Stud with medium metal end - fine pitch
Stud with separate tapped-hole and nut ends. Select diameter, projection length and pitches; specify material and supply requirements.
UNI 5912
- Reference
- UNI 5912
- Stud end
- medium
- Thread
- fine pitch
- Units
- mm
Representative stud-family photograph. Geometry and pitches are defined by the table and drawing.
Technical drawing — reading the dimensions
The fixed dimension is bm, not L. For UNI 5912 in M10, nominal stud-end length bm is 15 mm. L is measured from the end of the stud-end thread to the nut end; nominal overall length is L + bm.
- bm
- End screwed into the component. FIXED nominal length for the standard and diameter: last table column (js16).
- L
- Length EXCLUDING STUD END, to specify in the enquiry. bm is excluded.
- b
- Nut-end thread length. Verify for the requested L and execution; it is not bm.
- d / ds
- d: nominal thread diameter. ds: plain-shank diameter (h13).
- P
- Thread pitch. Read P nut end and P stud end separately.
Reading diagram, not to scale. bm is the geometric stud-end length: it does not by itself specify hole depth or actual engagement. Verify run-outs, chamfers, thread tolerances and usable b on the supply drawing.
Reference geometry
Read the table by selecting d and finding bm in the last column. For a given standard and diameter, bm is the fixed nominal stud-end length, subject to js16 tolerance. It does not change with the requested L.
| d | P nut end | P stud end | ds h13 | bm js16 — fixed stud end |
|---|---|---|---|---|
| M10 | 1,25 | 1,25 | 10 | 15 |
| M12 | 1,25 | 1,25 | 12 | 18 |
| M14 | 1,50 | 1,50 | 14 | 20 |
| M16 | 1,50 | 1,50 | 16 | 22 |
| M18 | 1,50 | 1,50 | 18 | 25 |
| M20 | 1,50 | 1,50 | 20 | 28 |
| M22 | 1,50 | 1,50 | 22 | 30 |
| M24 | 2,00 | 2,00 | 24 | 32 |
P denotes thread pitch, not thread length. ds is the plain-shank diameter with h13 tolerance. Commercial lengths are not listed: specify L excluding the stud end in the enquiry.
Materials, grades, finishes and treatments
| Material | Grade | Finish |
|---|---|---|
| Steel | 8.8 | Oiled; blackened and oiled; zinc plated |
| Stainless steel AISI 303 | To specify | To specify |
Executions to specification
The reference catalogue also lists quenched and tempered PR 80, property classes 10.9 and 12.9, grades B7, B7M, L7, L7M and stainless steels AISI 410 and AISI 316. Material specification, class, treatment and testing requirements must be confirmed for each execution.
AISI 303 does not automatically imply an ISO 3506 property class. Dueemme confirms size, material and finish combinations and availability in its quotation.
Documentation
Download Dueemme data sheet ↓| Document | Status |
|---|---|
| Declaration of conformity | Subject to order agreement |
| Material certificate | Subject to order agreement |
| EN 10204 2.2 test report | Subject to order agreement |
| EN 10204 3.1 inspection certificate | Subject to order agreement |
| Dimensional inspection report | Subject to order agreement |
| Coating report | Subject to order agreement |
| Other documentation | Subject to order agreement |
Batch documents are not automatically included: specify your requirements in the RFQ.
Standards, types and application
UNI 5912
The stud end screws into the component; the opposite end receives the nut. Engagement length depends on the component material and joint design.
Reference DIN 939 identifies an alternative execution to specify, not automatic equivalence with UNI 5912. Verify stud-end thread tolerance, pitches, bm length and run-outs in particular.
For Oil & Gas or pressure equipment, specify the applicable material standard and grade, temperature, service conditions and required documentation. A material designation alone does not qualify the joint.
Configure your enquiry
Specify standard, diameter d and length L EXCLUDING THE STUD END. bm is defined by the table for the standard and diameter. Specify both thread pitches, material, finish and quantity. If providing overall length, explicitly state “overall”.
The size you need, including custom specifications
Other diameters, lengths, materials and finishes can be assessed on request. For dedicated production, we agree geometry, requirements and minimum quantities with the customer.
Send your specification →