DIN 7968 M7 Titanium Bolt — Precision Fit Fastener for High-Shear Structural Assemblies

The DIN 7968 m7 titanium bolt is a hexagon head fitted bolt with an M7 × 1.0mm thread, manufactured from Titanium Grade 5 (Ti-6Al-4V) with a tensile strength ≥950 MPa and density of just 4.43 g/cm³ — approximately 45% lighter than steel. Unlike standard hex bolts, its precision-ground shank fits tightly into reamed holes to transmit shear forces and prevent joint slippage. At Baoji Huacan, we produce this bolt to custom specifications using 40+ CNC machines, backed by 10+ years of titanium machining experience.

Technical Specifications

Thread Size		M12	M12	M16	M20	M22	M22	M24	M27	M30
d
P		1.75	1.75	2	2.5	2.5	2.5	3	3	3.5
b		17.12	17.12	20.5	23.75	25.75	25.75	26.5	29.5	31.25
ds	max	13	13	17	21	23	23	25	28	31
ds	min	12.89	12.89	16.89	20.87	22.87	22.87	24.87	27.87	30.84
k	Nominal Size	8	8	10	13	14	14	15	17	19
	min	7.55	7.55	9.25	12.1	13.1	13.1	14.1	16.1	17.95
	max	8.45	8.45	10.75	13.9	14.9	14.9	15.9	17.9	20.05
s	max=nominal size	18	19	24	30	34	32	36	41	46
s	min	17.57	18.48	23.16	29.16	33	31	35	40	45
	nut	15.9	15.9	30.8	60.3	80.2	80.2	103	154	216

Elite Motorsport & Automotive: Suspension linkages and chassis subframes benefit from the M7 shank acting as a precision pivot point. It resists high lateral G-forces without ovalizing the mounting bushing — a real advantage in space-constrained non-standard hole patterns.

Marine & Offshore Instrumentation: When securing sonar arrays or optical sensors on vessel hulls, titanium prevents the galvanic corrosion that would seize steel bolts. The fitted shank simultaneously maintains precise sensor alignment.

Aerospace & UAV Structures: Wing spar connections and engine brackets demand shear load transfer without added weight for DIN 7968 m7 titanium bolt. This bolt replaces heavier steel pins while meeting structural airworthiness requirements.

Bicycle & Cycling

Motorcycle Modification

Automotive Performance & Racing

RC Models & Drones

Marine Equipment

Precision Equipment

· Precision shear transfer: The fitted shank transmits transverse loads directly through the bolt body, not through thread friction

· 45% weight reduction versus equivalent steel fasteners

· Corrosion immunity: Resists saltwater, chloride, and galvanic attack

· Non-magnetic: Safe for sensitive electronic and sensor assemblies

· Rolled threads: Enhanced fatigue resistance versus cut threads

· Biocompatible material: Suitable for medical-adjacent applications

Material Features

Standard fasteners simply aren't designed for precision shear environments. The product solves that problem directly.

Our bolt features a precision-ground unthreaded shank, machined to close tolerance classes (k6 or h11), ensuring a true interference or transition fit in reamed holes. This eliminates radial play and prevents hole ovalizing under dynamic lateral loads — something a standard DIN 931 bolt cannot achieve.

With Ti-6Al-4V material, you get non-magnetic permeability, complete chloride corrosion resistance, and biocompatibility in a single fastener. For weight-critical or high-stress assemblies, this combination is unmatched.

Baoji Huacan operates 40+ CNC lathes and machining centers, including gantry systems, with annual precision machining capacity supporting both prototype runs and volume production. Our forging capability — including a 4,000-ton hydraulic press — supports upstream material preparation when needed.

Every bolt starts with certified Titanium Grade 5 bar stock, verified by XRF composition analysis before entering production. The shank is then precision CNC-turned and ground to the required tolerance class.

Threads are rolled — not cut — to improve fatigue resistance at the thread root. This is especially critical for titanium, where thread laps or folds can become fatigue failure points under cyclic loading.

Final machining and surface finishing (anodizing or bright finish) are completed under controlled conditions to meet Ra surface roughness specifications on the shank.


Material Preparation	Heading / Forging	Heat Treatment	Precision Machining

Thread Manufacturing	Cleaning	Inspection	Surface Treatment

Shank diameter is verified using laser micrometers to confirm tolerance class compliance. XRF testing validates Ti-6Al-4V alloy composition. Thread roots undergo microscopic inspection for laps or folds. Tensile and shear testing confirms strength compliance. CMM dimensional inspection and Ra surface finish checks complete the process before shipment.

Certifications

Baoji Huacan holds ISO 9001 quality management system certification, covering raw material selection through final inspection. Full material traceability records, material test certificates (MTC), and EN10204 3.1 documentation are available upon request.

M7 is a non-preferred metric thread size — these bolts are almost exclusively custom-manufactured. You can specify thread length, overall length, shank tolerance class, head style, drive type, and surface finish based on your assembly requirements.

OEM/ODM manufacturing is fully supported. Submit your technical drawings or DXF files, and our engineers will review fit requirements and advise on tolerance class selection before production begins.

Packaging Method	Details
Protective Packaging	Customized foam inserts and vacuum-sealed bags with desiccants to protect precision titanium parts during transportation.
Heavy-Duty Crating	Strong wooden crates for bulk orders, oversized components, and international shipping requirements.
Documentation & Traceability	Product labeling, MTCs, inspection reports, and complete traceability records available upon request.
Shipping Options	Express / air freight for urgent orders; sea freight for large-volume shipments and cost-efficient delivery.

Q: Why use DIN 7968 instead of DIN 931?

A：DIN 931 is a standard clearance-hole bolt. DIN 7968 has a precision shank for reamed holes, enabling true shear load transfer and alignment control.

Q: Can Grade 2 titanium be used?

A：Not recommended. Grade 2 lacks sufficient tensile and shear strength for structural fit bolt applications. Grade 5 is the correct choice.

Q: How do I prevent galling during installation?

A：Apply a Molybdenum Disulfide anti-seize lubricant and use torque values specified for lubricated titanium assembly — lower than dry-assembly values.

Q: What hole tolerance should I use?

A：Ream the mating hole to H7 or H8 tolerance to match the bolt shank (k6 or h11) for the correct interference or transition fit.