# 12pointbolt.com

> Aerospace and motorsport 12-point (bi-hex / double-hex) bolts manufactured by TorqBolt Pvt Ltd. AS9100D and ISO 9001:2015 certified. NAS, MS, AS, MIL, AMS spec coverage in A286, Inconel 718, Ti-6Al-4V, MP35N, Custom 465, 8740 chromoly, 4340, 17-4 PH, L19 race-grade alloy steel.

## Primary Pages

- [12-Point Bolts (homepage)](https://12pointbolt.com/): head term, MS21250, NAS1351, AS3216 specs in 10+ alloys
- [12-Point Fasteners](https://12pointbolt.com/12-point-fasteners): full fastener catalog (bolts, cap screws, flange, head bolts, studs)
- [12-Point Flange Bolts](https://12pointbolt.com/12-point-flange-bolts): flange-head 12-point with serrated under-head face
- [12-Point Head Bolts](https://12pointbolt.com/12-point-head-bolts): engine cylinder head, main cap, rod, flywheel
- [ISO 14579 Disambiguation](https://12pointbolt.com/iso-14579): hexalobular internal (NOT external 12-point)
- [Aerospace Fasteners](https://12pointbolt.com/aerospace-fasteners): AS9100D-certified manufacturer hub

## Aerospace + Mil-Spec Specifications

- [MS21250](https://12pointbolt.com/ms21250): 160 ksi 12-point aerospace bolt
- [NAS1351](https://12pointbolt.com/nas1351): close-tolerance 12-point external-wrenching bolt
- [AS3216](https://12pointbolt.com/as3216): 180 ksi superalloy 12-point bolt for turbine section
- [NAS6303](https://12pointbolt.com/nas6303), [NAS6304](https://12pointbolt.com/nas6304), [NAS6305](https://12pointbolt.com/nas6305), [NAS6308](https://12pointbolt.com/nas6308), [NAS6310](https://12pointbolt.com/nas6310), [NAS6312](https://12pointbolt.com/nas6312), [NAS6315](https://12pointbolt.com/nas6315), [NAS6320](https://12pointbolt.com/nas6320): NAS 6300-series tension 12-point bolts
- [MIL-DTL-7838](https://12pointbolt.com/mil-dtl-7838): legacy mil-spec, replaced by NAS series
- [DIN 12-Point](https://12pointbolt.com/din-12-point-bolts): German metric 12-point

## Variants

- [Stainless Steel 12-Point](https://12pointbolt.com/12-point-bolts-stainless-steel): A286, 17-4 PH
- [Metric 12-Point (M5-M30)](https://12pointbolt.com/metric-12-point-bolts): DIN, ISO threads
- [12-Point Cap Screws](https://12pointbolt.com/12-point-cap-screws): aerospace tension cap-screw family
- [Bi-Hex / Double-Hex Bolts](https://12pointbolt.com/bi-hex-bolts): synonym variants

## Material Pages

- [A286 12-Point Fasteners](https://12pointbolt.com/a286-fasteners): UNS S66286, 160 ksi, 700 °C service
- [Inconel 718 12-Point Bolts](https://12pointbolt.com/inconel-718-bolts): UNS N07718, 180 ksi, jet-engine service
- [Titanium Fasteners](https://12pointbolt.com/titanium-fasteners): Ti-6Al-4V Grade 5, 130 ksi, lightweight aerospace
- [MP35N Bolts](https://12pointbolt.com/mp35n-bolts): UNS R30035, 260 ksi, sour service + diesel head studs
- [L19 Bolts](https://12pointbolt.com/l19-bolts): race-grade alloy steel, 270 ksi

## Motorsport Applications

- [Head Studs](https://12pointbolt.com/head-studs): aftermarket high-strength head studs
- [Connecting Rod Bolts](https://12pointbolt.com/connecting-rod-bolts): race + heavy-duty engine builds
- [Main Cap Bolts](https://12pointbolt.com/main-cap-bolts): bottom-end strength, main bearing cap clamp
- [Flywheel Bolts](https://12pointbolt.com/flywheel-bolts): drivetrain bolt-up
- [Cam Bolts](https://12pointbolt.com/cam-bolts): camshaft hold-down + cam tower
- [Cylinder Head Bolts](https://12pointbolt.com/cylinder-head-bolts): OE replacement and aftermarket performance

## Diesel-Truck Performance

- [6.0 Powerstroke Head Studs](https://12pointbolt.com/6-0-powerstroke-head-studs): Ford 6.0L diesel
- [6.7 Cummins Head Studs](https://12pointbolt.com/6-7-cummins-head-studs): Dodge/Ram 6.7L Cummins
- [Duramax Head Studs](https://12pointbolt.com/duramax-head-studs): GM 6.6L Duramax

## Tool Clarification

- [12-Point Socket (Tool)](https://12pointbolt.com/12-point-socket): the wrench tool that drives external 12-point bolts
- [12-Point Socket Sizes](https://12pointbolt.com/12-point-socket-sizes): metric and inch size chart
- [12-Point vs 6-Point Socket](https://12pointbolt.com/12-point-vs-6-point-socket): engineering comparison
- [12-Point Bolt Head Dimensions](https://12pointbolt.com/12-point-bolt-head-dimensions): across-flats, across-corners, head height
- [External vs Internal 12-Point](https://12pointbolt.com/external-vs-internal-12-point): drive-system disambiguation

## About + Legal

- [About TorqBolt QA-QC](https://12pointbolt.com/about): AS9100D / ISO 9001:2015 manufacturer profile
- [Privacy Policy](https://12pointbolt.com/privacy-policy)
- [Terms and Conditions](https://12pointbolt.com/terms-conditions)

## Cross-Links to TorqBolt Alloy Hub Sites

- [alloya286.com](https://alloya286.com): A286 deep metallurgy hub
- [duplex2507.com](https://duplex2507.com): Super duplex 2507 fastener hub
- [incoloy925.com](https://incoloy925.com): Incoloy 925 fastener hub
- [torqbolt.com](https://torqbolt.com): parent corporate site