Aluminium 7075 U Bolts manufactured at TorqBolt are low density,high strength and highly malleable.
Dimensional standards as per DIN 3572 are provided.
The raw material of these fasteners is classified as Non-Ferrous Alloys. Being a PED certified Fasteners Manufacturer by TUV Rheinland,our fasteners are accompanied with EN 10204 3.1/3.2 certification. Aluminium 7075 U Bolts are available in hot forged,cold forged and bar stock machined conditions depending upon the order quantity.
Aluminium 7075 U Bolts — Specifications & Dimensions
Aluminium 7075 U bolts are externally threaded fasteners with an integral head, manufactured per ASME B18.2.1, ISO 4014/4017, and DIN 933/931. TorqBolt produces Aluminium 7075 U bolts in metric (M6–M100) and imperial (1/4"–4") diameters with custom lengths from 10 mm up to 3000 mm.
Head Styles Available
Hex head — ASME B18.2.1, the workhorse for general bolting
Heavy hex head — thicker head for high-load joints, ASTM A325 / A490 patterns
Socket head cap (SHCS) — ASME B18.3 / DIN 912, ideal where space is limited
Aluminium 7075 U bolts are supplied with full or partial threading. Full-thread (UNC, UNF, ISO metric coarse/fine) for tension-only joints; partial-thread shank for shear loads where the unthreaded grip carries the load. Thread fits per ASME B1.1 (Class 2A) or ISO 965 (6g) by default; tighter Class 3A / 4h6h fits available on request. Engagement length follows the 1.5×D rule for tapped holes; 1.0×D minimum on through-bolting.
Mechanical Performance
Aluminium 7075 U bolts achieve characteristic tensile strength, yield, and elongation per the source-material spec, with proof-load testing and hardness verification per ASTM F606 / ISO 898-1. Torque-tension calibration is published per ASME PCC-1 for critical joints. Each lot ships with EN 10204 3.1 (or 3.2 on request) certificates listing chemistry, mechanicals, hardness, and dimensional inspection.
Custom Configurations
TorqBolt can produce Aluminium 7075 U bolts to drawing, with non-standard heads, drilled-shank variants, double-end, captive, or matched-set configurations. Coatings include zinc, PTFE, Xylan, hot-dip galvanized, and electroless nickel. NACE MR0175 / ISO 15156 sour-service certification on request.
Aluminium Alloys
Aluminium alloys are specified for fasteners where weight reduction, electrical conductivity, or non-magnetic / non-sparking properties dominate the design envelope — aerospace structures, marine spars, electronics enclosures, and industries where reducing reciprocating mass directly improves performance. Density of ~2.7 g/cm³ (one-third of steel) combined with self-passivating Al₂O₃ surface gives respectable corrosion resistance in atmospheric service.
2024 (Al-Cu-Mg) is the high-strength aerospace alloy: yield ~325 MPa in T3 condition, used for airframe structural fasteners. 6061 (Al-Mg-Si) is the general-purpose grade with excellent weldability and corrosion, the standard for marine + structural fasteners. 7075 (Al-Zn-Mg-Cu) is the highest-strength aluminium fastener alloy: yield ~505 MPa in T6 condition, comparable to mild steel at one-third the weight — the dominant material for civilian + military aircraft assembly.
Aluminium fasteners ship per AMS 7222 / 7223 / ASTM F468 (rod) with full mechanical certification including hardness (Rockwell B 60-87), tensile, and conductivity testing. Galvanic isolation is critical when aluminium fasteners contact dissimilar metals in moist environments — cadmium plating or insulating washer + sleeve combinations are commonly specified.
