oil black bolts manufacturer
XZ Fastener manufactures oil black bolts for procurement teams that need a dark, lightly protected finish for machinery, equipment assembly, steel fabrication, and distributor stock. Oil black normally refers to black oxide or blackened carbon steel bolts with a light oil film to improve handling and short-term storage protection. These bolts can be supplied according to DIN, ISO, ASTM, ANSI, GB, or drawing requirements, with full thread, partial thread, metric or inch thread options. Buyers should define grade, dimensions, finish condition, packing, and inspection requirements before bulk production.
المواصفات السريعة
What Buyers Should Know Before Sourcing Oil Black Bolts
Oil black bolts are usually selected when buyers need a dark appearance, moderate short-term rust resistance, and controlled thread fit without thick coating buildup. The finish is often used for indoor machinery, tools, fixtures, equipment frames, and replacement fastener kits. It should not be treated as a heavy outdoor corrosion protection system.
If the order is based on standard hex bolts, buyers may compare requirements with DIN 933 أكسيد أسود مسامير سداسية. For finish comparison, the guide on black oxide vs zinc plated fasteners can help define practical purchasing conditions.
Key Purchasing Checks
- Confirm whether oil black means black oxide with light oil or another blackened process.
- Define bolt standard, thread length, thread pitch, and mating nut requirement.
- State strength grade and whether heat treatment is required.
- Clarify storage period, packing method, and rust prevention requirement.
- Confirm visual acceptance for black shade, oil film, and surface marks.
أوصاف الشراء الشائعة
Buyers may describe the same product as oil black bolts, black oiled bolts, black oxide bolts with oil, blackened carbon steel bolts, black finish hex bolts, or black bolts for machinery assembly. For drawings, it is better to state the finish clearly instead of using only a color description.
Related purchasing phrases may include 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 when comparing different finishes for the same dimensional standard.
جدول المواصفات التفصيلية
| البند | الخيارات المتاحة | ملاحظات المشتري |
|---|---|---|
| نوع المنتج | Hex bolts, flange bolts, carriage bolts, custom bolts, and drawing-based bolts | Provide a drawing for non-standard head, shoulder, shank, or thread design. |
| قياسي | DIN, ISO, ASTM, ANSI, GB, JIS, or customer drawing | Standard selection affects head dimensions, thread length, tolerance, and marking. |
| القطر | M5-M64, 1/4 inch-2 inch, or custom size | Availability depends on grade, length, finish requirement, and order quantity. |
| الموضوع | Metric coarse, metric fine, UNC, UNF, full thread, or partial thread | Thread fit should be checked after blackening and oiling. |
| Mechanical Grade | 4.8, 5.8, 8.8, 10.9, 12.9, ASTM grades, or specified material class | Mechanical properties can be checked according to ISO 898-1 bolt mechanical properties or the agreed standard. |
| إنهاء | Oil black, black oxide with oil, plain black oiled, or custom black finish | Define oil level, black shade, and rust prevention expectation before production. |
| التعبئة والتغليف | Bulk carton, small box, plastic bag, woven bag, pallet, or project packing | Dry inner packing or rust-preventive packing can be supplied according to order requirement. |
| التفتيش | Dimensional, thread, hardness, tensile, proof load, visual finish, and packing checks | Inspection scope should be agreed before quotation for consistent batch control. |
شرح المواد والصف
Oil black bolts are commonly produced from carbon steel and alloy steel. Low and medium carbon steel grades are suitable for general assembly, while Grade 8.8 carbon steel hex bolts and higher-strength grades are used where preload, mechanical strength, or equipment safety requirements are more demanding.
For heat-treated bolts, buyers should define hardness range, tensile strength, proof load, wedge test, and decarburization requirements. Head marking, material certificate, and inspection records can be supplied according to order requirement.
دليل اختيار تشطيب السطح
Oil black is useful for indoor components, machinery assemblies, and fastener stock where dark appearance and light rust prevention are acceptable. For outdoor use, humid storage, or long transit, buyers may need zinc plating, hot dip galvanizing, zinc aluminum coating, or another protective finish.
