What is a DIN 7991 titanium countersunk hex socket screw?

A DIN 7991 titanium countersunk hex socket screw has a flat 90° countersunk head that sits flush after tightening—preventing snags and saving space. BJCJTi makes them in TA2 (soft corrosion-focused) or TC4GR5 (high strength) ideal for mold assembly medical devices drones and premium hardware.

What are the key features of DIN 7991 titanium countersunk screws?

DIN 7991 titanium screws are 40% lighter than steel corrosion-proof (salt spray seawater acidalkali) non-magnetic highlow-temperature stable and flush-mounting with optional anodized finishes. BJCJTi's TC4 versions resist loosening in vibration via even hex-socket force distribution.

Which applications use DIN 7991 titanium countersunk screws?

DIN 7991 titanium countersunk screws fit moldmold-clamp assembly medical devices drone housings cycling accessories precision outdoor gear and corrosion-resistant chemical equipment. BJCJTi supplies them where a smooth flush lightweight rust-free fastening is required.

Are DIN 7991 titanium screws compatible with other titanium parts?

Yes. DIN 7991 titanium countersunk screws pair with titanium flat washers spring washers and DIN 934 titanium nuts as a complete same-material set—avoiding galvanic corrosion and maximizing weight savings. BJCJTi recommends full titanium assemblies for harsh or high-end uses.

News Categories

What are the hardness and characteristics of DIN 7991 countersunk hex socket head cap screws made of titanium alloy?

Q: What hardness does TC4 DIN 7991 titanium screw reach?

TA2 pure titanium runs HB 120–160 (soft tough corrosion-resistant) TC4GR5 annealed is HRC 30–34 and age-hardened HRC 36–40—strength and hardness comparable to 10.9-grade carbon steel with excellent load-bearing and anti-stripping. BJCJTi specifies TC4 for load-bearing DIN 7991 titanium screws.

2026-05-17

DIN 7991 Titanium Alloy Countersunk Hex Socket Screw

I. Hardness of Common Materials

1. TA2 Pure Titanium Hardness: HB 120–160; relatively soft, high toughness, and excellent corrosion resistance; suitable for light-load, corrosion-resistant applications

2. TC4/Gr5 Titanium Alloy (Mainstream): Hardness in the annealed state: HRC 30–34; after age hardening: HRC 36–40. Strength and hardness comparable to 10.9-grade carbon steel screws; excellent load-bearing capacity and resistance to stripping

What are the hardness and characteristics of DIN 7991 countersunk hex socket head cap screws made of titanium alloy

II. Key Product Features

1. Standard specification: DIN 7991 countersunk hex socket head. The flat-head countersunk design ensures the surface is flush after tightening, preventing snags and saving space.

2. Lightweight: 40% lighter than steel screws, significantly reducing the overall weight of the assembly.

3. High Strength and Slip-Resistant: Made from TC4 material with sufficient hardness; the hex socket distributes force evenly for a secure lock, preventing loosening even in vibrating environments.

4. Exceptional corrosion resistance: Resists salt spray, seawater, acids, alkalis, and humid environments; permanently rust-free, outperforming stainless steel.

5. Non-magnetic and eco-friendly: Non-magnetic, causing no interference with electronic components, precision instruments, or medical equipment.

6. Flush mounting: Countersunk and recessed installation, suitable for flush mounting and embedded fastening, resulting in a smooth and clean appearance.

7. High-temperature and low-temperature resistance: Does not soften at high temperatures or become brittle at low temperatures, ensuring stable performance in harsh environments.

8. Multiple surface finishes available: Can be acid-washed and passivated, sandblasted, or color-anodized for an attractive and durable finish.

9. High compatibility: Can be used in combination with titanium flat washers, spring washers, and DIN 934 titanium nuts as a complete set.

III. Applications

In-mold assembly, mold clamping, medical devices, drone housings, cycling accessories, precision outdoor equipment, corrosion-resistant chemical processing equipment, and in-mold assembly for premium hardware.