Standards
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
Inconel 718 12-Point Bolts (UNS N07718)
Inconel 718 (UNS N07718) is a precipitation-hardening nickel-chromium superalloy that is widely used in jet-engine bolting, gas-turbine hot-section hardware, and rocket-engine structures because it holds 180 ksi tensile strength up to about 700 °C and resists creep, oxidation, and stress-corrosion cracking. The 12-point head is the standard drive geometry on Inconel 718 aerospace bolts under AS3216 (180 ksi superalloy turbine bolt), MS21250, NAS1351, AMS 5662 and AMS 5663 because the twelve splines allow higher applied torque without camming the wrench off the head.
TorqBolt manufactures the full 12-point geometry range in Inconel 718 (flange, head, cap-screw, stud) to AS9100D Rev D and ISO 9001:2015 quality systems, with NORSOK M-630 and NACE MR0175 / ISO 15156 qualifications for sour-service offshore applications. Each bolt head carries the struck tB manufacturer ligature plus the INCO 718 grade marking, and every lot ships with a mill test report (MTC 3.1 standard, MTC 3.2 critical with third-party witness inspection). Deeper Inconel 718 metallurgy, chemistry, and heat-treatment data sit on the parent torqbolt.com resource.
Specifications We Produce
- MS21250, 160 ksi 12-point aerospace bolt
- NAS1351, close-tolerance 12-point
- AS3216, 180 ksi superalloy 12-point
- NAS6303 through NAS6320 tension series
Typical Applications
- Aerospace engine + structural bolting
- Motorsport head studs, rod bolts, main cap bolts
- Diesel-truck performance head studs
- Industrial high-temperature bolting
When to specify this alloy over alternatives
Alloy choice in 12-point bolting is set by the combination of tensile target, service temperature, corrosion environment, and traceability requirement. The default for a generic 160 ksi aerospace bolt is A286 because the supply chain is mature, the AMS specs (5731 / 5732 / 5737) are well documented, and oxidation resistance is good to 700 deg C.
Step up to Inconel 718 when service temperature exceeds 700 deg C or when the joint sees aggressive cyclic stress in jet-engine duty. Step up to MP35N when tensile target is 220+ ksi and the environment is sour-service or saline. Use Ti-6Al-4V when the 56 percent weight savings vs steel matters more than tensile (race-engine main caps, aerospace airframe pylon clip-ups). Use 17-4 PH H1025 when corrosion resistance and 180 ksi tensile both matter and budget rules out cobalt-nickel.
Certification pack with each lot
Mill test report MTC 3.1 ships with every lot at no additional cost: chemistry per the alloy spec, mechanical properties (tensile, yield, elongation at fracture, hardness), microstructure note, and heat-treatment cycle. MTC 3.2 adds third-party witness inspector signature on every test event from raw-bar receiving through final lot acceptance and is required by most aerospace primes for tier-1 critical-service joints. Add MTC 3.2 in the RFQ if your drawing or PO calls for it.
Request a Quote
RFQ to info@torqbolt.com or call +91-22-66157017. Mill test report (MTC 3.1 or 3.2 critical) ships with every lot.
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