DIN 931 Grade 8.8 produttore di bulloni esagonali
XZ Fastener supplies DIN 931 Grade 8.8 hex bolts for machinery frames, steel structures, equipment bases, bridge components, guardrail systems, and industrial maintenance programs. DIN 931 is a metric partial thread hex head bolt standard, commonly referenced with ISO 4014, and Grade 8.8 is selected where higher tensile strength is required than general low-carbon fasteners. Buyers can specify diameter, length, thread pitch, finish, matching nuts and washers, packing format, and inspection documents according to project or distributor requirements.
Specifiche rapide
What Buyers Should Know Before Sourcing DIN 931 Grade 8.8 Hex Bolts
DIN 931 Grade 8.8 hex bolts are partial-thread bolts. They are often chosen when the unthreaded shank must pass through the shear plane or when the assembly requires a stronger bearing area than a fully threaded bolt can provide. Before confirming an order, buyers should check grip length, thread length, nut engagement, washer selection, finish thickness, and the working load condition.
Partial Thread Matters
The unthreaded shank helps reduce thread contact inside the clamped hole and can improve alignment in structural or mechanical assemblies. For mixed assemblies, compare DIN 931 with DIN 933 rispetto a DIN 931 prima di modificare le specifiche.
Grade 8.8 Needs Controlled Processing
Grade 8.8 carbon steel hex bolts are normally heat treated to meet mechanical properties. Buyers should confirm whether hardness, tensile testing, material certificates, coating thickness, or third-party inspection will be required before production.
Per un riferimento completo al prodotto, vedere XZ Fastener’s DIN 931 ISO 4014 bullone a testa esagonale page with partial thread, Grade 8.8, zinc, black oxide, and HDG options.
Descrizioni di acquisto comuni
Importers, project buyers, and maintenance teams may describe the same DIN 931 Grade 8.8 hex bolts in different ways. A clear purchasing description should include the standard, size, strength class, finish, and whether matched nuts and washers are required.
- DIN 931 Grade 8.8 hex bolts, M16 x 80, zinc plated, partial thread
- DIN 931 / ISO 4014 metric hex head bolts, Grade 8.8 carbon steel, black oxide finish
- Bulloni a testa esagonale in acciaio al carbonio Grade 8.8 con dadi DIN 934 e rondelle piatte
- DIN 931 partial thread hex head bolts for machinery base assembly
- Hot dip galvanized DIN 931 Grade 8.8 bolts for outdoor steel structure use
For buyers also purchasing DIN 933 full thread hex bolts, XZ Fastener can help align partial thread DIN 931 sizes with fully threaded items in the same stock program.
Tabella delle specifiche dettagliate
| Articolo | Requisito tipico | Note dell'acquirente |
|---|---|---|
| Norma | DIN 931, commonly referenced with ISO 4014 | Confirm project drawings if strict standard interchangeability is required. |
| Tipo di bullone | Bullone a testa esagonale con filettatura parziale | Do not substitute DIN 933 full thread hex bolts unless the assembly design allows it. |
| Classe di forza | Grade 8.8 / property class 8.8 | Mechanical properties should follow the applicable standard and inspection requirement. |
| Materiale | Carbon steel or alloy steel suitable for Grade 8.8 heat treatment | Material certificate and heat number traceability can be supplied according to order requirement. |
| Gamma di diametri | Dimensioni metriche comuni come da M6 a M36; altre dimensioni esaminate tramite richiesta | MOQ may vary by diameter, length, material, and finish. |
| Intervallo di lunghezza | Standard DIN 931 lengths and project-specific size lists | Thread length should be checked against grip thickness and nut engagement. |
| Filo | Filettatura metrica grossa come fornitura comune; passo fine disponibile su richiesta | Indicare chiaramente il passo per i bulloni a testa esagonale metrici non standard o a filettatura fine. |
| Finisci | Plain, zinc plated, black oxide, hot dip galvanized, zinc flake, or other coating | Coating thickness affects thread fit, appearance, corrosion resistance, and cost. |
| Componenti abbinati | DIN 934 dadi, rondelle piatte, rondelle elastiche o rondelle temprate | Matched bolt-nut-washer sets reduce receiving and assembly mismatch. |
| Ispezione | Dimensions, thread gauge, hardness, tensile test, coating checks, packing checks | Define the inspection scope before production to avoid shipment delays. |
Spiegazione del materiale e del grado
Grade 8.8 indicates a high-strength metric bolt property class commonly used for steel structures, machinery, brackets, and heavy equipment assemblies. In practical purchasing, Grade 8.8 carbon steel hex bolts should be evaluated by mechanical properties, heat treatment consistency, thread quality, surface finish, and nut compatibility.
The grade is not only a marking on the bolt head. Buyers should confirm the standard, material route, hardness range, tensile requirement, and whether documentation is needed for project records. For a deeper grade comparison, XZ Fastener provides a practical guide on Proprietà meccaniche dei bulloni 8.8, 10.9 e 12.9.
