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العربية DIN 931 hex cap screws exporter
XZ Fastener exports DIN 931 hex cap screws for distributors, OEM buyers, steel fabricators, construction suppliers, and industrial importers that need metric partial-thread hex fasteners. Export orders require clear control over standard, thread length, shank diameter, grade, finish, packing, and shipment documents. DIN 931 is often selected when the unthreaded shank supports alignment, shear area, or controlled clamping length. Carbon steel, alloy steel, and stainless steel options can be supplied according to order requirement, with inspection focused on dimensions, mechanical properties, coating condition, nut fit, and export labeling.
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Quick Specs
| Стандарт | DIN 931 metric hex head screws and partial-thread hex bolts |
|---|---|
| Strength | Common property classes include 4.8, 5.8, 8.8, 10.9, and 12.9; stainless A2-70 and A4-70 can be supplied according to order requirement |
| Материал | Carbon steel, medium carbon steel, alloy steel, stainless steel 304/A2, stainless steel 316/A4 |
| Finish | Plain, zinc plated, black oxide, hot dip galvanized, zinc flake, nickel plated, passivated stainless steel |
| Приложение | Machinery frames, steel structures, brackets, equipment assembly, construction hardware, maintenance stock, and general fastening |
Importers can compare DIN 931 hex cap screws with other standard fasteners before confirming mixed bolt, nut, washer, and threaded rod requirements.
What Buyers Should Know Before Sourcing DIN 931 Hex Cap Screws
DIN 931 Is a Partial-Thread Hex Fastener
DIN 931 is commonly used for metric hex head fasteners with partial thread and an unthreaded shank. Buyers choose this design when the shank needs to support alignment, pass through a shear plane, or avoid placing threads in a loaded hole.
If the assembly needs full thread, DIN 933 may be the correct alternative. XZ Fastener can help compare related industrial bolts before export production begins.
Export Orders Need Consistent Paperwork
DIN 931 bolts may be described as hex cap screws, partial-thread hex bolts, or metric hex head bolts. The wording should stay consistent across the quotation, invoice, packing list, certificate, and carton labels.
For complete bolted joints, review matching industrial nuts and flat washers early so the exported assembly parts match in grade and finish.
Common Purchasing Descriptions
Clear descriptions help the exporter quote, produce, inspect, pack, and prepare documents correctly. Use separate line items for each size, grade, material, finish, and thread requirement.
| Purchasing Description | Typical Use | Buyer Note |
|---|---|---|
| DIN 931 hex cap screws, M12 x 80 mm, Class 8.8, zinc plated | Steel brackets and machinery frames | Confirm partial thread length and nut engagement |
| DIN 931 partial thread hex bolts, M16 x 100 mm, Class 10.9, plain finish | Higher-strength mechanical assemblies | Confirm material certificate and heat treatment control |
| Metric hex head bolts, DIN 931, M20 x 120 mm, hot dip galvanized | Outdoor steelwork and exposed construction hardware | Confirm matching nut fit after galvanizing |
| DIN 931 stainless steel hex cap screws, M10 x 70 mm, A4-70, passivated | Coastal, wet, or corrosion-prone assemblies | State A2 or A4 clearly on export documents |
| DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts | Related full-thread bolt stock | Use DIN 933 when full thread is required |
| Zinc plated DIN 933 bolts, black oxide DIN 933 bolts, hot dip galvanized DIN 933 bolts | Matching coated bolt inventory | Keep finish wording consistent across all order lines |
When product wording differs between markets, buyers can review the DIN and ISO fastener standards guide before confirming final export descriptions.
Detailed Specifications Table
| Specification Item | Common Options | Export Order Checkpoint |
|---|---|---|
| Стандарт | ДИН 931 | Confirm partial-thread hex head fastener requirement |
| Diameter | M3 to M64 commonly requested; other sizes available upon request | Confirm diameter and thread pitch for each line item |
| Length | Common metric lengths according to order requirement | Measure length from under the head to the bolt end |
| Thread | Metric coarse thread; metric fine thread available upon request | Confirm thread length, shank length, and gauge inspection requirement |
| Strength | 4.8, 5.8, 8.8, 10.9, 12.9, A2-70, A4-70 | Match grade with material, heat treatment, head marking, and certificate |
| Head Style | Hexagon head | Confirm across-flat dimension, head height, and marking requirement |
| Finish | Plain, zinc plated, black oxide, hot dip galvanized, zinc flake, nickel plated, passivated | Confirm coating thickness, appearance, and post-finish nut fit |
| Packing | Cartons, bags, small boxes, pallets, or customer-labeled export packing | Separate by size, grade, finish, batch, and customer item code |
| Documents | Commercial invoice, packing list, certificate of origin, material certificate, inspection report when required | Keep product descriptions consistent for customs and receiving |
Material and Grade Explanation
Carbon Steel and Alloy Steel
Class 4.8 and 5.8 DIN 931 hex cap screws are common for light-duty hardware and general assemblies. Class 8.8 bolts are widely used in steel fabrication, equipment frames, brackets, and construction hardware where reliable mechanical performance is required.
Class 10.9 and 12.9 fasteners need closer control of material, heat treatment, hardness, and plating risk. Buyers can compare related high-strength fasteners before confirming grade and finish.
