A286 Stainless Steel Set Screws manufactured at TorqBolt are high temperature and high strength iron based with high oxidation resistance.
Dimensional standards as per DIN 913,DIN 914,DIN 915,DIN 916,DIN 551,DIN 553,DIN 438,BS 4237 are provided.
The raw material of these fasteners is classified as High temperature Austenitic Stainless Steel. Being a PED certified Fasteners Manufacturer by TUV Rheinland,our fasteners are accompanied with EN 10204 3.1/3.2 certification. A286 Stainless Steel Set Screws are available in hot forged,cold forged and bar stock machined conditions depending upon the order quantity.
A286 stainless steel Fasteners are referred as high temperature bolting with co-efficient expansion similar to Austenitic Stainless Steel. A286 material specification is achieved by producing A286 steel in Argon oxygen decarburization (AOD) or vacuum Induction Melting Process that is further refined by Vacuum Arc Refining (VAR) or Electro Slag Refining (ESR) used for high nickel alloys like incoloy alloys. Comparable to incoloy, A286 can be age hardened with both oil quench and liquid quench conditions. Unlike other precipitation hardening steels, this A286 Steel requires Stress Rupture Testing with 100 hours minimum time to rupture. High temperature and low stress applications, good corrosion resistance at high temperatures are some of the most A286 Stainless Steel Properties. A286 steel is available in both solution treated condition and age hardened conditions.
A286 Stainless Steel Set Screws — Specifications & Dimensions
A286 Stainless Steel Set screws are externally threaded fasteners typically driven into a tapped hole or self-tapped material. TorqBolt manufactures A286 Stainless Steel Set screws per ASME B18.3 (socket products), ASME B18.6.3 (machine screws), DIN 912 / 7991 / 6912, and ISO 4762 / 10642, in metric M3–M48 and imperial 0–1/2".
Drive Types
Hex socket (Allen) — ASME B18.3 / DIN 912, primary for high-torque industrial use
A286 Stainless Steel Set screws are available in cap (cylindrical), button (low-profile dome), countersunk / flat (82° or 90°), pan, fillister, truss, and shoulder configurations. Countersunk per DIN 7991 with 90° head angle is standard for metric; 82° per ASME B18.6.3 for imperial.
Thread & Length
A286 Stainless Steel Set screws use full-thread or partial-thread (length-under-head) configurations. Machine screws are typically full-thread; cap screws use partial thread for grip control. Threading per ASME B1.1 (UNC/UNF) or ISO 965 (metric coarse/fine), Class 2A or 6g default. Length-under-head is measured from the bearing surface for hex/cap, from the largest face for countersunk. Custom lengths quoted to drawing.
Specialty Screws
TorqBolt produces A286 Stainless Steel Set set screws (cup-point, cone-point, dog-point, flat-point, hex-socket DIN 913/914/915/916), shoulder screws (precision-ground shoulder for pivot applications), and self-tapping screws (Type AB, Type 25). All certified per EN 10204 3.1 / 3.2 with optional NACE MR0175 sour-service compliance.
A286 — Iron-Nickel-Chromium Superalloy
A-286 (UNS S66286, AISI 660) is an iron-nickel-chromium age-hardenable superalloy positioned between austenitic stainless steels and Inconel for high-temperature bolting at 700-1300°F (370-700°C). Approximately 26% Ni + 15% Cr + 1.25% Mo with Ti-Al precipitation hardening, A-286 retains tensile strength and oxidation resistance well beyond the limits of standard 316 SS while being substantially more economical than full nickel superalloys.
A-286 is the standard high-temperature stud and bolt material for steam turbines, gas-turbine combustor cases, exhaust systems, jet-engine shafts, and superheater bolting. The alloy responds to a two-step heat treatment: solution anneal at 980°C (water quench) followed by ageing at 720°C for ~16 hours, yielding tensile ~895 MPa and yield ~585 MPa with elongation >15%.
A-286 fasteners are supplied per ASTM A453 grade 660 (with class A/B/C/D heat-treat conditions) and AMS 5731 / 5732 / 5734 / 5737. EN 10204 3.1 / 3.2 certification covers chemistry, mechanicals at room temperature + elevated test temperatures, hardness (HRC 24-35), and stress-rupture testing. NACE MR0175 / ISO 15156 sour-service compliance is achievable in specific heat-treat conditions; A-286 is widely qualified for downhole + wellhead bolting.
