Grade 5 Titanium Flange Nuts
Grade 5 titanium flange nuts are Ti-6Al-4V hex nuts with an integral flange that provides a wider bearing surface. Plain and serrated flange configurations can be reviewed, but nut geometry, thread, mating fastener, bearing surface, locking method and installation procedure must be specified as one joint system.
Product Specifications
| Material | Titanium Grade 5 / Ti-6Al-4V / UNS R56400 |
| Configurations | Plain flange nut and serrated flange nut; drawing-specific prevailing-torque or locking options by review |
| Dimensional basis | Applicable DIN/ISO/ASME geometry or controlled customer drawing when expressly stated |
| Threads | Metric coarse/fine, UNC, UNF or drawing-specific internal thread with agreed class and gauging |
| Key dimensions | Thread, across-flats, nut height, flange diameter/thickness, bearing face and serration geometry |
| Surface condition | Cleaned and deburred; polished, coating or qualified lubricant by agreement |
| Documents | MTC, heat/lot traceability and dimensional report; proof-load or other testing when specified |
Size range, minimum quantity, stock and lead time are confirmed at quotation. Finished-nut performance is not established by raw material grade alone.
Plain or Serrated Flange?
A plain flange distributes bearing load over a wider area and may reduce local surface pressure. It does not automatically eliminate the need for a washer; hole size, joint material, electrical isolation and the governing design determine the complete bearing arrangement.
Serrations can increase resistance to rotation by engaging the mating surface, but they may damage coatings, raise removal torque and be unsuitable for soft or finished surfaces. Serration direction, geometry, prevailing torque and reuse policy should be defined rather than assumed.
Material and Standard Considerations
Grade 5 Ti-6Al-4V offers higher strength than commercially pure titanium and may be evaluated for marine, offshore, aerospace, motorsport and industrial assemblies. Applicable ASTM F467/F467M requirements may be invoked where the alloy, size and product scope match. A dimensional reference developed for steel or stainless steel can only serve as agreed geometry; titanium material and performance requirements must be separately stated.
For custom products, the drawing should define across-flats, height, flange diameter, flange thickness, bearing face, serration details, thread relief, chamfers and tolerances. The mating bolt or stud specification must be supplied so thread stripping and proof-load relationships can be reviewed.
Marine and Chemical Applications
Grade 5 titanium flange nuts may be considered for pipe supports, brackets, deck equipment, chemical-equipment covers, lightweight fixtures and corrosion-resistant machinery. The service review should identify seawater or chemical composition, concentration, temperature, contaminants, wet/dry cycling and mating materials.
Titanium is relatively noble in seawater. When connected to carbon steel, aluminum or another dissimilar metal, exposed-area ratios and electrolyte contact can drive galvanic corrosion of the less noble component. Isolation washers, sleeves, coatings, drainage and inspection access may be required.
Galling and Installation Control
Titanium internal and external threads can gall. Use clean, undamaged threads, controlled installation speed and a qualified lubricant or coating where approved. Lubrication changes the torque–tension relationship, so a dry torque value must not be reused after adding lubricant. Critical joints require validated assembly procedures and defined replacement or reuse criteria.
A serrated flange does not compensate for inadequate preload or an unsuitable joint. Locking performance should be validated for vibration, temperature, bearing material and maintenance conditions.
Inspection and Traceability
Available inspection options can include chemical certificate review, dimensional measurement, internal-thread gauging, visual examination, flange runout or flatness checks, surface-condition verification and mechanical tests required by the purchase specification. Agree heat/lot traceability, sampling and report format before production.
Information Required for Quotation
- Grade 5 / Ti-6Al-4V / UNS R56400 and governing material specification.
- Plain or serrated flange and standard/drawing revision.
- Thread diameter, pitch, class and mating bolt/stud specification.
- Across-flats, nut height, flange dimensions and quantity.
- Bearing material, locking method, reuse policy and installation procedure.
- Finish, coating/lubricant, MTC, traceability and testing.
- Service environment, temperature and connected materials.
Request Grade 5 Titanium Flange Nuts
Send the nut form, thread, flange dimensions, mating fastener, quantity and documentation for a manufacturability and quotation review.
Frequently Asked Questions
Does a flange nut replace a flat washer?
Not automatically. Bearing stress, hole size, surface protection and electrical isolation determine whether a washer remains necessary.
Are serrated titanium flange nuts reusable?
Reuse depends on the approved joint design, serration condition, prevailing torque, mating surface and maintenance procedure.
Can matching Grade 5 bolts be supplied?
Matching Grade 5 titanium bolts, screws, studs and washers can be reviewed as a documented fastening set.