Socket head cap bolts
Standards: DIN 912:1983; ISO 4762 available by specified edition
Socket head cap bolts have a cylindrical head with an internal hexagon drive.
Specifications & details →Bolts & Threaded Rods Supplier
Product series, materials and dimensional information.
Bolts connect components through a defined head, shank and threaded section. Choose the head and body geometry before specifying the material, finish and dimensions. SPM’s catalog includes hex, socket, carriage, flange, structural and formed bolts, along with fully threaded rods.
For an inquiry, provide the diameter and pitch, under-head or overall length, thread length and required standard. Customized geometry and titanium or nickel alloy requirements can be reviewed against a drawing.
10 series
Carriage Bolts
Standards: DIN 603:2017
Carriage bolts use a domed head and a square neck beneath it.
Specifications & details →
Eye bolts · DIN 444
Standards: DIN 444:2017
DIN 444 eye bolts have an eye-shaped end and a threaded shank.
Specifications & details →
DIN 931 partially threaded hex bolts
Standards: DIN 931-1:1987; ISO 4014:2022
Partially threaded hex bolts combine an external hexagon head, an unthreaded shank section and a threaded end.
Specifications & details →
DIN 933 fully threaded hex bolts
Standards: DIN 933:1987; ISO 4017:2022
Fully threaded hex bolts have an external hexagon head and thread extending along the body toward the head.
Specifications & details →
Hex flange bolts · DIN 6921
Standards: DIN 6921:1983
DIN 6921 hex flange bolts have a hexagonal drive head and an integrated flange.
Specifications & details →
Hex flange bolts · DIN 6922
Standards: DIN 6922:1983
Hexagon flange bolts with a reduced-diameter shank. See edition-specific dimensions and quotation requirements.
Specifications & details →
Structural Bolts
Standards: DIN 6914:1989
Structural bolts are ordered as part of a specified structural fastening arrangement.
Specifications & details →
Fully threaded rods
Standards: DIN 976-1:2016
The existing DIN 975 catalog entry describes fully threaded rods.
Specifications & details →
U Bolts
Standards: DIN 3570:1968
U bolts have a formed U-shaped body with threaded ends.
Specifications & details →No matching series. Contact us to describe the part you need.
Need a different specification?
Choose Customized and share your drawing or requirements.
Choose your bolt standard
Start with the required head form and thread configuration, then confirm the standard, material and dimensions. For an existing assembly, include the drawing or the complete part specification.
| Series | Configuration | Key ordering detail |
|---|---|---|
| DIN 931 hex bolts | Partial thread | Under-head length and thread length / grip |
| DIN 933 hex bolts | Full thread | Pitch, length and required head dimensions |
| DIN 912 socket head cap bolts | Internal hex drive | Head clearance and tool access |
| DIN 603 carriage bolts | Round head, square neck | Neck dimensions and mating hole |
| DIN 6921 flange bolts | Hex head with flange | Flange geometry and specified bearing face |
| Threaded rods — DIN 976-1 reference | Threaded length without a head | Length, pitch and end requirements |
Need a non-standard bolt? Send a drawing with its revision, critical dimensions, material and quantity.
How to select bolts
| Head & tool access | Thread & grip length | Material & properties | Assembly specification |
|---|---|---|---|
| Check whether an external hex or internal socket fits the available access. | Distinguish full thread, partial thread, double-end studs and fully threaded rods. | Identify the exact grade, property class and corrosion requirements. | For structural or other specified systems, confirm matching nuts and washers. |
Materials and international specifications
SPM reviews carbon steel, alloy steel, stainless steel and non-ferrous material requirements, including titanium and nickel alloys. Exact grade and availability depend on the product and quotation.
| Material family | Information to include |
|---|---|
| Carbon / alloy steel | Exact grade, property class or hardness, heat-treatment and finish requirements. |
| Stainless steel | Grade, service environment, thread and surface-treatment requirements. |
| Titanium / nickel alloys | Exact alloy grade, drawing, critical tolerances and required inspection documents. |
| Aluminum | Exact grade, dimensions, finish and application requirements. |
Send the exact DIN / ISO, ASME, ASTM, API, SAE or JIS standard number and edition. These standards cover different product, material and testing requirements; naming a standard family alone is not a complete specification.
Dimensions and size selection
| Product series | Catalog diameter range | Dimensions to specify |
|---|---|---|
| Socket head cap bolts | M3 - M64 | Pitch, length, thread length and head / shank dimensions |
| Carriage Bolts | M5 - M24 | Pitch, length, thread length and head / shank dimensions |
| Eye bolts · DIN 444 | M6 - M30 | Pitch, length, thread length and head / shank dimensions |
| Partially threaded hex bolts | M5 - M64 | Pitch, length, thread length and head / shank dimensions |
| Fully threaded hex bolts | M6 - M48 | Pitch, length, thread length and head / shank dimensions |
| Hex flange bolts · DIN 6921 | M5 - M24 | Pitch, length, thread length and head / shank dimensions |
| Hex flange bolts · DIN 6922 | M6 - M24 | Pitch, length, thread length and head / shank dimensions |
| Structural Bolts | M12 - M36 | Pitch, length, thread length and head / shank dimensions |
| Fully threaded rods | M6 - M64 | Pitch, length, thread length and head / shank dimensions |
| U Bolts | M6 - M30 | Pitch, length, thread length and head / shank dimensions |
Catalog ranges are initial references. Confirm the required dimensions, tolerances, material and applicable standard before ordering. Ranges do not imply that every listed material is available in every size.
Common questions
Can SPM quote customized bolts?
Yes. Select Customized and share the drawing, material grade, critical dimensions, quantity and required documents. The quotation confirms the agreed scope.
What if my size or product is not shown?
Choose Customized and provide a drawing, part number or clear description. Include the mating parts and application where they affect the selection.
Are the listed DIN and ISO references always interchangeable?
No. Compare the exact standard editions, dimensions, material requirements and product scope. The original catalog references are starting points for the inquiry.
Prepare a complete bolt inquiry
List the standard and edition, diameter, pitch, length, thread length where applicable, material / property class, finish and quantity for each item. Include matching nuts and washers if required.
For delivery to the UAE, Yemen or another destination, state the destination country and port, packing requirements and requested date. Shipment arrangements, documentation, MOQ and lead time are confirmed for the specific quotation.
Request a quotation
Leave your contact details and select a product category. We can discuss specifications and drawings by email.
Contact
Seith Lee · +86 15821980914
A brief note is enough to get started.