This is a 3D model of the Estes PNC-5V nose cone that is designed to fit Estes BT-5 airframe tubing.

There are three files you can download. One is of the nose cone, one of the nose cone without the shoulder, and the third is the end cap which has a 1mm hole in it to allow you to add a screw eye or eye bolt.

Estes kits that use this nose cone:
Kit# K-20 Mars Snooper
Kit# TK-1/0801 Mosquito
Kit# 0875 Dragonfly
Kit# 0890 Jammin
Kit# 0897 Lumina
Kit# 1361 Skytracer
Kit# 2063 Mars Snooper

https://www.thingiverse.com/thing:4906295