NRH

Rounded Corner Protector 41.5mm Chrome Plated 3 Holes

SKU: 7505-40-FE-CR
Triangular & Rounded Corner Protectors 7505-40-FE-CR - product overview In Stock

Quick Specifications

SKU7505-40-FE-CR
Weight21 g
Dimensions41.5x41.5x0.9 mm
MaterialCold-Rolled Carbon Steel (SPCC)
OriginChina
CertificationCE, ISO9001, UL, SGS, RoHS
MOQ1
Lead Time7-30 days
SampleAvailable
Unit Price US $0.43 / unit
Min. Order: 1
Factory Direct
ISO Certified
Global Shipping
Share: f X in @
Triangular & Rounded Corner Protectors Cold-Rolled Carbon Steel (SPCC) dimensions chart SKU 7505-40-FE-CR

Rounded Corner Protector for Cases - 41.5mm Chrome Plated 3 Holes

Here's the problem: Standard sharp corners on cases and boxes snag on equipment, catch on clothing, and damage surrounding items during transport. They also create stress points that can crack or split under impact.

You might have tried using flat corners - but they don't solve the snagging issue. Or you've been using plastic rounded corners that crack under pressure and look cheap.

The NRH 7505-40-FE-CR solves this. It combines the durability of steel with a smooth R15 rounded profile - no snagging, no sharp edges, just clean, professional protection that lasts.

Quick Answer: The NRH 7505-40-FE-CR is a chrome plated rounded corner protector with 3 mounting holes, 41.5mm side length, and R15 radius. At 21g with 0.9mm thickness, it provides smooth, snag-free protection for cases, boxes, and equipment that require a rounded profile.

How to know if the rounded corner protector is right for your box:

☑️ You need smooth, snag-free edges

If your cases move through tight spaces or near people, R15 rounded corners eliminate sharp edges that snag and catch.

☑️ Consider your panel thickness

41.5mm side length provides full coverage for standard case panels with a clean rounded finish.

☑️ Think about your aesthetic

Rounded corners provide a softer, more refined appearance than sharp triangular corners - ideal for premium packaging and display cases.

☑️ Check your weight tolerance

At 21g per corner, eight corners add 168g - lightweight protection with a professional rounded finish.

Key Finding: The 7505-40-FE-CR features a unique R15 rounded profile that eliminates sharp edges while providing durable steel protection. At 41.5mm side length with 0.9mm thickness, it offers a refined alternative to standard sharp corners - ideal for cases that need smooth, snag-free edges with a professional appearance.

● In Stock

✓ No Minimum Order

⚡ Ships Same Day


What Makes This Rounded Corner Protector Different

R15 Rounded Profile - Smooth, Snag-Free Protection

The 7505-40-FE-CR features a distinctive R15 rounded profile that eliminates sharp edges and corners. This design prevents snagging on equipment, clothing, and surrounding items during transport and handling. The smooth radius also reduces stress concentration points that can lead to cracking - making it ideal for cases that require both protection and a refined appearance.

41.5mm Side Length - Full Coverage for Standard Panels

With 41.5mm side length, this corner provides comprehensive coverage for standard case panels. The generous dimensions ensure that edges are fully protected without exposed gaps, while the rounded profile creates a clean, professional finish.

Lightweight 0.9mm Steel - 21g

At 0.9mm thickness and 21g weight, this corner offers reliable steel protection without adding unnecessary bulk. The 0.9mm steel provides better impact resistance than 0.5mm options while remaining lighter than 1.2mm+ alternatives - the ideal balance for most standard applications.

Chrome Plated Finish

The chrome plating provides corrosion resistance, surface hardness, and a bright, professional appearance that enhances the look of any case. The smooth chrome surface is also easy to clean and maintain.

3-Hole Fixation System

Three mounting holes (Ø4.5mm) deliver secure fixation with minimal installation effort. Compatible with small rivets, self-tapping screws, or spot welding.


Rounded Corner vs. Sharp Corner: Which One Do You Need?

Feature
Rounded Corner (7505-40-FE-CR)
Sharp Corner
Profile
R15 rounded - smooth, snag-free
Sharp - can snag and catch
Weight
21g - lightweight
5-15g - lighter
Side Length
41.5mm - standard
22-35mm - varies
Thickness
0.9mm - balanced
0.5-0.7mm - thinner
Hole Diameter
Ø4.5mm - standard
Ø3.5-4.2mm - smaller
Best For
Premium cases, display boxes, equipment that needs smooth edges
Small cases, lightweight packaging

When to Choose This Rounded Corner Protector

You need smooth, snag-free edges. The R15 rounded profile eliminates sharp corners that catch on equipment, clothing, and surrounding items. Ideal for cases that move through tight spaces or near people.

