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3000㎡+
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160
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3500
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Product Picture
Black captive screw
A captive screw (also known as a self-retaining screw or threaded captive fastener) is a specialized fastener designed to remain attached to an assembly even when fully loosened. Unlike traditional screws, it cannot be completely removed, preventing loss or misplacement.
Material: This screw is made of scm435 steel ,with grade 12.9 strength, which is applied in the parts where high tensile strength required.
Surface finish:black oxide, black phospahet, black zinc
Thread : Both imperial and metric thread are available.
standard length from 3mm to 150mm long. Any customized length can be produced.
Head type:Socket cap head,button head ,countersunk head
Drive: Hex, the screw can be installed with a standard hex wrench
Production Process
Quality Control
FAQ
Q1: How do you produce this black captive screw?
A1: We produce this screw by our cold heading machine, Lathe machine to cut the shaft ,and then threading.
Q2: Do you offer custom material?
A2: Yes.
Q3: What's the best choice if I need very good corrosion resistance, such as 1000 hours salt spray testing?
A3: We recommend to do them zinc nickle plating, zinc fake coating.
Q4: Can I do the different colors?
A4: Yes, we recommend to do them aluminum if need them colorful.
Custom Service
All screws are 100% inspected before shipment, please be assured our quality.
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