Tiếng Việt 
English 
Español 
Русский 
العربية DIN 933 Grade 8.8 hex bolts manufacturer
XZ Fastener supplies DIN 933 Grade 8.8 hex bolts for buyers who need full-thread metric bolts with controlled strength, finish, and thread fit. These bolts are commonly ordered for steel structures, machinery, equipment assembly, brackets, frames, and general industrial fastening. Sizes, surface treatment, packaging, and inspection documents can be supplied according to order requirement. For buyers comparing DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, and related metric hex head bolts, XZ Fastener can support standard supply as well as application-based sourcing discussion.
Quick Specs
What Buyers Should Know Before Sourcing DIN 933 Grade 8.8 Hex Bolts
Confirm the standard and thread length
DIN 933 is a full-thread hex head bolt standard and is often compared with DIN 931 partial-thread bolts. If your drawing calls for full engagement through the clamped parts, confirm DIN 933 or ISO 4017 before ordering. Buyers can also review XZ Fastener’s DIN 933 ISO 4017 high tensile hex bolts for related product options.
Match grade, nut, and washer
Grade 8.8 bolts should be matched with suitable nuts and washers for the assembly load and service environment. If the buyer needs a substitute for another metric hex head bolts specification, the thread pitch, coating thickness, and mechanical class should be reviewed before production.
Check finish impact on fit
Coatings such as zinc plating, black oxide, hot dip galvanizing, and zinc flake change corrosion protection and thread behavior. For high-strength bolts, buyers should also consider the hydrogen embrittlement risk in high-strength bolts when selecting an electroplated finish.
Plan inspection requirements early
Dimensional checks, thread gauges, surface thickness, hardness, tensile testing, and third-party inspection should be stated in the inquiry. XZ Fastener can discuss related custom fasteners when a standard DIN 933 bolt does not fully match the drawing.
Common Purchasing Descriptions
Procurement teams may use different descriptions for the same or closely related products. Clear wording helps avoid delays during quotation and production review.
- DIN 933 full thread hex bolts, property class 8.8, metric coarse thread
- Grade 8.8 carbon steel hex bolts, fully threaded, DIN 933 / ISO 4017
- Metric hex head bolts, M6 to M36 sizes, standard or project-specific lengths
- Zinc plated DIN 933 bolts for indoor machinery and general corrosion protection
- Black oxide DIN 933 bolts for oiled assemblies or darker appearance requirements
- Hot dip galvanized DIN 933 bolts for outdoor steelwork, subject to thread allowance review
For wider sourcing, buyers can browse XZ Fastener’s fastener products and compare related bolt, nut, screw, washer, and custom part categories.
Detailed Specifications Table
| Item | Typical Supply Range | Buyer Notes |
|---|---|---|
| Standard | DIN 933, ISO 4017 equivalent discussion available | Confirm whether the drawing requires DIN marking, ISO reference, or both. |
| Size Range | Common metric sizes such as M6-M36, other sizes upon review | Provide diameter, length, pitch, and whether coarse or fine thread is required. |
| Thread Form | Full thread, metric thread | Thread tolerance and coating thickness should be checked for assembled fit. |
| Strength Class | Grade 8.8 / property class 8.8 | Mechanical values should be confirmed according to the governing standard and size. |
| Material | Carbon steel, heat treated and tempered | Material grade can be selected according to mechanical and production requirements. |
| Finish | Plain, zinc plated, yellow zinc, black oxide, hot dip galvanized, zinc flake | Salt spray, thickness, color, and lubricant requirements should be stated when needed. |
| Inspection | Dimension, thread gauge, hardness, surface, packaging check | Mill test report, mechanical report, or third-party inspection can be discussed before order. |
| Packaging | Bulk carton, small box, pallet, or buyer-specified packing | Include label language, carton weight limit, barcode, and pallet requirement if applicable. |
Material and Grade Explanation
Grade 8.8 carbon steel hex bolts are heat-treated fasteners used where higher strength is required than low carbon steel bolts. The 8.8 marking indicates a defined mechanical property class under the applicable bolt standard; final test values depend on diameter, heat treatment, and inspection method. For buyers comparing grades, XZ Fastener’s guide to ISO 898-1 bolt grades provides useful background for property class selection.
