Titanium Button Head Socket Screws (ISO 7380 / DIN 7380)

Titanium button head socket screws combine a rounded low-profile head with a hexagon socket (Allen) drive. This head sits slightly above the mating surface — much lower than socket head cap screws but not flush like countersunk screws — and requires no countersink in the mating part. Button head screws occupy a middle ground in the Allen-driven screw family: less protrusion than socket head cap screws, but higher strength than countersunk screws. They are the compromise option when you do not want a countersink but need more clearance than a socket head cap screw allows.

Commonly referenced to ISO 7380 (with DIN 7380 as the German standard and ANSI B18.3.3M for inch sizes). Feinuotai supplies in Grade 2 CP titanium and Grade 5 Ti-6Al-4V alloy. Metric M2.5–M20 coordinated.

Product Range & Specifications

ISO 7380 / DIN 7380 commonly referenced.

Head Type

Rounded low-profile button head. Sits slightly above surface. No countersink needed. Head height much lower than socket head cap of same diameter.

Drive Type

Hexagon socket (Allen). Drive size smaller than socket head cap screws of same diameter due to reduced head height.

Thread Forms

Metric coarse & fine pitch. Fully threaded. Inch UNC / UNF on request.

Metric Dimensions

Standard Range: M2.5–M20 (ISO 7380). Lengths per standard series.
Custom Supply: Non-standard diameters, cut-to-length, custom head dimensions.
Stock Availability: M3–M12 common lengths in Gr2 & Gr5.

Grade Options

Regular: Grade 2 (CP Ti) & Grade 5 (Ti-6Al-4V alloy).
Coordinated: Grade 1, Grade 7, Grade 9, Grade 23 — subject to order quantity.
Note: Button head strength lies between socket head cap (strongest Allen drive) and countersunk (weakest). Specify load requirements — we will advise.

Standard References

ISO 7380 (international), DIN 7380 (German), ANSI B18.3.3M (inch).

Custom Manufacturing

Non-standard head profiles, special thread pitches, coatings and finish requirements coordinated per drawing.

Packaging

Bag / box / wooden case per request. Bulk, small-lot and export packaging supported.

Typical Application Areas

Aerospace Interior

Low-profile fasteners for cabin interiors, seat frames & panel clips.

Medical Devices

Smooth rounded heads suitable for patient-contact housings.

Industrial Design

Aesthetic rounded head appearance with Allen drive convenience.

Sporting Goods

Bicycle, motorcycle & outdoor equipment light-duty assembly.

Quality & Documentation

Material test certificates, dimensional verification (head diameter, head height, drive size, thread, length) and surface finish documentation available per order.

Frequently Asked Questions

Socket head cap vs button head vs countersunk — which Allen drive head type?

Socket head cap (DIN 912): Tall cylindrical head, highest strength, head protrudes — requires sufficient clearance above the surface.
Button head (ISO 7380): Low rounded head, intermediate strength, slightly protruding — no countersink needed, fits where clearance is limited but flush surface is not required.
Countersunk (DIN 7991): Flush head, lowest strength, requires 90° countersink — when surface protrusion must be zero.
Choose based on clearance, strength and surface finish requirements.

Can button head screws use the same Allen bit as socket head cap screws?

For the same screw diameter, both use Allen (hex) drive, but the drive size in button head screws is usually smaller than in socket head cap screws of the same diameter (due to reduced head height). Always check the drive size specification — a button head M6 may use a 3 mm Allen bit while a socket head cap M6 uses a 4 mm Allen bit.

Is the button head really lower profile than the socket head cap?

Yes — for the same nominal diameter, the button head height is approximately 40–50% of the socket head cap height. Consult ISO 7380 vs DIN 912 dimensions or tell us your clearance requirement and we will recommend.