DIN 931/933 Grade 8.8 Black Oxide Hex Bolts

Grade 8.8 Hex Bolts for Bulk Orders

Source grade 8.8 hex bolts in black oxide carbon steel for machinery assembly, equipment maintenance and industrial fastening. Choose DIN 931 for a partially threaded bolt with a smooth shank, or DIN 933 for a fully threaded bolt. Send XZ Fastener your required sizes and quantities for a quotation.

Ordering Information

Please confirm the required size combinations, packaging details and delivery destination when requesting a quote. The quotation will specify the lead-time start date and shipping schedule; transit time depends on the destination and shipping method.

Request a bulk quote for DIN 931/933 hex bolts

Product Specifications

Size reference: The dimensions above are common metric references, not a stock availability list or a promise that every diameter and length combination is available. Exact sizes, thread pitch and availability will be confirmed in the quotation. For a hex bolt, length is measured from beneath the head to the end of the bolt.

DIN 931 or DIN 933: Which Thread Design Do You Need?

DIN 931 partially threaded bolts have an unthreaded shank and a threaded end. Include the required bolt length and grip arrangement in your enquiry so the shank and threaded section can be checked against your assembly.

DIN 933 fully threaded bolts have thread extending along the body towards the head. Specify the diameter, length and thread pitch to match the mating nut or tapped hole.

If your drawing specifies ISO 4014 or ISO 4017, include that standard in your enquiry. DIN and ISO dimensions should be checked before substitution.

Material, Finish and Assembly Notes

These bolts use carbon steel in property class 8.8. The black oxide finish gives a uniform black appearance and basic surface protection. Keep the fasteners dry and appropriately protected during storage. For exposed or corrosive environments, tell us the service conditions so the finish requirements can be reviewed.

Typical uses include machine frames, equipment installation, brackets and general industrial assemblies. Select the bolt size, mating components and tightening procedure to suit the application. Use a matching hex wrench or socket and the torque specified for your assembly.

Need matching components? See our DIN 934 hex nut guide, or browse other bolt types.

How to Request a Quotation

To help us quote the correct product, please include:

• Standard: DIN 931 or DIN 933
• Thread diameter × bolt length, thread pitch and any drawing requirements
• Quantity required for each size
• Property class 8.8 and black oxide finish
• Custom packaging requirements
• Delivery country, destination and required schedule

Ordering FAQ

What is the minimum order quantity?

The minimum order quantity is 1,000 pieces. Include the quantity for each required size in your enquiry.

What is the lead time?

The lead time is 3 days. Confirm the start date, shipment schedule and transport time in the quotation for your order.

Can the packaging be customized?

Yes. Send your packaging requirements with the enquiry so they can be included in the quotation.

Are all listed sizes available?

The listed diameters and lengths are common size references. Availability of your specific diameter, length and thread combination will be confirmed when we quote.

Send your sizes and quantities to XZ Fastener