Fornitore all'ingrosso di bulloni esagonali in acciaio inossidabile A4-70
XZ Fastener supplies A4-70 stainless steel hex bolts for wholesale buyers, distributors, maintenance companies, and project contractors that need corrosion-resistant metric hex head bolts in repeatable batches. Orders can be arranged as DIN 933 full thread hex bolts, ISO 4017 bolts, DIN 931 partial thread bolts, or drawing-based stainless fasteners according to order requirement. A4-70 is suitable for many outdoor, coastal, marine, chemical equipment, and machinery assemblies where 316-family stainless steel is preferred. Buyers can source bulloni esagonali in acciaio inossidabile with size lists, packing labels, matching nuts and washers, and inspection documents confirmed before shipment.
Norma
DIN 933 / ISO 4017 filettatura completa; DIN 931 / ISO 4014 opzionale
Forza
A4-70; A4-80 disponibile su richiesta
Materiale
A4 / 316-family austenitic stainless steel
Finisci
Liscio, passivato, decapato e passivato, lubrificato
Applicazione
Marine fittings, outdoor structures, equipment, chemical facilities
Cosa dovrebbero sapere gli acquirenti prima di acquistare bulloni esagonali in acciaio inossidabile A4-70
Wholesale buyers usually care about repeatable size coverage, stable packing, clear labels, mixed-carton control, and reorder consistency. A4-70 stainless steel hex bolts should be specified by standard, diameter, length, thread type, material group, property class, finish, quantity per size, carton weight, pallet method, and inspection requirement.
Confirm the product range
DIN 933 and ISO 4017 are normally used for full thread hex bolts, while DIN 931 and ISO 4014 are used for partial thread hex bolts. For mixed wholesale programs, XZ Fastener can also supply Bulloni a testa esagonale A2 e A4 across multiple sizes.
Separate wholesale stock from project supply
Distributor stock orders often need standard sizes and clear labels, while project supply may require documents, third-party inspection, or special packing. The quotation should match the way the bolts will be received, stored, and resold.
Compare stainless and carbon steel correctly
A4-70 is selected for corrosion resistance. If the buyer needs higher strength and lower cost for dry structural use, Grade 8.8 carbon steel hex bolts may be reviewed separately, with a suitable surface finish.
Descrizioni di acquisto comuni
Accurate descriptions reduce confirmation time and help the supplier prepare the correct wholesale packing. Common purchasing descriptions include:
- A4-70 stainless steel hex bolts DIN 933 full thread, M6-M20 mixed sizes, plain finish, bulk carton packing.
- 316 Bulloni a testa esagonale metrica in acciaio inossidabile ISO 4017, A4-70, passivati, con dadi e rondelle abbinati.
- DIN 931 partial thread A4-70 hex bolts for outdoor equipment and maintenance stock.
- Stainless steel hex cap screws M8 x 25 to M16 x 100, A4-70, carton label and pallet packing required.
- Carbon steel alternatives such as Grade 8.8 carbon steel hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts from the DIN Gamma di bulloni esagonali a filettatura completa 933.
For mixed-material wholesale orders, each item should be listed separately by standard, size, material, grade, finish, packing unit, and label requirement.
