Rackstuds™ Certification

Rackstuds™ have been independently tested by SGS Labs in Auckland.


Rackstuds™ are subject to rigorous independent testing by SGS (http://www.sgs.co.nz/en/Service-by-Type-Path/Certification.aspx) Labs in Auckland.


We commissioned two test rounds.


1. During the prototyping phase.

2. Once the production tooling was complete.


We performed three tests to measure the tensile strength of a single Rackstuds:


1. Push-In Test

2. Push-Out Test

3. Shear Test

Push-in Test - SGS

We installed a single Rackstud in a rack mount rail with the lock washer latched.  Hydraulic rams pushed the stud through the rail. This would simulate equipment hitting the Rackstuds in a typical equipment loading scenario. We performed two tests to create an average.

The average Push-In number was 46kgs/101lbs.

Pull-out Test - SGS.jpg

SGS constructed a jig using a 5mm steel section to simulate the studs pulling out from the rack. Hydraulic rams attempted to pull the stud through the square hole. In most cases this was not possible as the bolt sheared off before this point. Note the rail starts to buckle at around 85kgs/187lbs.

The average Pull-Out number was 92kgs/202lbs.

Shear Test - SGS

SGS constructed a jig from 5mm plate steel to simulate pulling on the stud in a vertical direction. We performed two tests for an average reading. Like the Pull Out test, the thread section sheared off before the stud was pulled from the hole. It’s worth noting that at 85kgs/187lbs, the rail starts to buckle compromising the hole.

The average shear number was 156kg/343lbs.

Leverage Test - SGS

Leverage testing was also performed by mounting Cisco 1RU switches in our test racks. Using a force gauge we applied increasing pressure to the rear right corner of the switch until a single Rackstuds gave way.  


We performed testing at 38cm/15″ with the switches shown. Extra testing is being undertaken with equipment at deeper depths. Along with different RU spacing’s. Equipment over 38cm/15″ and 1RU, the leverage force can be quite extreme. In these cases, we recommend supporting your equipment at the rear if at all possible.

The amount of force required to shear a Rackstud was 19.3kg/42.5lb.s.



We performed Vibration testing with Underwriter Laboratories - to Specification MIL-STD-810G specification Method 514.6 Proc 1 “Truck transportation over US highways”. This highlighted the extreme forces that could impact the Rackstuds (or cage nuts for that matter) if you transport your 19” rack while populated and without rear support for deep equipment (>300mm/11”).  


Under vibration in the x-axis, the bottom studs failed not long into the punishing one-hour test. We have a YouTube Video that shows the resonance set up in the rack when it’s vibrated with equipment installed. You will note the aluminum colored shaker table does not actually appear to be moving, but the rack and test equipment was vibrating significantly. We inspected the rack after making the video and noted that the vertical rail had cracked around the bottom right cage nut.  


Vibration Testing Conclusion  


We are not able to certify Rackstuds for use in applications where the equipment rack requires transportation when populated. Please read our Disclaimer below.


California Proposition 65 General Statement

May 2018 Rack Studs Limited (NZ) has made every effort to comply with the State of California regulations with regard to products we produce. To the best of our knowledge, the products that we manufacture contain no chemicals that can cause cancer or reproductive toxicity, at levels which would require a warning under the statute. California’s Proposition 65 (The California Safe Drinking Water and Toxic Enforcement Act) entitles California consumers to warnings for products that contain chemicals known to the state of California to cause cancer and or birth defects if those products expose consumers to such chemicals above certain threshold levels. For additional or specific information about Proposition 65, contact the California Office of Environmental Health Hazard Assessment directly for questions and information. Download the PDF here.

RoHS2 Compliance

September 2016 Based on the information provided by our suppliers, and to the best of our knowledge, Rack Studs Ltd designates that all current product ranges (including the packaging) are RoHS compliant and conform to the European Union’s restrictions of the use of hazardous substances (RoHS). Confirmation by our suppliers of the status of compliance is either because the products do not contain any of the restricted substances referred to in article 4(1) of the RoHS directive, or the levels of concentration are below the maximum limit for all of the hazardous substances. Download the PDF here.

Disclaimer (updated Sept 2015)

Rackstuds™ are NOT suitable for use in applications where the rack requires transportation when populated. The maximum equipment weight is 20kg (44lbs). By purchasing and using Rackstuds™ you agree, to the maximum extent permitted by law, that no party (including Rack Studs Limited) will have any liability to you whatsoever for any loss or damages (including any direct loss, loss of profit or anticipated profit, loss of revenue, loss of production, loss of goodwill or reputation, loss of use, loss of opportunity, loss of business, failure to realise anticipated savings, loss of any business opportunity and any other direct, indirect, special or consequential loss) resulting from the use or failure of Rackstuds™ or otherwise in respect of Rackstuds™ whether arising under contract, in tort, from breach of statutory duty or indemnity, or otherwise at law. Rack Studs Limited provides a very specific warranty (further detailed at www.rackstuds.com/certification) and to the maximum extent permitted excludes all other warranties (whether express or implied) and all or any liability. If you do not agree to these terms please immediately return Rackstuds™ product to the place of purchase for a full refund.

