Home » Eye Bolts (DIN 444 Type B) - Stainless Steel (A2)

Eye Bolts (DIN 444 Type B) - Stainless Steel (A2)

Eye Bolts (DIN 444 Type B) — Stainless Steel A2 (SUS304)

FULLERKREG DIN 444 Type B eye bolts are manufactured from A2 stainless steel (SUS304) using a combined forging and precision machining process, then finished with whitened passivation for maximum corrosion resistance. The defining feature of DIN 444 Type B is its long threaded shank, which provides a deeper engagement length compared to DIN 580 — making it the preferred choice for applications requiring secure, vibration-resistant attachment through thicker materials or where extended thread engagement is critical.

Product Highlights

  • Brand: FULLERKREG
  • Standard: DIN 444 Type B
  • Material: A2 Stainless Steel (SUS304 / X 5 Cr Ni 18-10)
  • Manufacturing Process: Forged + Precision Machined (Turned)
  • Surface Treatment: Whitened & Passivated (酸洗钝化)
  • Property Class: A2-70 (Stainless)
  • Size Range: M6 – M36
  • Thread: Metric coarse thread per DIN 13
  • Key Feature: Long shank (Type B) — extended thread engagement length

DIN 444 Type A vs. Type B — What Is the Difference?

Feature DIN 444 Type A (Short Shank) DIN 444 Type B (Long Shank) — This Product
Shank Length Short (standard engagement) Long (extended engagement) ✅
Thread Engagement Standard Deeper — more secure in thick materials ✅
Vibration Resistance Standard Enhanced ✅
Typical Use General light-duty lifting Heavy-duty, vibration-prone, thick-plate applications ✅
Eye Shape Closed ring Closed ring

DIN 444 Type B vs. DIN 580 — Key Differences

Feature DIN 580 (Lifting Eye Bolt) DIN 444 Type B — This Product
Standard DIN 580 / ISO 3266 DIN 444
Eye Shape Open ring (forged loop) Closed ring (solid eye) ✅
Shank Length Short Long (Type B) ✅
Manufacturing Forged Forged + Precision Machined ✅
Dimensional Precision Standard Higher (machined finish) ✅
Typical Application General lifting & rigging Machinery, equipment, precision attachment

Why Choose FULLERKREG DIN 444 Type B A2 Eye Bolts?

  • ✅ Forged + precision machined — superior dimensional accuracy and surface finish vs. forged-only alternatives
  • ✅ A2 (SUS304) stainless steel — excellent corrosion resistance for marine, food, and outdoor environments
  • ✅ Long shank (Type B) — deeper thread engagement for secure, vibration-resistant fastening
  • ✅ Closed ring eye — prevents hook disengagement; safer than open-eye designs
  • ✅ Passivated finish — enhanced chromium oxide passive layer for long-term rust protection
  • ✅ DIN 444 compliant — internationally recognized standard
  • ✅ Wholesale & bulk supply — available in large quantities for distributors and OEMs

Dimensional Specifications — DIN 444 Type B Eye Bolts

All dimensions in millimeters (mm). Data strictly referenced from DIN 444 standard drawings.

Thread (d) d2 (mm) d3 (mm) D (mm) b (mm) e (mm) h (mm) l1 (mm) l2 (mm) r (mm) r1 (mm) s (mm) WLL (kg)
M6 11 6.4 22 9 14 11 16 36 5 3 4 100
M8 14 8.4 28 11 18 14 20 45 6 4 5 200
M10 17 10.5 34 13 22 17 25 55 8 5 6 320
M12 20 12.5 40 15 26 20 30 65 9 6 7 500
M16 26 16.5 52 19 34 26 38 85 12 8 9 900
M20 32 20.5 64 23 42 32 46 105 15 10 11 1400
M24 38 24.5 76 27 50 38 54 125 18 12 13 2000
M30 46 30.5 92 33 60 46 66 155 22 15 16 3200
M36 55 36.5 110 39 72 55 78 185 27 18 19 5000

* WLL (Working Load Limit) values are for axial (vertical) loading only. Always verify load ratings with a qualified engineer before use in safety-critical applications. Dimensions are nominal; refer to the full DIN 444 standard for tolerances.