DIN 933 Grade 8.8 hex bolts are commonly ordered with compatible nuts and washers. If the assembly is exposed to vibration, dynamic load, outdoor conditions, chemicals, or repeated maintenance, the buyer should confirm the working environment before selecting material, coating, and locking method.
Surface Finish Selection Guide
Zinc Plated
Zinc plated DIN 933 bolts are widely used for machinery, cabinets, brackets, and indoor equipment. Clear zinc and yellow zinc can be supplied according to order requirement. For outdoor exposure, confirm the expected corrosion resistance and maintenance interval.
Black Oxide
Black oxide DIN 933 bolts are often selected for dark appearance, light corrosion protection with oil, and controlled assemblies where heavy coating buildup is not desired. It is not a substitute for heavy outdoor corrosion protection.
Hot Dip Galvanized
Hot dip galvanized DIN 933 bolts can be considered for outdoor steelwork. Because HDG coating is thicker than electroplating, thread fit and mating nuts should be reviewed. Buyers can compare options in the zinc plated vs hot dip galvanized bolts guide.
Zinc Flake and Dacromet-Type Coatings
Zinc flake coatings are often requested when corrosion protection is needed without electroplating. They can be discussed for Grade 8.8 bolts when the buyer specifies coating system, thickness, color, and performance requirement.
Manufacturing and Quality Control
Production normally starts with order review, material selection, heading, thread rolling, heat treatment, surface treatment, and final inspection. Important checkpoints include across-flats dimension, head height, under-head bearing surface, thread pitch, overall length, chamfer, surface appearance, hardness, and thread engagement.
For threaded fasteners, gauge control is a practical way to reduce assembly problems. Buyers who need tighter thread assurance can reference Go/No-Go thread gauge testing and state the inspection level in the inquiry. Packaging inspection can also include carton strength, label details, pallet condition, and mixed-size separation.
Applications
- Steel structures, brackets, frames, and support systems
- Machinery manufacturing, equipment assembly, and maintenance repair
- Industrial cabinets, conveyors, lifting fixtures, and production lines
- Automotive aftermarket components and general engineering assemblies
- Outdoor installations when a suitable corrosion-resistant finish is specified
How to Get a Faster Quotation
To reduce back-and-forth, send a clear size list with diameter, length, thread pitch, quantity, finish, grade, packaging method, destination, and inspection requirements. If you have drawings, photos, or previous purchase descriptions, include them with the inquiry. Buyers can request a quote or contact XZ Fastener for DIN 933 Grade 8.8 hex bolts and related metric fasteners.
FAQ
Can DIN 933 Grade 8.8 hex bolts be supplied in full thread?
Yes. DIN 933 is a full-thread hex head bolt standard. Buyers should provide the metric size, length, pitch, grade, finish, and quantity so the quotation can be checked accurately.
What is the difference between DIN 933 and DIN 931?
DIN 933 bolts are fully threaded, while DIN 931 bolts are partially threaded. The correct choice depends on grip length, thread engagement, and the assembly drawing.
Which finish is suitable for Grade 8.8 carbon steel hex bolts?
Zinc plating, yellow zinc, black oxide, hot dip galvanizing, and zinc flake coatings can be considered. The suitable finish depends on corrosion exposure, appearance, thread fit, and inspection requirement.
Do zinc plated Grade 8.8 bolts need hydrogen embrittlement control?
For high-strength electroplated bolts, hydrogen embrittlement risk should be discussed before production. Baking, process control, and alternative coatings may be considered according to the application.
Can XZ Fastener supply matching nuts and washers?
Matching nuts and washers can be discussed according to order requirement. Buyers should provide the bolt grade, finish, standard, and assembly condition so compatibility can be reviewed.
What documents should be requested for a DIN 933 bolt order?
Common documents include dimensional inspection records, material report, hardness or mechanical test report, coating inspection, packing list, and third-party inspection report when required by the buyer.
Send Your DIN 933 Grade 8.8 Hex Bolt Inquiry
For a faster response, send your size list, finish, quantity, packaging method, and inspection requirements. XZ Fastener can review standard DIN 933 Grade 8.8 hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, hot dip galvanized DIN 933 bolts, and related metric hex head bolts according to your order requirement.
Request a quote or contact XZ Fastener with your drawing, purchase list, or project specification.