Galvanized Carbon Steel Black Oxide Slotted Low High Type Knurled Thumb Screws

Product Description

Galvanized Carbon Steel Black Oxide Slotted Low High Type Knurled Thumb Screws is recommended for tool-free covers and inspection panels and related OEM fastening projects where Carbon Steel, Black Oxide, and Flat need to match the final assembly rather than a generic stock screw.

Typical Applications

• Tool-free covers and inspection panels.
• Camera, optical and test fixtures.
• Adjustable equipment assemblies and serviceable hardware.

Parameter Notes for RFQ Review

• Carbon steel is a cost-effective option for strength-focused assemblies and can be paired with protective finishes.
• Black oxide or black zinc improves dark appearance and basic surface protection; confirm corrosion target if used outdoors.
• A flat or countersunk head is selected when the screw needs to sit flush with the surface.
• The listed thread range (M2.5 M2.6 M2.9 M3.5 M3.9 M4.2 M4.8 M5.5) indicates which metric or gauge families can be reviewed for the same product style. The length range (10-55mm) should be checked against clamping thickness, thread engagement and clearance behind the assembly.
• Drive note: Slotted drive. Confirm driver access, assembly torque and whether service teams need matching tools.

Suitable OEM / RFQ Needs

Best fit for OEM/RFQ buyers who need tool-free covers and inspection panels, camera, optical and test fixtures, with review of material (Carbon Steel), finish (Black Oxide), thread range (M2.5 M2.6 M2.9 M3.5 M3.9 M4.2 M4.8 M5.5) and length (10-55mm). Send drawings, target quantity, application load/environment and any sample photos for a practical quotation.

Buyer Questions

• Can this product be customized from a drawing or sample? Yes. XiYu can review drawings or samples for custom dimensions, material, finish, head style and production quantity. For this item, start from the listed Carbon Steel / Black Oxide direction and confirm any changes in the RFQ.
• Is this suitable for tool-free adjustment? Thumb screw geometry is intended for repeated hand operation, covers, fixtures and adjustable hardware. Confirm grip diameter, clearance and thread engagement before production.
• What RFQ information helps speed up quotation? Provide thread size (M2.5 M2.6 M2.9 M3.5 M3.9 M4.2 M4.8 M5.5), length (10-55mm), material, finish, drawing or photo, target quantity, application environment and whether samples are required.
• Can samples be reviewed before bulk production? Sample review can be discussed for custom or production RFQs. For appearance-critical or functional screws, sample approval helps confirm finish, fit and assembly behavior before mass production.