
It’s a one-way screw, there are removal tools, the best one, in my opinion is the carbide insert screw driver.
https://www.grainger.com/product/GRAINGER-APPROVED-One-Way-Screw-Remover-Screwdriver-1ZLA6
But if you’re not planning on reusing the bracket, just cut a slot with a cutoff wheel.
This guy? https://smile.amazon.com/Anderson-Metals-Fitting-Locknut-Female/dp/B00D3CUPAM?sa-no-redirect=1
Unless I’m misunderstanding, these are all over Amazon, and you can definitely get them from any plumbing supply store.
Try something like this Damaged&Stripped Screw Extractor Remover Tool and Drill Bit Set. Broken Bolt Extractor and Screw Remover Set of 6 Pcs https://www.amazon.com/dp/B0883575ZJ/ref=cm_sw_r_cp_api_glt_fabc_6W8QZTG7R5QJN3WY4P8N?_encoding=UTF8&psc=1
4 PCS Sliver Mending Bracket Plate, Stainless Steel 275MM X 45MM X 3MM Heavy Duty Flat Corner Brace for Wood, Metal Straight Fixing Joining Shelf Support Corner for Shelves, Furniture and Cabinet https://www.amazon.com/dp/B07WSBC7Q1/ref=cm_sw_r_cp_api_glt_fabc_W2W5Z6C6WDE7W76ZA3S9
Another option, if the holes are close. But I’d just find some flat stock and mark, drill, countersink. You could go to a sheet metal supplier/machine shop/welding shop and they could shear them to your exact size. I personally wouldn’t pay extra for them to drill the holes, though.
20+ Year Fastener guy here (damn I'm a nerd) :0 Correct: Pancake head used primarily in furniture Amazon Link Cheese head and low profile would have flat parallel sides.
If they fit and work then who cares about the getting the size right? If you still want to verify the size of the threaded stud, get something like this - https://www.amazon.com/Screw-Thread-Metric-Recommends-BCP675/dp/B07K7W3NQQ/ref=pd_sbs_1?pd_rd_w=pU1SS&pf_rd_p=c52600a3-624a-4791-b4c4-3b112e19fbbc&pf_rd_r=JWDMJR24AK3HRHRJ88E1&pd_rd_r=e4ed7ed1-d78e-488d-a0be-6283b0edea54&pd_rd_wg=0ZMJt&pd_rd_i=B07K7W3NQQ&psc=1.
Here are your bolts Furniture-Machine-Fasteners. The whole assembly is called a Joint Connector Bolt or JCB. Your challenge is going to be finding a brass plated barrel end with no drive. Typically these have a hex drive on both ends. I did see blinded ended JCB in black.
looks like 1/4-28 x 1/4 length to me just from some comparing it to the penny. is it around 1/4 long and wide?
Go to the hardware store and buy a nutdriver bit for 5/8", it'll have a 1/4" hex shank on it that'll fit right into that lil B&D you got. This is what they look like: https://www.amazon.com/IVY-Classic-44659-Magnetic-Setter/dp/B07BMZ1YQT/ref=sr_1_2?dchild=1&keywords=5%2F8+nut+driver+bit&qid=1603484819&sr=8-2
They are "push in plastic rivets" but they come in different size and shape ... I would buy a kit with assortment and see which one is the best for your thing.
Good on you for wanting to learn more about what you'll be purchasing and congrats on starting the new job.
https://www.amazon.com/Fastener-Black-Book-Reference-Manual/dp/0958057133 it's a good book I used when I started in this industry.
https://www.fastenal.com/product/fasteners/600000;jsessionid=ZJQgaYGQBpa1+9mgcevbJmuA.443d7b2e-1555-3602-a586-c0d73327934b?categoryId=600000&level=1&fsi=1 Fastenal does a good job of showing application for their different fasteners.
Hopefully this gets you at a good starting point
This product from Amazon is discontinued, but hopefully this gives you a some info to help.
That looks like a screw made special for the trimmers to me. It depends on the thread size, but most hardware stores have "Chicago screw" sets. You can also find them on Amazon. The head is very similar and you might be able to make-do with that.
I just cant believe I can not find a metal swivel anywhere in the color Black.
(dont really care about type of metal at this point).
They seem pretty common as they are on items, like this leash here: