Product Summary

Longze Heavy-Duty Expansion Anchors (Wedge Anchors) are high-performance mechanical anchors designed for permanent anchoring in cracked and non-cracked concrete. Manufactured in

Yongnian, China, our through bolts feature a precision-cold-formed mandrel and a 360-degree expansion clip for maximum grip and safety in heavy-load structural applications.

• ✔ High-Load Security: Large expansion clip ensures even load distribution and high pull-out resistance.

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• ✔ Versatile Sizing: Available in full range of Metric and Fractional Inch sizes for global projects.

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• ✔ Durable Materials: Choose from Carbon Steel for indoor use or Stainless Steel 304/316 for corrosive outdoor environments.

• Standards: ASTM E488, DIN 15237, ISO 898-1.

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• Diameter Range: M6 - M24 | 1/4" - 1".

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• Length Range: 50mm - 300mm (2" - 12").

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• Material Grade: Carbon Steel Class 5.8/8.8 | Stainless Steel A2-70/A4-80.

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• Surface Finish: Zinc Plated, Yellow Zinc, Hot Dip Galvanized (HDG), Dacromet.

Mechanical Properties & Material Standards

• Matching the steel grade to the structural requirements of the transmission line.

• Property Class	Материал	Tensile Strength (min)	Yield Strength (min)	Hardness Range
  Class 5.8	Low Carbon Steel	500 MPa	400 MPa	71 - 95 HRB
  Class 8.8	Medium Carbon	800 MPa	640 MPa	22 - 32 HRC
  SS304 (A2-70)	Нержавеющая сталь	700 MPa	450 MPa	200 - 280 HV
  SS316 (A4-80)	Нержавеющая сталь	800 MPa	600 MPa	240 - 320 HV

Standard Cross Arm Dimensions

• Common angle steel configurations for standard utility pole mounting.

• Thread Size (D)	Drill Bit Size	Anchor Length (L)	Max. Fixture Thick	Min. Embedment
  M10 (3/8")	10 mm	80 - 120 mm	10 - 45 mm	50 mm
  M12 (1/2")	12 mm	100 - 150 mm	15 - 60 mm	65 mm
  M16 (5/8")	16 mm	120 - 200 mm	20 - 90 mm	85 mm
  M20 (3/4")	20 mm	150 - 250 mm	30 - 120 mm	105 mm

Galvanizing & Corrosion Resistance

• Ensuring 30+ years of service life in corrosive environments.

• Surface Treatment	Coating Thickness	Salt Spray Test	Service Life	Приложение
  Zinc Plated	5 - 8 μm	48 - 72 Hours	High	Indoor / Dry
  Yellow Zinc	8 - 12 μm	72 - 96 Hours	Excellent	Humid Indoor
  Hot Dip Galv	≥ 45 μm	500 - 800 Hours	Maximum	Outdoor / Infrastructure
  Dacromet	8 - 10 μm	500 - 1000 Hours	Structural	High Tension

Avoid Pitfalls:

• Expansion Clip Thickness: We use thickened stainless steel or carbon steel clips to prevent "spinning" in the hole, ensuring immediate grip upon torque application.

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• Mandrel Quality: Poorly formed mandrels snap under high tension. Longze anchors feature cold-formed, stress-relieved mandrels for zero-failure performance.

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• Thread Precision: All threads are rolled to 6g/2A tolerances, ensuring the nut spins on easily even after heavy-duty surface treatment.

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Perfect Fit Assembly:

• Through-Fixing Design: Allows you to drill through the fixture and into the concrete in one step, saving up to 50% installation time.

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• Complete Hardware: Every wedge anchor is supplied with a Standard Flat Washer и Шестигранная гайка specifically matched to the anchor's strength class.

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Quality Control & Logistics:

• ISO 9001 Certified: 5-step QC including pull-out simulation tests in C25/30 concrete and coating thickness verification.

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• Sea-Worthy Packaging: Reinforced carton boxes with moisture-proof lining, shipped on Fumigation-Free Pallets from our Yongnian hub.

• Q: Can these be used in cracked concrete? A: Yes, our wedge anchors are designed for reliable performance in both cracked and non-cracked concrete in accordance with ETAG standards.

• Q: What is the lead time for Stainless Steel 316 wedge anchors? A: SS316 items are typically produced in 10 - 15 days to ensure the highest material purity and corrosion resistance.

• Email:eric@lzfastener.com  What'sApp:+86 15350500528 WeChat:+86 18830006928 or 15350500528