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Русский DIN 931 partial thread hex bolts supplier
XZ Fastener supplies DIN 931 partial thread hex bolts for industrial buyers who need reliable metric hex head bolts for machinery, steel structures, equipment frames, brackets, and maintenance stock. DIN 931 is commonly referenced with ISO 4014 and is selected when the unthreaded shank should pass through part of the clamped assembly. Grade 8.8 carbon steel hex bolts, zinc plated, black oxide, hot dip galvanized, plain, and other finishes can be supplied according to order requirement. Buyers can send size lists, finish details, quantity, packaging needs, and inspection requirements for quotation review.
Quick Specs
What Buyers Should Know Before Sourcing DIN 931 Partial Thread Hex Bolts
DIN 931 partial thread hex bolts are different from fully threaded bolts. The plain shank can improve bearing in the clamped hole and is often preferred when the shear plane should not pass through threads. Before purchase, buyers should check grip length, thread length, nut engagement, washer selection, coating thickness, and whether the assembly truly needs partial thread or full thread.
Partial Thread Selection
DIN 931 is commonly used when the unthreaded shank should sit inside the clamped materials. If the assembly requires thread along the full bolt length, compare it with DIN 933 versus DIN 931 before changing the bill of materials.
Grip Length and Fit
Grip length matters more on DIN 931 than on DIN 933 full thread hex bolts. The selected bolt length should leave enough thread engagement for the nut without placing unnecessary threads in the shear area.
For a close product reference, see XZ Fastener’s DIN 931 ISO 4014 hex head bolt page with partial thread and multiple grade and finish options.
Common Purchasing Descriptions
DIN 931 partial thread hex bolts may be described in different ways by distributors, contractors, and equipment manufacturers. Clear purchasing descriptions reduce wrong shipments and make the quotation process faster.
- DIN 931 partial thread hex bolts, M12 x 80, Grade 8.8, zinc plated
- DIN 931 / ISO 4014 metric hex head bolts, carbon steel, partial thread
- Grade 8.8 carbon steel hex bolts with DIN 934 nuts and flat washers
- Black oxide DIN 931 hex bolts for machinery assembly
- Hot dip galvanized DIN 931 bolts for outdoor steel bracket installation
- DIN 931 and DIN 933 full thread hex bolts packed together for distributor stock
When both partial and full-thread bolts are needed, XZ Fastener can also review DIN 933 full thread hex bolts for matched material, finish, and packing requirements.
Detailed Specifications Table
| عنصر | Typical Requirement | Buyer Notes |
|---|---|---|
| قياسي | DIN 931, ISO 4014 reference where applicable | Confirm drawing requirements if strict dimensional interchangeability is required. |
| Bolt Type | Hex head bolt with partial thread | Confirm the unthreaded shank length before substituting with fully threaded bolts. |
| نطاق القطر | Common metric sizes such as M6 to M36; other sizes reviewed by inquiry | MOQ depends on size, length, material, grade, and surface finish. |
| نطاق الطول | Standard DIN 931 lengths and project size lists | Provide diameter x length for each item, such as M10 x 70 or M16 x 120. |
| Thread | Metric coarse thread as common supply; fine pitch available upon request | State pitch clearly if the order is not standard coarse thread. |
| Strength Class | 4.8, 8.8, 10.9; other requirements reviewed by order | For Grade 8.8 carbon steel hex bolts, mechanical testing can be arranged according to order requirement. |
| مادة | Carbon steel, alloy steel, stainless steel | Material selection should match strength, corrosion exposure, and project standard. |
| Finish | Plain, zinc plated, black oxide, hot dip galvanized, Dacromet, Geomet | Coating thickness can affect thread fit, nut matching, appearance, and cost. |
| Matching Parts | DIN 934 nuts, flat washers, spring washers, hardened washers | Matched sets help reduce assembly mismatch and receiving errors. |
| Inspection | Dimensions, thread gauge, hardness, tensile test, coating thickness, packing check | Inspection scope should be confirmed before production. |
For grip and thread selection, buyers can review this bolt thread length guide before preparing a mixed DIN 931 and DIN 933 size list.
Material and Grade Explanation
Carbon steel is commonly used for DIN 931 partial thread hex bolts because it can meet practical strength and cost targets for machinery and construction projects. Grade 4.8 may be enough for general fastening, while Grade 8.8 carbon steel hex bolts are often selected for stronger equipment, bracket, and steel frame assemblies. Grade 10.9 can be reviewed when higher strength is needed and the application allows it.
Grade selection should consider working load, mating material, tightening method, washer use, and surface finish. Higher grade does not automatically mean better performance in every joint. For comparison across high-strength bolt classes, see XZ Fastener’s guide to 8.8, 10.9, and 12.9 bolt mechanical properties.
