What material grade does AISI 416C Stainless Steel Fasteners use?

AISI 416C Stainless Steel Fasteners are manufactured per the applicable ASTM, ASME, DIN, or ISO specification for the material grade. TorqBolt provides material test certificates (MTC) per EN 10204 3.1 or 3.2 with every supply.

What sizes are available for AISI 416C Stainless Steel Fasteners?

TorqBolt manufactures AISI 416C Stainless Steel Fasteners in metric sizes M6 to M100 and imperial sizes 1/4" to 4" diameter, with custom lengths from 10mm to 3000mm. Non-standard sizes are available on request.

Are AISI 416C Stainless Steel Fasteners NACE MR0175 / ISO 15156 certified?

Yes, AISI 416C Stainless Steel Fasteners can be supplied with NACE MR0175 / ISO 15156-2/3 sour service certification when specified at order. Material certificates and test reports are provided.

What is the typical delivery time for AISI 416C Stainless Steel Fasteners?

Standard stock items ship in 1-2 weeks. Custom manufactured AISI 416C Stainless Steel Fasteners typically ship in 4-6 weeks depending on quantity, material availability, and certification requirements.

Do you provide third-party inspection for AISI 416C Stainless Steel Fasteners?

Yes, third-party inspection by TUV, Lloyd's Register, BV, DNV, SGS, and Intertek is available upon request for AISI 416C Stainless Steel Fasteners. Witness testing and stage inspections can be arranged.

AISI 416C Stainless Steel Fasteners Supplier

AISI 416C Stainless Steel Fasteners Specification

AISI 416C Stainless Steel Fasteners like Heavy Hex Bolts Screws Nuts Washers

AISI 416C Stainless Steel Fasteners Properties

Equivalent Designation
ASTM/ASME	AISI	UNS	British Standard	Werkstoff No.	En Name	Swedish(SS)	JIS(SUS)
–	416C	–	–			–	SUS 416C

TorqBolt manufactures AISI 416c Stainless Steel Fasteners via cold forging, hot forging and CNC machining. Sizes range from M1.0 to M100 (metric) and 1/16" to 4" (imperial). Available in coarse, fine, UNC, UNF, UN, BSW and acme threads with half, full or double-end thread configurations. Each AISI 416c Stainless Steel Fasteners batch is supplied with EN 10204 3.1 or 3.2 material test certificates.

Hexagon Bolts

ANSI B18.2.1
ANSI B18.2.3.1M
DIN 931
DIN 933
BS 1768
UNI 5731
UNI 5737
UNI 5739
ISO 4014
ISO 4017
BS 1769
BS 3692

Socket/Slotted Set Screws

DIN 913
DIN 914
DIN 915
DIN 916
DIN 551
DIN 553
DIN 438
BS 4168

Socket/Slotted Countersunk Screws

DIN 963
DIN 7991
BS 4168
BS 1981
BS 483
BS 2470

Socket Cap Screws

ANSI B18.3
B18.3.1M
DIN 912
DIN 6912
DIN 7984
ANSI B18.3
ISO 4762
UNI 5931
BS 2470
BS 4168

Stud Bolts

ASME B18.2.1
DIN 976
DIN 938
DIN 939
DIN 2510
BS 4439
BS 2693
BS4882

Nuts

ANSI B18.2.2
ANSI B18.2.4.6M
DIN 934
DIN 936
BS 1768
BS 1769
BS 1083
BS 3692
ISO 4032
ISO 4033
ISO 4035
UNI 5587
UNI 5588
UNI 5589

Washers

ASME B18.22.1
ASTM F436
ISO 7089
DIN 125
DIN 9021
BS 4320
BS 3410
DIN 127
BS 4464
BS 1802
UNI 6952

Surface Treatments & Coatings

Electro Less Nickel Plating Electro Cadmium Plating Dacromet 320 500 Coating Pickled Passivated Fasteners Silver Plating Nickel Plating Electro Zinc Cobalt Plating Electro Zinc Nickel Plating Ptfe Fluorocarbon Coating Aluminizing Ceramic Filled Fluorocarbon Coating

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AISI 416c Stainless Steel Fasteners — Material Overview & Form Factors

AISI 416c Stainless Steel is a high-performance alloy used wherever standard fasteners cannot meet the corrosion, temperature, or strength envelope. TorqBolt manufactures the full AISI 416c Stainless Steel fastener range — bolts, nuts, screws, washers, studs, and custom forgings — under one ISO 9001:2015 quality system, with PED 2014/68/EU module-H qualification for pressure-equipment service.

Where AISI 416c Stainless Steel Excels

AISI 416c Stainless Steel is specified in oil & gas wellhead components, refinery heat exchangers, petrochemical reactors, power-generation turbines, marine offshore platforms, and pharmaceutical / food-grade processing. Its corrosion resistance, high-temperature strength, and weldability make it the default for service conditions outside the carbon and standard-stainless envelope.

Form Factors Available

Bolts — hex, heavy hex, socket, button, countersunk; M6–M100 / 1/4"–4"

Nuts — standard, heavy, jam, locking variants (nyloc, all-metal, flange)

Screws — cap, machine, set, shoulder, self-tapping; all common drive types

Washers — plain, spring, lock, Belleville, fender, tab

Studs & threaded rod — ASTM A193 / A320 / A453 / A540

Custom forgings — rings, blanks, shaped components to drawing

Standards & Certification

AISI 416c Stainless Steel fasteners are supplied with EN 10204 3.1 (mill cert) or 3.2 (third-party witnessed) material test reports as standard. Additional certification packages: NACE MR0175 / ISO 15156 (sour service), NORSOK M-650 (subsea / topside), API 6A (wellhead), API 20E (subsea bolting), PED 2014/68/EU (pressure equipment). Third-party inspection by TUV, Lloyd's, BV, DNV, SGS, and Intertek arrangeable on order.

Lead Time & Sizes

Stock items in standard AISI 416c Stainless Steel fastener sizes ship in 1–2 weeks; custom-manufactured items in 4–6 weeks subject to material availability. Diameters M6–M100 and 1/4"–4", lengths 10 mm–3000 mm covered in-house; oversize / non-standard sizes quoted to specification.

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.

AISI 416C Stainless Steel Fasteners