Limited Product Warranty

1. Definitions 1.1. For the purpose of this Limited Product Warranty, “Products” mean products which are manufactured, distributed and/or sold by Rack Studs Limited (“RackStuds”) including its manufacturing subcontractors. “You” and “Your” means a customer of RackStuds who has purchased and/or licensed Products from RackStuds. 2. RackStuds Warranty 2.1. RackStuds warrants that, at the time of shipment to You by RackStuds, the Products are free from obvious defects (such as the studs being deformed or the thread not working) and will comply with RackStuds’ normal standards of workmanship for a period of twelve (12) months from the date of shipment to You. 2.2. This Product Warranty will not apply to, and in no event will RackStuds be liable in relation to, Products or parts that have been used for a purpose or in a manner which was not originally intended, or inconsistent with the Product instructions, or to Products or parts which have been subject to misuse, neglect, negligence (including, without limitation, negligent installation or operation), accident, damage while in transit, acts of God (including earthquakes), incorrect installation, incorrect cleaning or maintenance, improper operation, the application of solvents, unauthorised repairs, any alterations or modifications, or any other cause not directly attributable to defects in material or workmanship on the part of RackStuds. 2.3. Additionally, this Product Warranty will not apply to, and specifically excludes, any damage caused to Products used in transportation situations, situations where the equipment is subject to continuous vibration for any period, or for supporting weight of more than 20kgs/44lbs. 2.3. RackStuds shall incur no liability under this Product Warranty unless: a. The allegedly defective Products are returned prepaid to RackStuds within thirty (30) days of the date of discovery of the alleged defect, in accordance with RackStuds’ then current repair procedures; and b. RackStuds’ tests disclose that the alleged defect is due solely to defects in material and workmanship. 2.4. To the maximum extent permitted by law, RackStuds’ liability under this Product Warranty shall in any event be limited, at RackStuds’ option and expense to either the repair or replacement of the defective Product, or the reimbursement of the purchase price paid by You to RackStuds for the defective Products. Any Products replaced by RackStuds will become the exclusive property of RackStuds. 3. Disclaimer Warranty 3.1. TO THE MAXIMUM EXTENT PERMITTED BY LAW: • IN NO EVENT SHALL RACKSTUD BE LIABLE IN CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, EQUITY OR OTHERWISE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES FOR A BREACH OF THIS LIMITED PRODUCT WARRANTY OR OTHERWISE WITH RESPECT TO THE PRODUCTS; • IN NO EVENT SHALL RACKSTUDS’ TOTAL LIABILITY TO YOU OR ANY OTHER PARTY FOR BREACH OF ANY PART OF THE FOREGOING WARRANTIES OR OTHERWISE, EXCEED THE PURCHASE PRICE PAID BY YOU TO RACKSTUDS FOR THE DEFECTIVE PRODUCTS; • THIS PRODUCT WARRANTY POLICY SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF NEW ZEALAND; AND • ANY AND ALL LEGISLATION RELATING TO THE SALE OF GOODS (AND WHICH IS CAPABLE OF EXCLUSION) IS EXCLUDED FROM THIS PRODUCT WARRANTY POLICY AND THE SALE OF THE PRODUCT, INCLUDING (WITHOUT LIMITATION) THE SALE OF GOODS ACT 1908 (NEW ZEALAND), THE CONSUMER GUARANTEES ACT 1993 (NEW ZEALAND), AND THE UNITED NATIONS CONVENTION ON CONTRACTS FOR THE INTERNATIONAL SALE OF GOODS. 3.2. THE EXPRESS WARRANTIES SET OUT IN THIS LIMITED PRODUCT WARRANTY ARE (TO THE MAXIMUM EXTENT PERMITTED BY LAW) IN LIEU OF ALL OTHER WARRANTIES, REPRESENTATIONS OR CONDITIONS, EXPRESSED, IMPLIED, STATUTORY, USAGE OF TRADE OR OTHERWISE, INCLUDING (WITHOUT LIMITATION) MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. YOU SHALL NOT MAKE ANY REPRESENTATIONS OR WARRANTIES OF ANY KIND WHATSOEVER RELATING TO THE PRODUCTS OR TO RACKSTUDS WHICH EXCEED THOSE MADE BY RACKSTUDS IN THIS LIMITED PRODUCT WARRANTY.