4140 alloy steel bolts wholesale supplier for High-Strength Industrial Fastening
XZ Fastener supplies 4140 alloy steel bolts in wholesale quantities for machinery, tooling, heavy equipment, automotive fixtures, construction hardware, mining equipment, and high-load industrial assemblies. Products can be supplied as hex bolts, socket head bolts, flange bolts, shoulder bolts, structural bolts, studs, and made-to-drawing bolts according to order requirement. Buyers can specify AISI 4140 or equivalent grade, heat treatment, property class, thread, length, finish, packaging, inspection level, batch labels, and replenishment schedule. 4140 alloy steel bolts can also be packed with nuts, hardened washers, spacers, anchors, and related منتجات السحابة.
المواصفات السريعة
What Buyers Should Know Before Sourcing 4140 Alloy Steel Bolts
4140 alloy steel bolts are usually selected when the assembly needs higher strength, better toughness, and more stable heat-treatment response than standard carbon steel bolts. Wholesale buyers should confirm material equivalency, heat treatment, tensile requirement, hardness range, thread tolerance, surface finish, packing method, and whether the bolts will be used with hardened washers or high-strength nuts.
For standard hex bolt comparisons, buyers often review DIN 933 موضوع كامل مسامير سداسية و الصف 8.8 فولاذ كربوني مسامير سداسية. For non-standard head dimensions, special shank length, private labels, or customer drawings, XZ Fastener can support السحابات المخصصة.
أوصاف الشراء الشائعة
- Wholesale 4140 alloy steel hex bolts, quenched and tempered, black oxide finish, metric coarse thread.
- AISI 4140 socket head bolts, full thread, plain oiled, packed by part number and barcode label.
- 42CrMo4 high-strength bolts according to drawing, hardness and dimension report available upon request.
- SCM440 flange bolts, zinc plated, supplied with matching nuts and hardened washers.
- Custom 4140 alloy steel shoulder bolts with controlled shank diameter and heat treatment.
- Wholesale order including 4140 alloy steel bolts, 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.
جدول المواصفات التفصيلية
| البند | الخيارات النموذجية | ملاحظات المشتري |
|---|---|---|
| نوع المنتج | Hex bolt, socket head bolt, flange bolt, shoulder bolt, stud bolt, structural bolt, custom bolt | Confirm head style, thread length, shank diameter, and assembly clearance before quotation. |
| المعايير | DIN 931, DIN 933, DIN 912, ISO 4014, ISO 4017, ISO 4762, ANSI, ASTM, ASME, JIS, GB | Provide standard number, diameter, length, thread pitch, and mechanical requirement. |
| مادة | AISI 4140, 42CrMo, 42CrMo4, SCM440, or equivalent alloy steel | Equivalent grades should be confirmed before production when the drawing names a specific standard. |
| القوة | Grade 8.8, 10.9, 12.9, or buyer-defined tensile and hardness requirement | Final class depends on material condition, heat treatment, size, and standard requirement. |
| المعالجة الحرارية | Quenched and tempered, normalized, stress relieved, or according to drawing | Define hardness range, tensile requirement, or proof load requirement when applicable. |
| الموضوع | متري خشن، متري ناعم، UNC، UNF، خيط كامل، قلاوظ جزئي، خيط مخصص | Thread tolerance and thread length should be checked with mating nuts or tapped holes. |
| الانتهاء من السطح | Plain oiled, black oxide, zinc plated, phosphate, Geomet type coating, custom coating | High-strength plated bolts may require hydrogen embrittlement relief according to order requirement. |
| Manufacturing Method | Cold heading, hot forging, CNC machining, thread rolling, heat treatment, coating, sorting | Large size, small batch, or precision shank bolts may require machining or hot forging. |
| التعبئة بالجملة | Bulk carton, inner bag, wooden case, part-number label, barcode label, pallet packing | Heavy bolts should be packed with suitable carton weight limits and pallet protection. |
| التفتيش | Dimension check, thread gauge, hardness check, tensile or proof load test, coating check, visual sorting | يمكن إعداد تقارير التفتيش وفقًا لمتطلبات الطلب. |
For made-to-drawing parts, buyers can prepare material, hardness, and heat-treatment notes with XZ Fastener’s guide to متطلبات المواد السحابة المصنوعة حسب الرسم.
شرح المواد والصف
4140 is a chromium-molybdenum alloy steel commonly selected for strength, toughness, and heat-treatment response. Equivalent or related grades such as 42CrMo, 42CrMo4, and SCM440 may be reviewed according to drawing requirement and buyer approval. Compared with ordinary medium carbon steel, 4140 can provide better hardenability for larger or higher-load bolts.
