DIN 427 Slotted headless screws with flat point
DIN 427 is a slotted headless screw that differs from the ordinary set screw in one important way: it is only partly threaded. A defined length of thread sits at the point end, and the rest of the shank is a plain cylindrical body ending in a flat, chamfered point. That plain shank lets DIN 427 act as a short pivot, spindle or bearing journal that also threads into place. Definite Metal manufactures DIN 427 in CW614N brass from M3 to M10, with lengths to 45 mm and custom dimensions on request. Part of our brass grub screws range.
What the Part-Threaded Body Does
Because only the tip is threaded, the plain shank can turn inside a bore, carry a lever, or serve as a locating spindle while the threaded nose anchors the screw. The flat chamfered point seats squarely without biting, so it clamps or locates gently against the mating surface. This makes DIN 427 useful where a small, headless, adjustable pin is needed rather than a full-length locking screw. When you want full thread engagement for maximum grip, use the fully-threaded DIN 551 flat point instead; for a locking bite, see the DIN 438 cup point.
Why Brass
Brass DIN 427 is chosen for light pivots and adjustable spindles in instruments, valves, electrical gear and decorative fittings, where the plain shank benefits from brass’s smooth bearing behaviour and corrosion resistance, and where non-magnetic material is required. CW614N turns a clean plain shank with a concentric thread and crisp slot. Steel or stainless versions are available where higher strength or a harder journal is needed.
DIN 427 Dimensions (mm)
| Thread d | Pitch P | Thread length b (min) | Slot width n | Slot depth t (min–max) | Length l range |
|---|---|---|---|---|---|
| M3 | 0.5 | 3.6 | 0.4 | 0.8–1.05 | 6–30 |
| M4 | 0.7 | 4.8 | 0.6 | 1.12–1.42 | 8–40 |
| M5 | 0.8 | 6.0 | 0.8 | 1.28–1.63 | 8–40 |
| M6 | 1.0 | 7.2 | 1.0 | 1.6–2.0 | 12–40 |
| M8 | 1.25 | 9.6 | 1.2 | 2.0–2.5 | 16–45 |
| M10 | 1.5 | 12.0 | 1.6 | 2.4–3.0 | 20–40 |
The point is a flat, chamfered end; the shank between thread and point is plain (unthreaded). Other sizes to order.
DIN 427 corresponds to ISO 2342 (slotted headless screw with flat/chamfered end). Also cross-referenced as PN 82271.
Materials — Brass Grades
| Grade | Standard | Character | Typical composition |
|---|---|---|---|
| CW614N | EN 12164 | Free-machining brass (standard) | ~58% Cu, ~3% Pb, bal. Zn |
| CW617N | EN 12165 | Hot-forging brass | ~58% Cu, ~2% Pb, bal. Zn |
| IS 319 | IS 319 | Free-cutting brass (Indian) | ~57–59% Cu, Pb, bal. Zn |
| MS / SS 303/304/316 | — | On request | Mild steel or stainless |
Also available in MS and SS 303/304/316 on request.
Finish Options
Natural brass as standard; on request nickel plating, tin plating, or bright dip / passivation. Steel and stainless variants can be supplied plain, zinc plated, or black oxide.
Manufacturing & Export Capability
Custom manufacturing from drawing/sample · MOQ: 500 pcs (typical) · Lead time 1–2 weeks · ISO 9001:2015 · Export packing · FOB Mundra / CIF worldwide · Brass specialist in Jamnagar, India’s brass city
18+ years of manufacturing experience · 19 skilled workers · Sales@definitemetal.com
Applications & Industries
DIN 427 brass slotted headless screws are used as small headless spindles and pivots, adjustable stops with a plain guiding shank, instrument and valve adjusters, and light electrical and decorative mechanisms needing a non-magnetic, corrosion-free part-threaded pin.
Frequently Asked Questions
It is only partly threaded. The thread is at the point end and the rest of the shank is plain, so the screw can act as a short headless spindle or pivot as well as a fastener.
It can rotate inside a bore, guide a lever, or serve as a locating pin while the threaded nose holds the screw in place — useful for small adjusters and pivots.
A flat, chamfered end that seats squarely against the mating surface without biting in.
ISO 2342, the slotted headless screw with flat or chamfered end.
M3 to M10 with lengths up to 45 mm, and custom lengths and thread lengths to your drawing. Typical MOQ is 500 pcs per size.