Tabella delle specifiche dettagliate
| Articolo | Specifica | Note sull'acquisto all'ingrosso |
|---|---|---|
| Nome del prodotto | Bulloni a testa esagonale in acciaio inossidabile A4-70 | Can be supplied as bolts only or packed with matching nuts and washers. |
| Standard | DIN 933, ISO 4017, DIN 931, ISO 4014, parti basate su disegno | Confirm full thread or partial thread for every size. |
| Gamma di diametri | Common metric sizes such as M3-M36; other sizes reviewed by order | Wholesale programs often focus on high-moving sizes such as M6-M20. |
| Lunghezza | Lunghezze standard o lunghezze personalizzate secondo i disegni | Usa questo guida per la lunghezza della filettatura del bullone when preparing full thread and partial thread lists. |
| Filo | Filettatura metrica grossa; passo fine disponibile su richiesta | Fine pitch must be clearly marked to avoid mixing with coarse thread stock. |
| Materiale | A4 / 316-family austenitic stainless steel | I documenti materiali possono essere discussi prima della conferma dell'ordine. |
| Classe immobile | A4-70 con riferimento ISO 3506 | A4-80 can be reviewed when higher stainless strength is required. |
| Finisci | Liscia, passivata, decapata e passivata, lucidata, lubrificata | Wholesale stock should keep finish names consistent on labels and invoices. |
| Ispezione | Dimensioni, calibri di filettatura, aspetto visivo, documenti sui materiali, rapporti meccanici su richiesta | Inspection scope should be stated before production starts. |
| Imballaggio all'ingrosso | Bulk cartons, small boxes, bags, inner boxes, pallet packing, barcode labels, private labels | Carton weight and label content can be arranged according to order requirement. |
Spiegazione del materiale e del grado
A4 stainless steel is a molybdenum-bearing austenitic stainless group commonly selected where moisture, chloride exposure, marine air, or chemical environments may shorten the service life of carbon steel fasteners. A4-70 indicates both the stainless group and the property class, commonly associated with a minimum tensile strength level of 700 MPa under ISO 3506 reference conditions.
Wholesale buyers often compare A2 and A4 when deciding stock range. A2 can be suitable for many indoor and mild outdoor uses, while A4 is usually preferred for coastal, marine, wastewater, and chemical equipment applications. For deeper material comparison, review XZ Fastener’s guide to Elementi di fissaggio in acciaio inossidabile A2 vs A4.
A4-70 should not be described as a direct replacement for Grade 8.8 carbon steel hex bolts without checking load requirements. Stainless A4-70 offers corrosion resistance, while Grade 8.8 carbon steel offers higher strength and is often combined with zinc plating, black oxide, or hot dip galvanizing.
Wholesale orders can be checked for dimensions, thread fit, surface condition, quantity, labels, and packing requirements before shipment.
Guida alla selezione della finitura superficiale
Most A4-70 stainless steel hex bolts are ordered in plain stainless or passivated finish. Passivation helps remove free iron contamination from the surface and supports the natural stainless protective layer. Pickled and passivated finish may be requested when stronger cleaning is needed. Lubrication or anti-seize preparation can be discussed when galling risk is important.
| Finisci | Tipico uso all'ingrosso | Nota dell'acquirente |
|---|---|---|
| Inossidabile normale | General distributor stock, machinery repair, indoor and mild outdoor use | Common finish for standard stainless wholesale orders. |
| Passivato | Marine air, outdoor equipment, chemical equipment, clean stainless assemblies | Often requested where corrosion resistance and clean appearance are both important. |
| Decapato e passivato | Demanding surface cleaning requirements | Confirm appearance standard and acceptance criteria in advance. |
| Lubrificato | Assemblies with repeated tightening or galling concern | Torque values may change when lubrication is used. |
| Rivestimenti in acciaio al carbonio | Bulloni DIN 933 zincati, ossido nero Bulloni DIN 933, zincati a caldo DIN Bulloni 933 | These are usually selected for carbon steel fasteners rather than A4 stainless steel bolts. |
For broader coating comparison, see XZ Fastener’s guida di finitura del dispositivo di fissaggio.
Produzione e controllo qualità
Wholesale supply starts with a confirmed size list, standard, material grade, finish, quantity per size, packing unit, label format, and inspection requirement. Depending on diameter and length, A4-70 stainless steel hex bolts can be produced by cold heading, hot forging, machining, thread rolling, or thread cutting.
Revisione dell'ordine
XZ Fastener checks the standard, size, thread, finish, tolerance, quantity, carton weight, pallet method, and label requirement. Buyers can also browse broader prodotti di fissaggio per abbinare dadi, rondelle, barre filettate, ancoraggi e viti.
Controllo della produzione
Control points can include head dimensions, across-flat size, thread length, thread gauge fit, surface appearance, burr control, material separation, and mixed-size packing prevention.