Material & Mechanical Properties — A2 Stainless Steel (SUS304)

Property Value
Material Designation A2 / SUS304 / X 5 Cr Ni 18-10
UNS No. S30400
Property Class A2-70
Tensile Strength (Rm) ≥ 700 MPa (A2-70)
Yield Strength (Rp0.2) ≥ 450 MPa (A2-70)
Elongation (A5) ≥ 20%
Hardness ≤ 250 HV
Corrosion Resistance Excellent — suitable for marine, food & outdoor use
Magnetic Non-magnetic (austenitic)

Chemical Composition — A2 (SUS304) Stainless Steel

Element C (%) Si (%) Mn (%) P (%) S (%) Cr (%) Ni (%)
A2 / X 5 Cr Ni 18-10 ≤ 0.07 ≤ 1.0 ≤ 2.0 ≤ 0.045 ≤ 0.03 17.0–19.5 8.0–10.5

Manufacturing Process — Forged + Precision Machined

  • Step 1 — Hot Forging: Billets of A2 stainless steel are hot-forged to shape the eye and shank, aligning the grain structure for maximum strength and fatigue resistance.
  • Step 2 — Precision Machining (Turning): The forged blank is CNC-turned to achieve tight dimensional tolerances on the shank diameter, thread, and bearing surfaces — ensuring consistent fit and load distribution.
  • Step 3 — Thread Rolling / Cutting: Metric coarse threads are formed to DIN 13 specification for precise engagement with standard tapped holes.
  • Step 4 — Whitening & Passivation: Acid washing removes surface contamination and free iron; passivation enhances the natural chromium oxide layer for superior corrosion resistance.
  • Step 5 — Inspection: Dimensional and visual inspection per DIN 444 requirements before packaging.

Application Scenarios

  • 🏗️ Industrial lifting & rigging — cranes, hoists, and chain blocks where closed-ring safety is required
  • ⚓ Marine & offshore — deck fittings, anchor points, and mooring equipment in salt-air environments
  • 🏭 Food & pharmaceutical processing — hygienic lifting in wash-down environments requiring non-magnetic stainless
  • 🔧 Machine building & OEM — precision attachment points on machinery requiring tight dimensional tolerances
  • 🌊 Outdoor & coastal installations — signage, architectural rigging, structural anchoring
  • 🛠️ Vibration-prone environments — long shank provides deeper thread engagement for secure fastening under dynamic loads
  • 🧪 Chemical & laboratory equipment — mild acid and alkali resistant environments

Product Gallery

FULLERKREG DIN 444 Type B Stainless Steel A2 Eye Bolts — actual product photos:

[Product Photo 1] [Product Photo 2] [Product Photo 3] [Product Photo 4]

Ordering & Packaging Information

  • Packaging: Bulk carton / polybag per size; custom labeling available for OEM and distributor orders
  • MOQ: Contact FULLERKREG sales for wholesale minimum order quantities
  • Lead Time: Standard stock sizes ship promptly; large-volume orders subject to production schedule
  • Certifications: Material test reports (MTR) and inspection certificates available on request
  • Custom Sizes: Non-standard sizes, special thread forms, and custom markings available — contact us

Frequently Asked Questions

Q: What is the difference between DIN 444 Type A and Type B?
A: DIN 444 Type A has a short shank (standard thread engagement length), while Type B has a long shank providing extended thread engagement. Type B is preferred for thick materials, vibration-prone environments, or applications requiring maximum pull-out resistance.

Q: How does DIN 444 differ from DIN 580?
A: DIN 444 eye bolts feature a closed ring (solid eye) and a longer shank, and are manufactured by forging plus precision machining. DIN 580 lifting eye bolts have an open forged loop and a shorter shank. DIN 444 offers higher dimensional precision and a closed eye for improved hook retention safety.

Q: Are these eye bolts suitable for angular or side loading?
A: DIN 444 eye bolts are designed primarily for axial (in-line with the shank) loading. For angular loading, consult the applicable standard and apply appropriate reduction factors. For frequent multi-directional loading, swivel hoist rings are recommended.

Q: What surface treatment is applied?
A: FULLERKREG DIN 444 Type B A2 eye bolts are acid-washed (whitened) and passivated, removing surface contamination and enhancing the natural chromium oxide passive layer for maximum corrosion resistance.

Q: Are these eye bolts non-magnetic?
A: Yes. A2 (SUS304) is an austenitic stainless steel and is non-magnetic in the annealed condition, making it suitable for use near sensitive electronic equipment or in MRI-adjacent environments.

Q: Can I get material test reports (MTR)?
A: Yes. FULLERKREG provides material test reports and inspection certificates upon request for wholesale and OEM orders.

Q: What thread standard is used?
A: All threads are metric coarse (ISO/DIN 13), compatible with standard metric tapped holes.

FULLERKREG — Precision Fasteners to DIN/ISO Standards. All technical data is provided for reference. Always verify load ratings with a qualified engineer before use in safety-critical lifting applications.

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