Inconel 625 Socket Head Cap ScrewASTM F468 · ASME B18.3 · Manufacturer, trader & exporter, India
Alloy 625 · UNS N06625
An Inconel 625 socket head cap screw is a screw with a cylindrical head and hexagon socket. ASTM F468 (N06625) where specified, No. 0 (0.060 in.) – 1.500 in.; otherwise may be machined from ASTM B446 bar (UNS N06625), where applicable — finished requirements to the purchase specification or project drawing. Allen-type cap screws are used where the head must sit flush or space is tight.
- ASTM F468
- ASME B18.3
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an Inconel 625 Socket Head Cap Screw?
- What it is
- A screw with a cylindrical head and hexagon socket
- Finished spec
- ASTM F468 (N06625) where specified, No. 0 (0.060 in.) – 1.500 in.
- Material / feedstock
- ASTM B446 bar (UNS N06625), where applicable
- Dimensions
- ASME B18.3 · ISO 4762 · DIN 912 (legacy DIN)
- Grade
- Inconel 625 · UNS N06625
- Best at
- Seawater, high strength and high temperature in one alloy
Inconel 625 Socket Head Cap Screw Specification
| Product | Inconel 625 Socket Head Cap Screw |
|---|---|
| Finished fastener specification | ASTM F468 (N06625) where specified, No. 0 (0.060 in.) – 1.500 in. |
| Material / feedstock specification | ASTM B446 bar (UNS N06625), where applicable |
| Dimensional standard | ASME B18.3 · ISO 4762 · DIN 912 (legacy DIN) |
| Manufacturing route | To the finished specification where specified; otherwise machining from bar, where applicable |
| Project / purchase specification | Yes — finished fastener requirements are to the purchase specification or project drawing |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Socket Head Cap Screw
Allen-type cap screws are used where the head must sit flush or space is tight.
- Hex socket drive
- ASME B18.3 · DIN 912
- Metric and inch
More on choosing: Socket head cap screw guide.
Inconel 625 Socket Head Cap Screw: Why 625 for socket head cap screws
Allen-type cap screws are used where the head must sit flush or space is tight. In Inconel 625, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Nickel-alloy fasteners match nickel-alloy flanges in corrosive or hot service. Inconel 625 is picked for seawater, high strength and high temperature in one alloy. |
|---|---|
| Typical service | Offshore & subsea — Risers, flowlines and clad pipe. |
| Bolting | B7 (coated), B8M or nickel-alloy studs in Inconel 625 (bar to ASTM B446, where applicable), as the project specifies |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Inconel 625 Socket Head Cap Screw Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Nickel | As specified |
| Chromium | As specified |
| Molybdenum | As specified |
| Niobium + Tantalum | As specified |
| Iron | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM B443 for UNS N06625.
Inconel 625 Socket Head Cap Screw Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM B443 for UNS N06625 — Grade 1 annealed plate.
Full chemistry, properties and equivalents are on the Inconel 625 grade page.
Standards on this page
Other Inconel 625 fasteners
Inconel 625 Socket Head Cap Screw — questions buyers ask
DIN 912 and ISO 4762 — are they the same?
Yes, ISO 4762 replaced DIN 912 with the same main dimensions.
What nut is used with Inconel 625 socket head cap screws?
Usually a nut in the same alloy — it may be machined from ASTM B446 bar, where applicable; finished requirements are to the purchase specification or project drawing.
Which standard covers Inconel 625 socket head cap screws?
Finished fastener specification: ASTM F468 (N06625) where specified, No. 0 (0.060 in.) – 1.500 in.. Material / feedstock: ASTM B446 bar (UNS N06625), where applicable. Dimensions: ASME B18.3 · ISO 4762 · DIN 912 (legacy DIN). State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a Inconel 625 socket head cap screw?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026