Custom wholesale programs
For private labels, special kits, mixed fastener boxes, or non-standard dimensions, XZ Fastener can review elementi di fissaggio personalizzati from drawings, samples, or buyer packing specifications.
Applicazioni
A4-70 stainless steel hex bolts are practical wholesale items for distributors serving maintenance, fabrication, marine, outdoor equipment, and industrial repair markets.
- Equipaggiamento marittimo e strutture costiere
- Attrezzature per il trattamento chimico
- Assemblaggi per esterni in acciaio e alluminio
- Sistemi di trattamento delle acque reflue
- Hardware di supporto per pompa, valvola e tubo
- Strutture di supporto per alimenti e bevande
- Solar mounting and exposed equipment frames
- Maintenance, repair, and distributor stock programs
For submerged seawater, strong chloride chemicals, high-temperature equipment, or critical load-bearing joints, engineering review is recommended before selecting A4-70.
Come ottenere un preventivo più velocemente
A clear wholesale inquiry helps XZ Fastener quote the correct A4-70 stainless steel hex bolts and packing method without repeated clarification. Please provide:
- Elenco taglie, ad esempio M6 x 20, M8 x 30, M10 x 50, M12 x 80.
- Standard, ad esempio DIN 933, ISO 4017, DIN 931, ISO 4014 o numero di disegno.
- Materiale e qualità, ad esempio acciaio inossidabile A4-70, A4-80, A2-70 o 316.
- Requisiti di finitura, come semplice, passivato, decapato e passivato o lubrificato.
- Quantity per size and expected reorder frequency.
- Packaging requirement, including bulk carton, small box, bag, pallet, label, barcode, or private brand packing.
- Requisiti di ispezione, come certificato del materiale, rapporto dimensionale, ispezione visiva o ispezione di terze parti.
- Destination, delivery term, and any carton or pallet weight limits.
For a structured wholesale inquiry, use the richiedi un preventivo page and attach a spreadsheet if the order includes many sizes.
FAQ
Is A4-70 stainless steel suitable for wholesale distributor stock?
Yes. A4-70 stainless steel hex bolts are practical stock items for buyers serving marine, outdoor, chemical equipment, maintenance, and machinery markets. The size range should match the buyer’s local demand and reorder pattern.
Qual è la differenza tra DIN 933 e DIN 931?
DIN 933 usually refers to full thread hex bolts, while DIN 931 usually refers to partial thread hex bolts. Wholesale buyers should separate these standards clearly in stock lists and labels.
Can A4-70 stainless bolts replace Grade 8.8 carbon steel hex bolts?
Not automatically. A4-70 is selected mainly for corrosion resistance, while Grade 8.8 carbon steel hex bolts are selected for higher strength. Load, environment, and assembly requirements should be checked before substitution.
Can XZ Fastener supply small box or private label packing?
Small boxes, bulk cartons, bags, pallet packing, barcode labels, shipping marks, and private label packing can be discussed according to order requirement.
Can matching nuts and washers be packed together?
Yes. Matching stainless hex nuts, flat washers, spring washers, and assembly kits can be supplied according to the bolt standard, thread, material, and packing requirement.
What documents can be requested for wholesale shipments?
Gli acquirenti possono richiedere certificati di test dei materiali, rapporti di ispezione dimensionale, liste di imballaggio, registrazioni di ispezione visiva e altri documenti in base ai requisiti dell'ordine. Le esigenze documentali devono essere confermate prima della produzione.
Can mixed sizes be shipped on one pallet?
Yes, mixed-size pallet packing can be arranged. Buyers should provide carton label format, size separation requirements, pallet weight limits, and receiving instructions to reduce sorting work after delivery.
Send Your Wholesale A4-70 Stainless Hex Bolt Inquiry
Send your size list, finish, quantity, packaging method, and inspection requirements. Include the standard or drawing number, carton label needs, pallet requirements, destination, and whether matching nuts and washers are needed. XZ Fastener will review the details and prepare a quotation according to your order requirement.
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