| Material: | Carbon Steel |
|---|---|
| Type: | Round Head |
| Groove: | Plum Flower Head Screw |
| Connection: | Common Bolt |
| Head Style: | Round |
| Standard: | DIN |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier Black Joint Connector Screw Male & Female and Chicago Screw
Black locking screws are used for locking clamp plate nails, ledger mother nail circles, oblique flat head locking screws, and screw accessories for making gun sleeves and scissors. They are made of iron and stainless steel as raw materials, combined with galvanized or nickel plated, gold plated, and stainless steel surface treatment methods, to achieve high hardness and not easily deformed screws, while also having a beautiful appearance. Make the connecting parts tightly bonded and not easy to slip teeth. The black electroplating surface treatment method makes the screws less prone to corrosion and durable. Multiple specifications are available for selection. Welcome to contact us!| SIZE | GRADE | surface | airport |
| M4 | 6.8 | Plain,Zinc Plated,Copper Plating,Phosphating, etc | Ningbo |
| Lock screws | D*L | D*L | D*L | D*L | D*L | D*L |
| 1 | 5*2 | 5*11 | 5*21 | 5*32 | 5*48 | 5*75 |
| 2 | 5*3 | 5*12 | 5*22 | 5*33 | 5*50 | 5*80 |
| 3 | 5*4 | 5*13 | 5*23 | 5*35 | 5*51 | 5*110 |
| 4 | 5*5 | 5*14 | 5*24 | 5*38 | 5*54 | 5*120 |
| 5 | 5*6 | 5*15 | 5*25 | 5*40 | 5*55 | 5*150 |
| 6 | 5*7 | 5*16 | 5*27 | 5*42 | 5*60 | 5*160 |
| 7 | 5*8 | 5*17 | 5*28 | 5*44 | 5*62 | 5*170 |
| 8 | 5*9 | 5*18 | 5*29 | 5*45 | 5*65 | 5*180 |
| 9 | 5*10 | 5*20 | 5*30 | 5*47 | 5*70 | 5*240 |
FAQ
Q1: Are you a factory or trading company?
A: We are the specialized supplier of fastener, can provide the best price.
Q2: How many years you do foreign trade?
A: We have more than 16 years experience in exporting products to worldwide countries; can provide the high quality fastener!
Q3: Do you have enough outputs?
A: We have enough stock in warehouses with abundant capital. We offer 24-hour services.
Q4: How to ensure that every process's quality?
A: Every process will be checked by our quality inspection department which insures every product's quality.
Q5: How to ensure the safety of long-distance transportation?
A: Professional packing teams which keep every packing safely.
Q6: Can you provide some sample?
A: Samples can be provided as your requirements.
Suppliers with verified business licenses
Audited Supplier 
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