NITRONIC 50 Set Screws manufactured at TorqBolt are corrosion resistant,high temperature resistant with ultimate tensile strength.
Dimensional standards as per DIN 913,DIN 914,DIN 915,DIN 916,DIN 551,DIN 553,DIN 438,BS 4286 are provided.
The raw material of these fasteners is further classified as ALLOY XM-19. Being a PED certified Fasteners Manufacturer by TUV Rheinland,our fasteners are accompanied with EN 10204 3.1/3.2 certification. NITRONIC 50 Set Screws are available in hot forged,cold forged and bar stock machined conditions depending upon the order quantity.
Nitronic 50 Also Known As Xm-19 Is A Chrome Manganese Nickel Based Alloy .alloy 50 Has Double Yield Strength As Compared To Stainless Steel 316/304 With Low Magnetic Permeability. This Alloy Exhibits High Strength At Elevated Temperatures And Sub Zero Temperatures As Well.
Nitronic 50 Set Screws — Specifications & Dimensions
Nitronic 50 Set screws are externally threaded fasteners typically driven into a tapped hole or self-tapped material. TorqBolt manufactures Nitronic 50 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
Nitronic 50 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
Nitronic 50 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 Nitronic 50 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.
Nitronic stainless steels are nitrogen-strengthened austenitic alloys that achieve high yield strength (1.5-2× conventional 304/316) without the heat-treatment required for precipitation-hardening grades. Nitrogen acts as a powerful interstitial solid-solution strengthener while remaining fully austenitic, retaining the corrosion resistance and toughness of standard austenitics.
Nitronic 50 (UNS S20910) is the dominant grade: 22Cr-13Ni-5Mn-2Mo-0.3N giving yield ~380 MPa in the annealed condition (vs ~205 MPa for 316L) and corrosion resistance better than 316L. The standard choice for high-strength corrosion-resistant fasteners in marine + chemical-process service. Nitronic 60 (S21800) trades some corrosion for outstanding galling and wear resistance — the workhorse for valve trim, threaded couplings, and wear-prone bolting where galling would destroy a 304/316 thread. Nitronic 32 / 33 / 40 are low-Ni variants for cost-sensitive applications.
Nitronic fasteners ship per ASTM A276 / A479 with EN 10204 3.1 / 3.2 certification covering nitrogen content (critical for property reproducibility), tensile, hardness, and stress-corrosion testing. NACE MR0175 sour-service is fully qualified in the annealed condition for both Nitronic 50 and 60.