You want a refined, professional appearance. Rounded corners provide a softer, more premium look than sharp corners - perfect for display cases, premium packaging, and equipment that clients see.

You need balanced protection. At 0.9mm thickness and 21g, this corner offers reliable steel protection without the weight of heavy-duty options. The ideal choice for most standard applications.

You're working with standard panels. The 41.5mm side length provides full coverage for standard case panels, ensuring complete edge protection with a clean rounded finish.


Technical Specifications

7505-40-FE-CR (This Model)

Model7505-40-FE-CR
MaterialMild Steel
FinishChrome Plated
Weight21g
Side Length41.5mm
Thickness0.9mm
Holes3ר4.5mm
RadiusR15 (rounded)

7505 Series

Model7505-40-FE-CR
Side Length41.5mm
Thickness0.9mm
Weight21g
ProfileRounded (R15)
Holes3ר4.5mm

Data based on engineering drawing 7505-40-FE-CR. For reference only - not for mold making.


Applications

Premium Display Cases

Why this model fits: The R15 rounded profile provides a smooth, refined appearance that enhances display cases and exhibition boxes. No sharp edges to distract from the products inside.

Equipment Cases

Why this model fits: Rounded corners prevent snagging on other equipment during transport and handling. The 0.9mm steel provides reliable protection without excess weight.

Gift & Premium Packaging

Why this model fits: Rounded corners signal quality and attention to detail. The chrome finish and smooth profile elevate the perceived value of premium packaging.

Medical & Laboratory Cases

Why this model fits: Rounded corners eliminate sharp edges that could damage sensitive equipment or injure personnel. The smooth chrome surface is easy to sanitize and maintain.


What Are You Using Now?

If you're currently using sharp corners or no corner protection, upgrading to rounded steel corners provides a professional finish while eliminating snagging and edge damage.

Sharp Corner

⚠️

Snags on equipment
Can damage surrounding items
Stress point for cracking
Industrial appearance

No Corner

Edges wear and split
Looks unfinished
Permanent case damage
High return rate

Rounded Steel

Smooth R15 profile
No snagging
Professional appearance
Low return rate

The bottom line: Rounded corners provide the professional finish that premium cases demand while eliminating the snagging and stress points of sharp corners. The 7505-40-FE-CR combines durability with refined aesthetics at a lightweight 21g.


Installation & Maintenance

Installation:

  • Position the corner against the case edge
  • Mark hole positions using the 3 holes as a guide
  • Pre-drill with a 3.8mm bit (slightly smaller than 4.5mm for tight fit)
  • Secure with small rivets, self-tapping screws, or spot welding

Maintenance & Storage:

  • Wipe with a soft cloth and mild detergent
  • Do not use thinners, strong acids, or strong alkalis - these damage the plating
  • Store in dry, ventilated areas - avoid prolonged damp conditions

Proven in the Field

NRH rounded corners are trusted by manufacturers of premium display cases, medical equipment cases, and high-end packaging worldwide. The 7505-40-FE-CR combines the durability of steel with a smooth R15 rounded profile - making it the preferred choice for applications that require both protection and refined aesthetics.

Common applications include:

  • Premium display and exhibition cases
  • Medical and laboratory equipment cases
  • High-end gift and product packaging
  • Audio and visual equipment cases
  • Instrument and measurement device cases
  • Retail display boxes

About NRH

NRH started manufacturing case hardware in 1996, with over 25 years of brand history.

Four product lines: latches, handles, hinges, and corner protectors. Over 3,000 product variations. OEM/ODM supported.

Certifications:

  • National High-Tech Enterprise (2023)
  • ISO 9001 Quality Management (2018)

Five production and distribution centers: Shanghai HQ, plus Beijing, Guangzhou, Zhengzhou, and Chongqing.


In Stock - No Minimum Order

No 500-piece minimum. No 100-piece minimum. Order 1 piece and we ship.

First-time buyers often need to test fit before committing. Order a few samples. Test them on your cases. Verify dimensions, finish, and installation. When you're satisfied, order production quantities.

Same-day dispatch on payment confirmation.