Guida alla selezione della finitura superficiale
Surface finish should be selected according to installation environment, expected storage time, appearance requirement, and assembly method. DIN 931 Grade 8.8 hex bolts can be supplied with several finishes, but each option has different corrosion performance and thread-fit considerations.
| Finisci | Uso adatto | Considerazione sull'acquisto |
|---|---|---|
| Zincato | Indoor equipment, warehouse stock, general machinery, light corrosion conditions | Good appearance and common availability; for related fully threaded parts, see Bulloni DIN 933 zincati. |
| Ossido nero | Interni di macchinari, assemblaggi oliati, requisiti di aspetto nero | Limited corrosion protection unless oil or extra protection is applied; bulloni ossido nero DIN 933 may be purchased together for mixed thread-length programs. |
| Zincato a caldo | Outdoor steelwork, guardrail systems, solar brackets, exposed assemblies | Thicker zinc layer improves corrosion allowance, but thread fit and nut matching should be confirmed. Buyers may also compare hot dip galvanized DIN 933 bolts for full-thread needs. |
| Dacromet o lamelle di zinco | Outdoor or equipment applications requiring higher corrosion performance and controlled coating build-up | Cost, color, friction behavior, and salt spray requirement should be stated in the RFQ. |
Per una selezione di rivestimenti più ampia, rivedere XZ Fastener’s guida per il rivestimento degli elementi di fissaggio before finalizing the finish requirement.
Produzione e controllo qualità
DIN 931 Grade 8.8 hex bolts usually involve wire preparation, heading or forging depending on size, shank and thread forming, heat treatment, surface finishing, inspection, and packing. Quality control should focus on the dimensions that affect fit and the mechanical properties that affect service performance.
- Across-flats width, head height, shank diameter, total length, and thread length checks
- Thread gauge inspection for correct pitch and fit with matched nuts
- Hardness and tensile testing when required by project or buyer specification
- Coating appearance, coverage, thickness, and thread build-up review
- Separazione delle dimensioni, peso del cartone, marcatura dei pallet e controlli di identificazione dei lotti
For mixed stock requirements involving both partial-thread and full-thread bolts, XZ Fastener can review Bulloni a testa esagonale DIN 931 e DIN 933 Grade 8.8 in the same inquiry.
Applicazioni
Steel Structures and Frames
DIN 931 Grade 8.8 bolts are used in steel frames, support brackets, guardrails, and fabricated structures where a partial-thread shank is preferred through the grip area.
Macchinari e attrezzature
Metric hex head bolts in Grade 8.8 are common in machinery bases, conveyors, agricultural equipment, industrial skids, and maintenance replacement lists.
Edilizia e infrastrutture
With suitable finish selection, DIN 931 bolts can be supplied for outdoor construction hardware, support plates, steel brackets, and project fastener kits.
Programmi azionari dei distributori
Importers and wholesalers can request mixed sizes, matched nuts and washers, carton labels, pallet marks, and repeat stock lists according to local demand.
Come ottenere un preventivo più velocemente
A complete RFQ helps XZ Fastener check production route, surface finish, packing cost, and delivery schedule quickly. If drawings or project standards are available, attach them with the size list.
- Standard: DIN 931, ISO 4014 o riferimento disegno acquirente
- Size list: diameter x length, such as M10 x 60, M12 x 80, M16 x 100
- Strength: Grade 8.8, or another property class if required
- Finish: plain, zinc plated, black oxide, hot dip galvanized, Dacromet, or other coating
- Quantity: quantity per size and total expected order volume
- Matched parts: nuts, washers, spring washers, hardened washers, or assembled kits
- Packaging: bulk carton, small box, woven bag, pallet, label, barcode, or project mark
- Requisiti di ispezione: certificato del materiale, rapporto dimensionale, durezza, prova di trazione, spessore del rivestimento, nebbia salina o ispezione di terze parti
Send the details through the richiedi un preventivo pagina o contattare XZ Fastener for a direct review of DIN 931 Grade 8.8 hex bolts and related fastener products.
FAQ
What is the difference between DIN 931 and DIN 933 hex bolts?
DIN 931 is a partial-thread hex head bolt, while DIN 933 is a full-thread hex head bolt. DIN 931 is often used when an unthreaded shank is preferred through the clamped parts, while DIN 933 full thread hex bolts are useful when full thread engagement is needed across shorter or variable grip lengths.
Can DIN 931 Grade 8.8 hex bolts be supplied with nuts and washers?
Yes. DIN 934 hex nuts, flat washers, spring washers, and hardened washers can be supplied according to order requirement. Matched sets are recommended when thread fit, coating thickness, or project receiving control is important.
Which finish should I choose for Grade 8.8 DIN 931 bolts?
Zinc plated finish is common for indoor use, black oxide is often selected for machinery appearance, and hot dip galvanizing is usually preferred for outdoor exposure. Dacromet or zinc flake coatings can also be reviewed when higher corrosion resistance is required.
Are Grade 8.8 bolts suitable for structural applications?
Grade 8.8 bolts are widely used in structural and machinery applications, but final suitability depends on the project standard, load condition, installation method, nut and washer selection, and required inspection documents.
Can XZ Fastener supply DIN 931 bolts in custom lengths?
Standard DIN 931 sizes are common, and custom or less common lengths can be reviewed according to diameter, quantity, material, and finish. A drawing or complete size list helps confirm feasibility.
What documents can be requested with DIN 931 Grade 8.8 hex bolts?
Depending on the order, buyers may request material certificates, dimensional reports, hardness results, tensile test reports, coating thickness checks, packing photos, or third-party inspection support.
Send Your DIN 931 Grade 8.8 Hex Bolt Inquiry
For a faster quotation, send your size list, finish, quantity, packaging method, and inspection requirements. XZ Fastener can review DIN 931 Grade 8.8 hex bolts, matched nuts and washers, metric hex head bolts, DIN 933 full thread hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, hot dip galvanized DIN 933 bolts, and related Grade 8.8 carbon steel hex bolts according to your purchasing plan.
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