DIN7991 Titanium Countersunk Hexagon Bolt High Strength Flat Head M3 M4 M5
- Standard: DIN 7991 / ISO 10642
- Material: Ti-6Al-4V Grade 5
- Drive Type: Hexagon Socket Flush
Export-ready DIN/ISO metric and custom titanium fasteners manufactured directly at our Baoji facility, calibrated for tight tolerances, extreme shear strength, and anti-corrosive industrial applications.
Shoulder bolts—frequently referred to as stripper bolts or precision detent pins—serve as pivot shafts, linear slide guides, and accurate bearing journals across automated stamping dies and high-cycle mechanical assemblies. While conventional chromium-molybdenum 4140 steel or AISI 304/316 stainless steel bolts have historically formed the industrial baseline, advanced automated facilities in Southeast Asia increasingly specify Ti-6Al-4V Grade 5 titanium shoulder bolts.
The primary metallurgical advantage lies in the extraordinary strength-to-weight ratio and dynamic inertia reduction. Titanium shoulder screws exhibit a nominal density of 4.43 g/cm³ compared to 7.85 g/cm³ for alloy steel—a 44% reduction in reciprocating mass. When employed as guide shafts or articulating pivots in high-speed pick-and-place pickers or stamping stripper plates cycling at over 400 strokes per minute, this mass attenuation substantially curbs bearing friction, reduces motor wattage consumption, and mitigates cyclical shear fatigue.
Design Tip: Titanium forms an instantaneous, regenerative rutile (TiO₂) oxide layer. In high-humidity tropical manufacturing regions like Biên Hòa, Grade 5 titanium bolts completely prevent chloride pitting and atmospheric oxidation that otherwise seize carbon steel shafts inside bronze or composite bushings.
Furthermore, Yevzo manufactures titanium shoulder fasteners featuring unthreaded shank diameters ground to ISO h7 or h6 tolerances. Utilizing our five-axis CNC turning and Swiss sliding-head lathes in Baoji, we maintain absolute concentricity between the unthreaded bearing shank, the under-head transition radius, and the rolled thread. This eliminates stress concentrations at the shoulder junction under heavy lateral shear loads.
| Mechanical Metric | Gr5 Titanium (Ti-6Al-4V) | Gr2 Titanium (CP) | Alloy Steel (10.9) |
|---|---|---|---|
| Ultimate Tensile Strength | ≥ 895 - 1050 MPa | ≥ 345 - 450 MPa | 1000 - 1040 MPa |
| Yield Strength (0.2% Offset) | ≥ 828 MPa | ≥ 275 MPa | ≥ 900 MPa |
| Density | 4.43 g/cm³ | 4.51 g/cm³ | 7.85 g/cm³ |
| Modulus of Elasticity | 114 GPa (Flexible) | 103 GPa | 210 GPa (Stiff) |
| Magnetic Permeability | 1.00005 (Non-Mag) | 1.00005 (Non-Mag) | Ferromagnetic |
| Corrosion in Chloride | Immune (<0.001 mm/yr) | Immune | Rapid Pitting / Rust |
Biên Hòa stands as one of southern Vietnam's core industrial bastions. Yevzo supplies specialized titanium shoulder bolts, socket cap screws, and CNC components engineered to solve harsh operating constraints across the city's key industrial parks.
Biên Hòa's prominent plastic injection molding plants run high-cavity molds with moving core mechanisms and stripper plates. Standard steel shoulder bolts suffer from thermal expansion mismatch and corrosive vapor degradation from resins. Yevzo's ground Gr5 shoulder bolts provide low thermal expansion, excellent galling resistance against bronze bushings, and frictionless kinematic movement across millions of cycles.
Semiconductor and consumer electronics lines require cleanroom-compatible fasteners that do not shed particulate flakes. Nickel-plated or zinc-coated steel bolts pose contamination risks via flaking. Our plain-finish and anodized non-magnetic titanium shoulder bolts are completely inert, rustless, and safe for micro-electronic robotic end-effectors and optical inspection turntables.
With major automotive and two-wheeler sub-suppliers operating throughout Đồng Nai province, high-stress braking systems, clutch pivots, and suspension linkages require extreme yield strength. Yevzo supplies Grade 5 hex, umbrella head, and custom cantilever pivot bolts with tensile thresholds up to 1050 MPa, offering direct weight reduction without structural compromise.
Loteco and surrounding clusters harbor chemical packaging, agricultural fertilizer processing, and beverage bottling plants. Industrial wash-down fluids containing sanitizing agents and chlorine cause rapid breakdown of 304 stainless fasteners. Yevzo's commercially pure Grade 2 and alloyed Grade 5 fasteners maintain near-zero corrosion rates in acidic and washdown environments.
Textile mills in Đồng Nai run high-frequency reciprocating loom components susceptible to mechanical vibration. Heavy steel shoulder bolts tend to loosen or shear under harmonic vibration. Titanium's lower modulus of elasticity (114 GPa) absorbs shock energy and dampens dynamic shock loads, preserving threaded housings and extending machinery uptime.
Analyzing procurement transformations across Đồng Nai and Greater Ho Chi Minh City industrial zones reveals three primary macro trends shaping how procurement managers source high-precision hardware.
Driven by foreign direct investment (FDI) from Japan, South Korea, and Europe, factories in Biên Hòa are upgrading preventive maintenance intervals. The cost of an unplanned production stoppage caused by a sheared or rusted M6 shoulder screw far exceeds the initial raw material delta. Plant operators increasingly mandate factory-certified Gr5 titanium bolts for all moving tooling journals to guarantee 2-3x longer service life.
Historically, Vietnamese machine shops bought imported Chinese titanium stock through regional trading intermediaries in District 5 or Binh Duong, facing inflated margins and non-traceable material grade mixing. Today, OEM procurement teams establish direct relationships with Baoji source manufacturers like Yevzo, obtaining certified EN 10204 3.1 chemical inspection sheets and lower pricing on wholesale production runs.
Standard DIN 912 socket screws or standard shoulder lengths frequently fail to match custom automated fixtures. Machine builders in Amata and Long Binh demand tailored shoulder step lengths, specific under-head reliefs, hollow drilling for weight minimization, and selective anodizing to color-code replacement assemblies. Yevzo's CAD/CAM engineering team bridges this need via fast blueprint quoting.
Yevzo Titanium Metal Co., Ltd. operates from the Honeycomb Industrial Park within the High-Tech Development Zone of Baoji, Shaanxi. Sourcing raw titanium sponge and bar stock directly at the epicenter of China's titanium industry allows us to ensure unmatched quality, certified chemistry, and unbeatable factory pricing.
We are a dual-capability manufacturer and direct exporter with premises verified onsite by global inspection bodies. No intermediary broker markups; direct engineering communication.
Equipped with 3-axis, 4-axis, and 5-axis CNC machining centers, precision thread-rolling machines, and optical profile projectors ensuring strict tolerance fulfillment.
Every batch of Gr2 and Gr5 titanium bar complies strictly with ASTM B348 standards, complete with comprehensive Mill Test Certificates (MTC) stating heat lot and chemical composition.
In-house vibratory deburring, precision polishing, vacuum PVD coating, and electro-anodizing in gold, violet, burnt blue, and tactical black for surface passivation.
Clear, technical, and commercial answers addressing cross-border shipping, material standards, anti-galling practices, and import handling for Vietnamese manufacturing enterprises.
Send your bill of materials, engineering drawings, or sample specs directly to our production engineers. We provide detailed pricing proposals, material test verification, and delivery timelines within 24 hours.
Contact Us