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Petal Expansion Blind Rivet Nut

Split Petal Hollow Wall Anchor Bolt · Class A Industrial Fastener
Carbon Steel Petal Expansion Rivet Nut

Product Overview
This series of petal expansion blind rivet nuts is a cavity‑wall fastening solution sourced and distributed by DISLAB PRECISION. Manufactured from hardened 6.8‑grade carbon steel with a full zinc‑galvanized anti‑corrosion coating, they meet Class A industrial fastener standards. The split‑petal expansion design solves a long‑standing problem: traditional expansion fasteners often fail in thin hollow substrates such as gypsum boards, thin steel sheets, plastic panels, and lamp housings.

The product line includes M4, M5, M6, and M8 thread sizes, with various combinations of nominal length, sleeve length, and outer diameter – totaling 23 matched models to accommodate different wall‑thickness requirements. Unit prices range from USD 0.024 to USD 0.15 per piece. We accept orders as small as one piece for trial, and bulk orders are also welcome. Stock items are shipped from our domestic warehouse, with a typical 3‑day delivery for regional orders.

All finished goods undergo dimensional tolerance checks and tensile load tests before shipping. Customer feedback has been consistently positive – our records show a 100% satisfaction rate, 99% order fulfillment rate, and 32% repeat purchase rate among industrial buyers. This track record has made us a reliable sourcing partner for construction contractors and machinery manufacturers.

2. Product Technical Specifications & Full Size Matching List

Basic Core Technical Parameters

Raw Material: 6.8 grade hardened carbon steel Surface Treatment: Uniform zinc galvanization for rust resistance Product Grade: Class A industrial fastener Execution Standard: National standard metric thread manufacturing Thread Specifications: M4, M5, M6, M8 full metric thread series Single Unit Weight: 88g base specification (customizable per size) Minimum Order Quantity: 1 piece for sample testing Main Sales Coverage: Domestic construction and machinery manufacturing markets, with customizable export packaging available upon request

Complete Dimensional Optional Range

  • Nominal Length (mm): 20, 25, 27, 30, 39, 44, 45, 48, 53, 59, 60, 67, 73, 87, 88
  • Sleeve Length (mm): 16, 17.5, 20, 21, 32, 37, 38, 46, 52, 60, 65, 80
  • Sleeve Outer Diameter (mm): 8, 10, 12, 14, 15
  • Structural Type Options: Petal expansion type, hollow wall tight‑locking type
  • Matching Thread Sizes: M4, M5, M6, M8

Specification Matching Description: The nominal lengths, sleeve lengths, outer diameters, and four thread sizes can be freely combined to create 23 complete finished specifications. These cover almost all common thin‑wall mounting thicknesses used in construction, lighting, HVAC, and machinery applications. When ordering, customers can select parameters based on their panel thickness, hole size, and load requirements. Our sales team is available to help identify the most suitable combination.

3. Product Applications & Pain Points Solved

Core Applicable Industries & Scenarios

🏗️ Construction Industry

Gypsum board partition wall fitting installation, ceiling lamp base fixing, hollow metal wall panel assembly, decorative thin plate mounting.

⚙️ General Equipment Manufacturing

Cabinet thin iron shell component fastening, ventilation air conditioner thin casing assembly, light mechanical housing internal fixing.

🚗 Special Light Assembly

Automotive license plate bracket mounting, plastic thin panel connection, lantern and lighting lamp housing internal locking.

🔧 Key Pain Points Resolved

• Traditional bolts fail in thin hollow substrates – split‑petal design creates large-area inner cavity contact.
• Blind‑type mounting eliminates two‑sided access, reducing assembly time.
• Full galvanization prevents rust in humid environments.
• 23 size options streamline inventory management.
• 1‑piece sample orders support small‑scale testing.