Stainless Steel Options
A2 stainless steel is suitable for clean indoor and general corrosion-resistant applications. A4 stainless steel is preferred for coastal exposure, wet environments, and more aggressive corrosion conditions.
For stainless DIN 931 hex cap screws, buyers should confirm whether A2-70, A4-70, or another stainless class is required. Export packing should prevent surface contamination and mixed-material handling damage.
Surface Finish Selection Guide
Finish selection affects corrosion resistance, appearance, thread fit, storage life, and installation behavior. The finish name should match the quotation, purchase order, invoice, packing list, label, and inspection report.
| Finish | Typical Use | Export Comment |
|---|---|---|
| Plain | Indoor fabrication, oil-protected stock, or parts for later coating | Needs rust protection for storage and sea freight |
| Zinc Plated | General hardware, equipment assembly, distributor stock | Common choice for clean appearance and moderate protection |
| Black Oxide | Machinery and indoor assemblies requiring dark appearance | Often requires oiling for better storage protection |
| Hot Dip Galvanized | Outdoor structures and exposed construction hardware | Confirm matching nut tolerance after galvanizing |
| Zinc Flake | Higher corrosion resistance with controlled coating build | Available upon request for defined project requirements |
| Passivated Stainless | Stainless steel bolts for clean or corrosive environments | Pack carefully to avoid surface contamination |
For finish comparison across product lines, buyers can review XZ Fastener’s coated fasteners before finalizing the export order.
Manufacturing and Quality Control
DIN 931 hex cap screws are typically produced through wire preparation, cold heading or hot forging depending on size, thread rolling or machining, heat treatment when required, surface finishing, inspection, and export packing. Quality control should cover both the physical fastener and the shipment documents.
- Confirm material grade, wire rod source, and heat number when traceability is required.
- Check head dimensions, across-flat size, length, shank diameter, and thread pitch.
- Confirm partial-thread length and functional thread fit with gauges or matching nuts.
- Inspect mechanical properties, hardness, and head marking for high-strength grades.
- Review coating thickness, appearance, corrosion protection, and post-coating assembly fit.
- Separate packing by size, grade, finish, batch, and customer item code.
- Verify carton labels, pallet marks, inspection reports, invoice, packing list, and shipment documents before delivery.
For non-standard lengths, special thread length, head marking, mixed packing, or project-specific labels, XZ Fastener can discuss the required customized service before production.
Приложения
Machinery and Steel Fabrication
DIN 931 hex cap screws are used in machinery frames, brackets, structural connections, equipment bases, and support plates. The unthreaded shank can help with alignment and may keep threads away from critical shear areas.
Construction and Industrial Import
Distributors and contractors use DIN 931 bolts for steelwork, support hardware, pipe brackets, and general fastening. Buyers often combine them with nuts, washers, and other fastener products for complete shipment planning.
How to Get a Faster Quotation
A complete inquiry helps the exporter quote the correct DIN 931 fastener, prepare packing details, and avoid repeated clarification before shipment.
- Standard: DIN 931 or drawing requirement if modified.
- Size: diameter, pitch, and length, such as M16 x 100 mm.
- Thread requirement: standard partial thread, special thread length, or drawing-based thread length.
- Grade and material: 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, or specified material.
- Finish: plain, zinc plated, black oxide, hot dip galvanized, zinc flake, nickel plated, or passivated.
- Quantity: pieces, cartons, pallets, or container quantity.
- Packing: carton quantity, small box packing, pallet marking, bar code label, or customer label.
- Inspection: material certificate, mechanical test, coating report, gauge check, or third-party inspection if required.
- Export details: destination port, shipping mark, trade term, and required documents.
Часто задаваемые вопросы
What are DIN 931 hex cap screws?
DIN 931 hex cap screws are metric hex head fasteners with partial thread and an unthreaded shank. They are commonly used where alignment, clamping length, or shear area matters.
What is the difference between DIN 931 and DIN 933?
DIN 931 normally refers to partial-thread hex head fasteners, while DIN 933 refers to full-thread hex head fasteners. Buyers should confirm which thread style the assembly requires.
Which grades are commonly exported?
Common grades include 4.8, 5.8, 8.8, 10.9, and 12.9 for carbon or alloy steel. Stainless steel A2-70 and A4-70 can be supplied for corrosion-resistant applications.
Can DIN 931 bolts be hot dip galvanized?
Yes. Hot dip galvanized DIN 931 bolts can be supplied for outdoor and exposed applications. Buyers should confirm coating thickness and matching nut fit after galvanizing.
Can XZ Fastener supply matching nuts and washers?
Yes. Nuts and washers can be quoted as separate line items or packed according to order requirement. Buyers should define nut grade, washer type, finish, and packing method clearly.
What export documents should buyers request?
Common documents include commercial invoice, packing list, bill of lading, certificate of origin when required, material certificate, and inspection report. Product descriptions should match across all documents.
Send Your DIN 931 Hex Cap Screw Export Requirement
For a faster and more accurate quotation, send your size list, finish, quantity, packaging method, and inspection requirements. Include grade, material, thread pitch, thread length, certificate needs, head marking requirements, shipping marks, destination port, and whether matching nuts or washers are required.
Contact XZ Fastener