UN Countersunk Socket Screw 10# 10B21 Carbon Steel

UN Countersunk Socket Screw 10# 10B21 Carbon Steel — stocked and shipped worldwide by SFX Fasteners. Available for single-piece retail orders — no minimum order — dispatched from our own warehouse within 24–48 hours.

Technische Daten

Bestellung & Versand

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Über diese Schraube

This is a screw in 10B21 Carbon Steel, at strength class Grade 10.9, supplied black oxide, with an 10# thread and a 5/8 in length. Every dimension is stated against the standard named above; where a tolerance class matters to your design, ask us and we will confirm it in writing before you order.

A screw threads directly into the parent material or into a nut, so the thread form, the point and the drive decide what it can be used for. Commonly used on machinery, tooling, appliances, electrical enclosures, furniture and automotive assemblies where the head has to sit low or be driven from one side only.

Grade 10.9 is alloy steel at 1000 MPa tensile / 900 MPa yield, typically supplied black oxide or Dacromet. Avoid electroplated zinc on 10.9 — acid pickling risks hydrogen embrittlement.

Black oxide is a conversion coating about 1–2 µm thick, usually oiled. It adds mild corrosion resistance and keeps dimensions exact, which matters on 10.9 and 12.9 parts — there is no hydrogen embrittlement risk.

Diese Position wird von unserem eigenen Lager weltweit versandt. Express-Kurier, Luftpaket und Postversand stehen an der Kasse zur Wahl; die Sendungsnummer erhalten Sie per E-Mail, sobald das Paket übergeben wurde.