Surface Finish Selection Guide
The finish should be selected according to corrosion exposure, appearance needs, storage time, and thread-fit requirements. DIN 931 partial thread hex bolts can be supplied with common industrial coatings, and XZ Fastener can help buyers compare cost and application suitability before production.
| Finish | Suitable Use | Purchasing Consideration |
|---|---|---|
| Plain | Oiled storage, temporary assembly, or applications requiring later coating | Requires rust prevention during storage and transport. |
| Zinc plated | Indoor machinery, light-duty construction, warehouse stock | Cleaner appearance and thinner coating; buyers purchasing full-thread items may also request zinc plated DIN 933 bolts. |
| أكسيد أسود | Machinery interiors, oiled assemblies, black appearance requirements | Limited corrosion protection unless combined with oil or additional protection; black oxide DIN 933 bolts can be matched for mixed orders. |
| Hot dip galvanized | Outdoor steel structures, guardrails, brackets, solar mounting, exposed assemblies | Thicker zinc layer improves corrosion allowance but requires attention to thread fit and nut matching. Hot dip galvanized DIN 933 bolts may be ordered together for full-thread positions. |
| Dacromet or Geomet | Outdoor equipment and corrosion-sensitive assemblies | Useful when coating uniformity and corrosion performance both matter. |
For broader finish comparison, review the fastener coating guide before confirming zinc plated, black oxide, HDG, or zinc flake requirements.
Manufacturing and Quality Control
DIN 931 partial thread hex bolts are normally produced through wire preparation, heading or forging depending on size, shank control, thread rolling, heat treatment when required, surface finishing, inspection, and packing. Since DIN 931 includes both threaded and unthreaded areas, dimensional control is important for assembly fit.
- Head dimensions, shank diameter, total length, thread length, and chamfer checks
- Go/no-go thread gauge inspection for metric thread fit
- Hardness and tensile testing for Grade 8.8 or higher classes when requested
- Coating coverage, thickness, surface appearance, and thread build-up review
- Size separation, carton weight, pallet label, and batch identification checks
For mixed partial-thread and full-thread purchasing, XZ Fastener can review DIN 931 and DIN 933 Grade 8.8 hex bolts in the same project or distributor stock inquiry.
تطبيقات
Machinery and Equipment Frames
DIN 931 partial thread hex bolts are used in machinery bases, conveyors, industrial frames, agricultural equipment, and general equipment assembly where the shank helps support the clamped parts.
Steel Structures and Brackets
Grade 8.8 carbon steel hex bolts with suitable washers and nuts can be supplied for brackets, fabricated steel structures, support plates, guardrails, and outdoor assemblies.
Maintenance and Replacement Stock
Metric hex head bolts in DIN 931 sizes are practical for MRO stock where equipment drawings call for partial thread bolts rather than full thread substitutes.
Distributor and Project Kits
Importers and distributors can order mixed sizes, matched nuts and washers, carton labels, pallet marks, and related fastener products according to local demand.
How to Get a Faster Quotation
A complete inquiry helps XZ Fastener check material, tooling, finish, packing, and lead time more efficiently. If the bolts are used in a project, include drawings or the relevant standard notes.
- Standard: DIN 931, ISO 4014, or buyer drawing reference
- Size list: diameter x length, such as M8 x 50, M12 x 80, M20 x 120
- Strength class: 4.8, 8.8, 10.9, or other requirement
- Finish: plain, zinc plated, black oxide, hot dip galvanized, Dacromet, Geomet, or other coating
- Quantity: quantity per size and estimated repeat demand if available
- Matching parts: nuts, flat washers, spring washers, hardened washers, or assembled sets
- Packaging: bulk carton, small box, woven bag, pallet, private label, barcode, or project mark
- Inspection requirements: material certificate, dimensional report, hardness, tensile test, coating thickness, salt spray, or third-party inspection
Send your details through the request a quote page or contact XZ Fastener for review of DIN 931 partial thread hex bolts and related metric fasteners.
أسئلة متكررة
What is DIN 931 used for?
DIN 931 is used for partial thread metric hex head bolts. It is commonly selected for machinery, steel structures, brackets, equipment frames, and assemblies where an unthreaded shank is required through part of the clamped joint.
How is DIN 931 different from DIN 933?
DIN 931 is partial thread, while DIN 933 is full thread. DIN 931 is often used when the shank needs to pass through the shear or grip area. DIN 933 full thread hex bolts are used when thread is needed along the full bolt length.
Can DIN 931 partial thread hex bolts be supplied in Grade 8.8?
Yes. Grade 8.8 carbon steel hex bolts are a common option for DIN 931 partial thread bolts. Hardness, tensile testing, and material certificates can be supplied according to order requirement.
Which finishes are available for DIN 931 partial thread bolts?
Common finishes include plain, zinc plated, black oxide, hot dip galvanized, Dacromet, and Geomet. The correct finish depends on corrosion exposure, appearance requirement, storage time, and thread-fit needs.
Can XZ Fastener supply matched nuts and washers?
Yes. DIN 934 nuts, flat washers, spring washers, hardened washers, and assembled bolt-nut-washer sets can be supplied according to order requirement.
What should I provide for an accurate quotation?
Please provide the size list, finish, quantity, packaging method, inspection requirements, matching nut or washer needs, and any project drawings or standards that must be followed.
Send Your DIN 931 Partial Thread Hex Bolt Inquiry
For a faster response, send your size list, finish, quantity, packaging method, and inspection requirements. XZ Fastener can review DIN 931 partial thread hex bolts, Grade 8.8 carbon steel hex bolts, 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 matched nut and washer sets according to your purchasing plan.
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