TorqBolt is renowned for manufacturing and stocking PED certified high tensile Astm F568 Grade 10.9.3 D Fasteners.
Astm F568 Grade 10.9.3 D Fasteners Properties
TorqBolt manufactures ASTM F568 Grade 10 9 3 D 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 ASTM F568 Grade 10 9 3 D Fasteners batch is supplied with EN 10204 3.1 or 3.2 material test certificates.
ASTM F568 Grade 10 9 3 D Fasteners — Material Overview & Form Factors
ASTM F568 Grade 10 9 3 D is a high-performance alloy used wherever standard fasteners cannot meet the corrosion, temperature, or strength envelope. TorqBolt manufactures the full ASTM F568 Grade 10 9 3 D 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 ASTM F568 Grade 10 9 3 D Excels
ASTM F568 Grade 10 9 3 D 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.
Custom forgings — rings, blanks, shaped components to drawing
Standards & Certification
ASTM F568 Grade 10 9 3 D 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 ASTM F568 Grade 10 9 3 D 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.
ASTM Carbon & Alloy Steel Bolting Specifications
The ASTM A193 / A194 / A320 / A325 / A490 / F568 family covers the dominant carbon and low-alloy steel bolting standards for pressure vessels, structural steel, and high-temperature service. Each spec defines composition, heat-treat condition, mechanicals, and acceptance testing per the application's safety classification.
ASTM A193 Grade B7 is the workhorse: AISI 4140 chrome-moly steel, quench + temper to yield 105 ksi min, the default for ASME flanged-joint stud bolts to 500°C. Grade B7M is hardness-controlled (≤ HRC 22) for sour service per NACE MR0175. Grade B16 uses Cr-Mo-V chemistry for service to 600°C (steam-turbine bolting). ASTM A320 L7 / L7M / L43 are the cryogenic-service variants tested per Charpy V-notch at -101°C (-150°F). ASTM A194 grade 2H / 7 / 7M / 16 are the matching nut grades.
ASTM A325 / A490 are the structural-steel high-strength bolts for buildings + bridges. ASTM F568 class 8.8 / 10.9 / 12.9 covers the metric high-strength bolt grades. EN 10204 3.1 / 3.2 certificates standard, with hardness, tensile, Charpy impact, and through-hardening checks per the lot release procedure.