4. Actual Customer Delivery Case

📋 Case Background
In Q1 2026, a domestic medium‑sized air‑conditioner manufacturer – specializing in wall‑mounted light commercial units – contacted us to replace the internal fasteners used in their thin‑metal casings. Their previous imported blind rivet nuts had two main problems: high unit cost and a 14‑day overseas lead time. Local alternatives they had tried failed pull‑out tests on their 0.8mm steel casings, which led to complaints about loose fittings from their own customers.
✅ DISLAB PRECISION Solution & Delivery Process
1. Our engineering team recommended the M6 × 60mm nominal length petal expansion rivet nut based on the customer’s casing thickness and load specs. We provided 50 free samples for tensile and vibration testing within 2 working days.
2. Sample tests showed that our Class A 6.8‑grade galvanized petal anchors maintained stable clamping force after 1,000 vibration cycles – fully meeting the customer’s quality standards. The unit cost was 62% lower than their previous imported parts.
3. The customer then placed a formal order for 120,000 pieces, requesting delivery in three batches within 15 working days. We coordinated with our qualified manufacturing partners, performed full inspections, and shipped the first 40,000‑piece batch to their warehouse in just 3 days.
4. Three months after the final delivery, we confirmed that no loose‑fitting issues were reported. The customer has since renewed a quarterly bulk supply contract and become a regular repeat buyer.

5. Why Choose DISLAB Precision

DISLAB Precision is a global supplier of industrial fasteners, spacers, standoffs, and custom hardware components. We work with a network of over 300 qualified manufacturing partners and ship more than 50 million pieces per month. We support both small sample orders and high‑volume production runs. Every product is inspected for material grade, dimensional accuracy, and surface finish before shipment.

Our team includes more than 40 engineers and sourcing specialists, which allows us to maintain consistent quality, meet delivery deadlines, and adapt to specific customer needs. We offer OEM/ODM services, alternative materials, and flexible packaging options.

6. Frequently Asked Questions (FAQ)

1. What substrate materials can this petal expansion blind rivet nut work with?
It is suitable for gypsum board, thin steel sheet, hard plastic panels, aluminum alloy casings, and hollow lamp housings. It is not recommended for solid concrete or solid wood – for those, we suggest dedicated concrete expansion bolts.
2. Can you make custom thread sizes or sleeve lengths not listed?
Yes, for bulk orders above 50,000 pieces we support OEM custom dimensions. Please send your engineering drawings with the required thread diameter, total length, and sleeve outer diameter. Our technical team will evaluate feasibility and provide a quotation. Custom sample development typically takes 7‑10 working days.
3. How effective is the galvanized coating against rust?
The standard zinc galvanized finish meets indoor anti‑corrosion requirements for construction and machinery assembly. For coastal or outdoor applications with high humidity, we can arrange hot‑dip galvanizing upon request for better salt‑spray resistance.
4. What is the minimum order for a trial sample?
We offer a minimum order of just one piece for trial purposes. For mixed‑size sample batches under 500 pieces, we apply a unified domestic shipping fee to keep small‑order logistics costs low.
5. Can these be exported overseas?
While our standard stock is primarily for the domestic market, we can provide neutral packaging without brand logos, custom carton labeling, and full commercial invoices for customs clearance. Just let our sales team know your export requirements, and we’ll adjust packaging and shipping accordingly.
6. What is the performance difference between the petal expansion type and the hollow wall tight‑locking type?
The petal expansion type offers a larger contact area with the inner cavity wall, which gives higher pull‑out resistance – ideal for brittle substrates like gypsum board. The tight‑locking type has a slimmer sleeve outer diameter, making it better for ultra‑thin metal sheets where hole space is limited. Our technical team can recommend the best variant based on your substrate thickness and load needs.
7. What is the typical delivery time for bulk domestic orders?
For standard in‑stock items, we ship within 1 working day after payment, with an estimated 3‑day door‑to‑door delivery to Shanghai area warehouses. For custom sizes not in stock, production lead time is 7‑12 working days depending on order quantity.

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