black oxide set screws manufacturer
XZ Fastener manufactures black oxide set screws for shaft collars, gears, pulleys, knobs, couplings, fixture blocks, handles, and machinery assemblies where a compact headless fastener must lock against a shaft or mating surface. Cup point, flat point, cone point, dog point, knurled cup point, and custom set screws can be supplied according to DIN, ISO, ANSI, drawing, sample, material grade, finish, quantity, packaging, and inspection requirement. Black oxide with oil can provide a clean dark appearance, mild corrosion protection, and controlled dimensions for accurate internal hex drive and thread fit.
Quick Specs
What Buyers Should Know Before Sourcing Black Oxide Set Screws
Set screws are small but function-critical parts. The point style, hex socket quality, thread tolerance, hardness, and finish all affect how the screw locks against the mating surface. A cup point provides strong holding force for many shaft applications, while flat point, cone point, and dog point styles are chosen for different contact and positioning needs.
Before ordering, buyers should confirm the standard, diameter, length, thread pitch, point type, material, strength grade, black oxide oil requirement, drive size, and packaging method. Related fastener products can be reviewed when the same assembly also needs bolts, washers, nuts, or custom hardware.
Common Purchasing Descriptions
- Black oxide socket set screws with cup point
- DIN 916 alloy steel set screws, class 45H, black finish
- Flat point black oxide set screws for adjustable positioning
- Cone point set screws for shaft marking and stronger bite
- Dog point set screws for locating holes and repeat assembly
- Custom black oxide set screws made to drawing
Related Fastener Sourcing
Buyers can compare standard socket set screw options and nylon tip set screw choices when surface protection or reduced shaft marking is required. For projects that also include external hex bolts, XZ Fastener can discuss DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts.
Detailed Specifications Table
| Artículo | Opciones disponibles | Buyer Notes |
|---|---|---|
| Tipos de producto | Cup point, flat point, cone point, dog point, half dog point, knurled cup point, nylon tip, custom point | Point style should match shaft material, holding force, and marking allowance. |
| Estándares | DIN 913, DIN 914, DIN 915, DIN 916, ISO 4026, ISO 4027, ISO 4028, ISO 4029, ANSI, custom drawing | Specify the exact standard and revision where required. |
| Thread Range | Metric coarse, metric fine, UNC, UNF, and special thread available upon request | Confirm diameter, length, pitch, tolerance class, and thread gauge requirement. |
| Tipo de transmisión | Hex socket, Torx socket, slotted, or special drive according to drawing | Hex socket depth and across-flat dimension are important for torque transfer. |
| Materials | Alloy steel, carbon steel, stainless steel, brass, or buyer-specified material | Material should match strength, corrosion exposure, and shaft contact requirement. |
| Strength and Hardness | 45H, 14H, 22H, stainless grades, or drawing-specified hardness | Hardness testing can be arranged according to order requirement. |
| Acabado superficial | Black oxide with oil, plain, zinc plated, nickel plated, phosphate, or other finishes | Black oxide is mainly for appearance and mild protection; stronger corrosion resistance may need another finish. |
| Packaging | Bulk carton, small box, plastic bag, kit packing, barcode label, pallet packing | Small sizes should be packed with clear labels and item separation for warehouse receiving. |
Material and Grade Explanation
Alloy steel set screws are commonly used when high hardness and strong point contact are required. Carbon steel can be used for general industrial assemblies, while stainless steel may be selected where corrosion resistance is more important than very high point hardness. Brass and nylon tip designs are used for applications where the mating surface should be protected.
For non-standard geometry, buyers should provide point angle, socket depth, thread tolerance, hardness, finish, and burr control notes. Drawing-based set screws can be reviewed as part of custom fasteners made to drawing, especially when shaft contact, locking function, or assembly tool access is critical.
Surface Finish Selection Guide
Black oxide is a dark conversion finish commonly used on alloy steel set screws. It provides a clean black appearance and mild corrosion protection when used with oil. Because the coating build-up is low, it is suitable for set screws where thread fit and socket dimensions must remain stable.
When the assembly requires higher corrosion resistance, buyers may compare black oxide with zinc plating, nickel plating, phosphate, stainless steel, or other finishes. The black oxide vs zinc plated fasteners guide and the surface finish comparison chart can help buyers choose a suitable finish for storage, handling, and service environment.
Manufacturing and Quality Control
Production may include wire or bar selection, cold forming or machining, thread rolling or thread cutting, socket forming, point forming, heat treatment, black oxide finishing, oiling, sorting, inspection, and packing. The process route depends on size, point style, material, hardness, and tolerance requirement.
Common inspection points include thread gauge, diameter, length, socket size, socket depth, point angle, point concentricity, hardness, black oxide appearance, oil coverage, burr control, and packing quantity. Thread inspection can follow methods described in thread inspection methods for fastener quality control.
Aplicaciones
- Shaft collars, pulleys, sprockets, gears, and hubs
- Handles, knobs, levers, couplings, and adjustable stops
- Fixture blocks, machine tools, positioning parts, and automation equipment
- Motor assemblies, power transmission components, and maintenance kits
- Industrial hardware where headless screws save space
- Custom assemblies requiring special points or controlled hardness
How to Get a Faster Quotation
To receive a faster quotation, send the standard, diameter, length, thread pitch, point type, drive type, material, hardness or strength class, black oxide requirement, quantity by size, packaging method, inspection requirement, and destination. If the set screw must match an existing shaft, include shaft material, shaft diameter, torque requirement, and whether marking is acceptable.
Buyers preparing a full order can use the fastener quality inspection checklist and submit drawings or size lists through the request a quote page.
Preguntas frecuentes
What information is needed to quote black oxide set screws?
Please provide the standard, size, thread pitch, length, point type, drive type, material, hardness class, finish requirement, quantity, packaging, inspection requirement, and delivery destination.
Which point style should I choose for set screws?
Cup point is widely used for strong holding force, flat point is useful where surface marking should be reduced, cone point provides a stronger bite, and dog point is used for locating holes or repeat positioning.
Is black oxide suitable for outdoor use?
Black oxide with oil provides mild corrosion protection and a dark appearance. For outdoor or wet environments, buyers should consider zinc plating, stainless steel, or other finishes according to the service condition.
Can black oxide set screws be supplied according to custom drawings?
Yes. Custom point styles, special lengths, special threads, socket changes, and material requirements can be discussed according to drawing, sample, quantity, and inspection requirement.
What quality checks are important for socket set screws?
Important checks include thread gauge, length, socket size, socket depth, point shape, hardness, burr control, black oxide appearance, oil coverage, and packing quantity.
Can XZ Fastener pack set screws for distributor stock?
Yes. Set screws can be packed in bulk cartons, small boxes, bags, barcode labels, kits, or palletized export packing according to buyer requirement.
Send Your Black Oxide Set Screw Requirement
Send your size list, finish requirement, quantity, packaging method, and inspection requirements. XZ Fastener can review standard black oxide set screws, special point set screws, and custom set screw drawings according to order requirement.
- Size list with diameter, length, thread pitch, point type, and drive type
- Finish details including black oxide, oil requirement, appearance, and sample requirement
- Quantity by item and expected packaging method
- Inspection requirements such as thread gauge, socket size, hardness, point shape, and packing check
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