Approvals and Specifications

Approvals and Specifications

Greentree masking and protection products and engineered systems are used and approved through industry by leading companies worldwide.

In many instances the company has been nominated by companies as the preferred supplier of choice for the range of products and services.

ISO90001

Greentree is an ISO registered company having been first registered in 1997. ​For more information on our quality procedures please see Quality Information

Certificate of Conformity

When you place an order, Certificates of Conformity (COC) are available on request.

NAS and Military Specifications

The following Greentree parts are in accordance with the corresponding specifications.

Spec Number Part
NAS 831 EC,MS
NAS 832 CD,TC
NAS 833 PD,HF
NAS 834 T
NAS 835 ASC
NAS 836 ASP
NAS 837 EP,MS
NAS 838 RP, TF
NAS 839 N/A
NAS 840 P-38B
NAS 841 N/A
NAS 842 ADP
NAS 843 K,RP
NAS 844 SC
NAS 845 N/A
NAS 846 N/A
NAS 847 N/A
SAE AS85049/138 AS138
NASM5501/31 MSC Q2
NASM5501/32 DS Q3


All statements, technical information, and recommendations related to Greentree products are based on information believed to be reliable, however, the accuracy or completeness is not guaranteed. Before using any Greentree product you must evaluate it and determine if it is suitable for your intended application. you assume all risks and liability associated with such use. Any statements contained on your purchase order shall have no force or effect unless expressly agreed upon, in writing, by an authorised officer of Greentree.

CSS13 Approvals

PC21 - OMAT: 2/270A

PC90 - OMAT: 2/207A

KD11 - OMAT: 2/207A