Buyers should define the final mechanical target rather than only naming the material. Tensile strength, hardness range, proof load, impact requirement, and operating temperature may affect the suitable heat-treatment condition. XZ Fastener can review raw material inspection requirements before production when traceability is needed.
دليل اختيار تشطيب السطح
- Plain oiled: Common for indoor storage, machining parts, and buyer-controlled finishing.
- أكسيد أسود: Often selected for tooling, machinery, fixtures, and indoor high-strength bolts.
- مطلي بالزنك: Used for general corrosion resistance, with relief treatment considered for high-strength items.
- Phosphate and oil: Suitable for selected mechanical assemblies requiring a darker, oil-retaining surface.
- Geomet type coating: Available upon request for selected corrosion resistance and hydrogen embrittlement control needs.
- Hot dip galvanizing: Can be reviewed for some larger bolts, but thread fit and mechanical requirements must be confirmed first.
التصنيع ومراقبة الجودة
4140 alloy steel bolt production can include bar or wire material preparation, cold heading, hot forging, CNC machining for special shapes, thread rolling, heat treatment, surface finishing, sorting, and wholesale packing. Important control points include material confirmation, head dimensions, thread fit, straightness, heat-treatment uniformity, hardness, tensile or proof load requirement, coating condition, and package protection.
XZ Fastener checks production dimensions, thread gauges, hardness, surface appearance, packing labels, carton quantity, and inspection documents according to the purchase order. Buyers can review XZ Fastener’s مراقبة جودة السحابة notes when preparing inspection requirements for 4140 alloy steel bolts.
التطبيقات
الآلات الثقيلة
Used in equipment frames, gearboxes, presses, mounting blocks, fixtures, and high-load service parts.
Tooling and Molds
4140 bolts can be specified for tooling plates, clamping fixtures, and assemblies requiring strength and toughness.
Automotive Fixtures
Used in brackets, jigs, repair hardware, and performance-related assemblies according to design requirement.
Mining and Energy Equipment
Suitable for selected harsh-duty equipment where alloy steel strength and heat treatment are required.
أجهزة البناء
Can be reviewed for heavy brackets, base plates, support frames, and engineered bolted joints.
مخزون الموزع
4140 bolts can be packed with matching nuts, washers, barcode labels, and part-number bags for wholesale replenishment.
كيفية الحصول على عرض أسعار أسرع
For standard 4140 alloy steel bolts, send the standard number, bolt type, diameter, length, thread pitch, thread length, material grade, heat treatment, finish, quantity, packaging method, carton label details, and inspection requirement. For custom bolts, include a drawing, sample photo, head dimensions, shank diameter, shoulder length, thread tolerance, hardness range, tensile requirement, and assembly purpose.
For wholesale assembly orders, list matching nuts, washers, packaging labels, carton weight limits, pallet requirements, and inspection documents. Buyers can اتصل بـ XZ Fastener with drawings and order details for review.
الأسئلة الشائعة
Can XZ Fastener supply 4140 alloy steel bolts in wholesale quantities?
Yes. 4140 alloy steel bolts can be supplied in wholesale quantities according to drawings, samples, standards, or detailed size lists. Please provide material grade, dimensions, thread, heat treatment, finish, quantity, packaging, and inspection requirements.
What equivalent materials can be reviewed for AISI 4140 bolts?
Depending on the drawing and buyer approval, equivalent or related materials such as 42CrMo, 42CrMo4, and SCM440 can be reviewed. Final material confirmation should be made before production.
Can 4140 alloy steel bolts be supplied as Grade 10.9 or 12.9?
Grade 10.9 or 12.9 requirements can be reviewed according to bolt size, material condition, heat treatment, and applicable standard. Buyers should specify tensile, proof load, and hardness requirements when needed.
Can 4140 alloy steel bolts be packed by size, barcode, or part number?
Yes. 4140 alloy steel bolts can be packed in bulk cartons, inner bags, wooden cases, kit bags, or palletized cartons. Labels by size, barcode, part number, quantity, and order reference can be arranged according to order requirement.
Can 4140 alloy steel bolts be supplied with nuts and washers?
Yes. 4140 alloy steel bolts can be packed with matching nuts, hardened washers, flat washers, spacers, anchors, and other hardware. Please provide the full assembly list, finish, quantity, and packaging method.
What inspection items are common for 4140 bolts?
Common inspection items include material confirmation, dimensions, thread gauge, hardness, visual appearance, coating check, and mechanical testing when required by the order or drawing.
Send Your 4140 Alloy Steel Bolt Wholesale Inquiry
For a faster quotation, send your size list, standard number, material grade, heat treatment, finish, quantity, packaging method, and inspection requirements. If available, include drawings, samples, assembly photos, mating nut and washer details, labels, or part numbers so XZ Fastener can check the production route and wholesale packing plan.
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