AISI 416C Stainless Steel Screws manufactured at TorqBolt are corrosion resistant,low maintainence,silver finish.
Dimensional standards as per ANSI B18.2.1 in imperial and ANSI B18.2.3.1M in metric are provided.
The raw material of these fasteners is classified as Martensitic Stainless Steel. Being a PED certified Fasteners Manufacturer by TUV Rheinland,our fasteners are accompanied with EN 10204 3.1/3.2 certification. AISI 416C Stainless Steel Screws are available in hot forged,cold forged and bar stock machined conditions depending upon the order quantity.
AISI 416c Stainless Steel screws are externally threaded fasteners typically driven into a tapped hole or self-tapped material. TorqBolt manufactures AISI 416c Stainless Steel 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
AISI 416c Stainless Steel 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
AISI 416c Stainless Steel 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 AISI 416c Stainless Steel 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.
Martensitic Stainless Steel (400-series)
Martensitic stainless steels are body-centered tetragonal Fe-Cr alloys (typically 12-17% Cr, >0.1% C) that respond to quench + temper heat treatment, achieving high hardness and tensile strength while retaining moderate corrosion resistance. They are magnetic and used where mechanical strength is critical and corrosion exposure is mild.
AISI 410 (UNS S41000) is the general-purpose grade for valve trim, pump shafts, turbine blades, and high-strength bolting; quench from 950-1010°C + temper at 200-700°C dial in tensile strength from 600 to 1200 MPa. AISI 416 is the free-machining variant (S+P additions). AISI 420 raises C for higher hardness (cutlery, surgical instruments). AISI 431 adds Ni for marine + aerospace fasteners. AISI 440A/B/C are the highest-hardness grades (HRC 56-60) for bearings and ball valves.
Martensitic fasteners are supplied per ASTM A276 / A479 with hardness, tensile, and impact testing per the heat-treat condition. EN 10204 3.1 / 3.2 certs standard. NACE MR0175 service is restricted — martensitic grades are SSC-susceptible above HRC 22 hardness, requiring careful temper-control for sour applications.