When selecting a finish for bolts, nuts, and washers as a set, review the دليل اختيار تشطيب السطح. For broader coating comparison, XZ Fastener also provides a دليل طلاء السحابة.
التصنيع ومراقبة الجودة
Production can include raw material inspection, wire preparation, cold heading or hot forging according to size, thread rolling or machining, heat treatment when required, blackening, oiling, inspection, and packing. Buyers should confirm whether the oil film must be light, medium, dry-to-touch, or rust-preventive for long-distance shipment.
Manufacturing Points
- Head forming route selected according to bolt size and steel grade.
- Thread rolling used where suitable for stable thread profile and strength.
- Heat treatment controlled according to mechanical grade requirement.
- Oil black finish applied after surface preparation and cleaning.
نقاط التفتيش
- Across flats, head height, total length, thread length, and shank diameter.
- Go/no-go thread gauge checks and mating nut fit verification.
- Hardness, tensile, proof load, and visual finish checks when required.
- Carton count, inner packing, labels, pallet condition, and shipping marks.
For process planning, buyers can also review how bolts are made through cold heading, thread rolling, and heat treatment.
التطبيقات
Oil black bolts are used in machinery manufacturing, machine tool assembly, fixture building, automotive service parts, agricultural equipment, metal fabrication, indoor steel supports, repair kits, and distributor stock lines. The dark finish also helps identify the bolt type in mixed fastener inventories.
For assemblies exposed to vibration or controlled tightening, buyers should define grade, thread condition, lubrication allowance, and mating nut or washer requirements before ordering.
Typical Buyers
- Industrial fastener distributors
- Machinery and equipment manufacturers
- Steel fabrication workshops
- Automotive and agricultural repair suppliers
- Maintenance and assembly kit packers
كيفية الحصول على عرض أسعار أسرع
A clear inquiry helps XZ Fastener check material, tooling, finish process, packing, and inspection cost quickly. Please send the bolt standard or drawing, diameter, length, thread pitch, grade, material, oil black finish requirement, quantity, destination, packing method, and inspection requirements.
للحصول على استفسار منظم، استخدم RFQ checklist for fastener quality inspection and testing before sending your request.
الأسئلة الشائعة
What does oil black mean for bolts?
Oil black usually refers to black oxide or blackened carbon steel bolts with a light oil film. The finish provides a dark appearance and short-term handling protection, but it is not the same as heavy corrosion protection for outdoor use.
Can oil black bolts be supplied in Grade 8.8?
Yes. Grade 8.8 carbon steel bolts can be supplied with an oil black finish according to standard or drawing requirements. Heat treatment and mechanical test requirements should be confirmed before production.
Are oil black bolts suitable for humid or outdoor environments?
Oil black bolts are generally more suitable for indoor or controlled storage applications. For humid, outdoor, or marine conditions, zinc plated, hot dip galvanized, dacromet, or other protective coatings may be more suitable.
Can XZ Fastener control the oil film level?
Oil film level can be discussed according to order requirement. Buyers should specify whether they need light oil, rust-preventive oil, dry-to-touch packing, or special handling for later assembly.
What information is needed for an oil black bolt quotation?
Please provide the standard, drawing if available, diameter, length, thread type, grade, material, finish requirement, quantity, packing method, destination, and inspection requirements.
Can oil black bolts be packed for distributor stock?
Yes. Oil black bolts can be packed in bulk cartons, small boxes, bags, pallets, or buyer-specified packaging. Label content, carton weight, barcode, and pallet layout are available upon request.
Send Your Oil Black Bolt Inquiry
To receive a practical quotation, send your size list, finish requirement, quantity, packaging method, and inspection requirements. XZ Fastener can review standard bolts, drawing-based bolts, mixed-size orders, and oil black finish requirements according to your purchasing plan.
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