Key Takeaways

  • R15 rounded profile - smooth, snag-free edges, eliminates sharp corners
  • 41.5mm side length - full coverage for standard case panels
  • 0.9mm thickness - balanced protection at 21g
  • Chrome plated finish - corrosion resistance and professional appearance
  • 3-hole fixation with Ø4.5mm holes - compatible with standard fasteners
  • Perfect for premium display cases, medical equipment, gift packaging, and equipment cases
  • In stock - no minimum order, samples ship same day
  • Customizable in stainless steel and alternative finishes upon request
  • NRH manufacturing case hardware since 1996 - ISO 9001 certified

Contact Sales

Email: nrh-gz@nrh.cn
Phone: +86 180 1797 5137

For bulk pricing, customization, or sample requests, contact our sales team directly.

When inquiring, please provide: Model number + quantity + destination port.

BrandNRH
SKU7505-40-FE-CR
Weight21 g
Dimensions41.5x41.5x0.9 mm
MaterialCold-Rolled Carbon Steel (SPCC)
Country of OriginChina
CertificationsCE, ISO9001, UL, SGS, RoHS
Minimum Order Quantity1
Production Lead Time7-30 days
Stock StatusIn Stock

Triangular & Rounded Corner Protectors Applications

Widely used across industries - from industrial manufacturing to specialized fields, delivering reliable hardware solutions.

Manufacturing & Industrial

Metal corner protectors for equipment cases, preventing impact damage and extending case service life.

Automotive & Transportation

Metal corner protectors for transit cases, absorbing impact during loading and unloading operations.

Logistics & Warehousing

Metal corner protectors for storage cases, preventing damage from stacking and collision in warehouses.

Construction & Engineering

Metal corner protectors for toolboxes, withstanding impacts on construction sites.

Mining & Resources

Steel corner protectors for mining equipment cases, providing protection in harsh environments.

Aerospace

Lightweight metal corner protectors for aviation cases, impact-resistant without adding weight.

Marine & Offshore

Stainless steel corner protectors for marine cases, resisting saltwater corrosion at sea.

Defense & Military

Reinforced metal corner protectors for military cases, proven in battlefield impact conditions.

Audio & Entertainment

Metal corner protectors for stage equipment cases, protecting against impacts during tour transport.

Broadcast & Media

Metal corner protectors for broadcast equipment cases, protecting against impact during field deployment.

Photography & Film

Metal corner protectors for camera cases, safeguarding valuable equipment during outdoor shoots.

Agricultural Equipment

Weather-resistant metal corner protectors for farm equipment cases, built for outdoor exposure.

Fire & Safety

Metal corner protectors for fire equipment boxes, withstanding impact during emergency deployment.

Rail & Transit

Metal corner protectors for railway equipment cases, absorbing vibration impact during transit.

Water Treatment

Corrosion-resistant metal corner protectors for water treatment equipment, durable in humid environments.

What's the difference between rounded corners and sharp corners?

Rounded corners (like the 7505-40-FE-CR) feature a smooth R15 profile that eliminates sharp edges - preventing snagging on equipment and providing a more refined, professional appearance. Sharp corners can catch on surrounding items and create stress points. Choose rounded for premium cases and equipment that needs smooth handling.

What size case needs a 41.5mm rounded corner protector?

The 41.5mm side length provides full coverage for standard cases with panels 10-15mm thick. This size is ideal for display cases, equipment cases, medical cases, and premium packaging that require a professional rounded finish.

Is 0.9mm thickness strong enough for my application?

Yes. 0.9mm steel provides reliable protection for most standard applications - display cases, equipment cases, and premium packaging. It offers better impact resistance than 0.5mm options while remaining lighter than 1.2mm alternatives. For heavy-duty applications, consider the 7201 series with thicker steel.

Can I use 4.5mm holes with standard fasteners?

Yes. The 4.5mm holes accommodate M4 or M4.5 rivets or self-tapping screws. For a precise fit, pre-drill with a 3.8mm bit. This hole size is standard for medium-duty fasteners, providing secure fixation for most applications.

What does R15 mean?

R15 refers to a 15mm radius on the rounded profile of the corner. This creates a smooth, curved edge rather than a sharp point - eliminating snagging and providing a more refined appearance. The R15 radius is clearly visible on the outer edge of the corner protector.

Our Manufacturing Capabilities

NRH factory since 1996 with 10000+ sqm area, QC team and 1500K+ monthly capacity

Factory & Production Scale

NRH 15-step production process from CAD design to storage

Production Process

NRH quality control lab with tensile, salt spray, material and plating tests

Quality Control & Testing

NRH shipping and transport methods by air, sea and express delivery with FedEx DHL UPS

Shipping & Transport Methods

Triangular & Rounded Corner Protectors 7505-40-FE-CR - full view
1 / 5

Contact Us