UN Wire Thread Insert 1/4-28 304 Stainless Steel

UN Wire Thread Insert 1/4-28 304 Stainless 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.

Specifications

Ordering & shipping

Need a specific size, grade or standard? Send us a quote request — we quote to drawing and to DIN / ANSI / GB / JIS standards.

About this thread insert

This is a thread insert in 304 Stainless Steel, at strength class A2-70, supplied plain, with an 1/4-28 thread. 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 thread insert repairs a stripped thread or reinforces a thread in a softer parent material, so a steel fastener can be used again and again in aluminium, plastic or castings. Used on castings, moulds, aluminium housings and any assembly that is dismantled often enough for the original thread to wear out.

304 (EN 1.4301, A2) is the general-purpose austenitic stainless grade: good resistance to fresh water, food acids and atmospheric corrosion, non-magnetic in the annealed state. It is the default for indoor and general outdoor fastening where chlorides are low.

Plain (self-colour) means no coating. On 304 and 316 stainless that is fine — the alloy passivates on its own. On carbon steel it will rust, so choose a coated option instead.

This line ships worldwide from our own warehouse. Express courier, air parcel and postal services are all offered at checkout, with a tracking number e-mailed as soon as the parcel is handed over.