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Towbar Caps and Screw Caps: 3D Models to Print

This collection brings together 3D models for towbar covers, screw caps and threaded closures of various shapes. Some entries are decorative shells that hide the towball, while others are functional caps for screws, bottles and small hardware. It is useful when you need a replacement part or want a printed cover instead of a plain one, and every file can be sliced for a desktop 3D printer. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

このコレクションの本文は英語で書かれています。検索自体はどの言語でも使えます。

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このコレクションは、Polyzonが対応サイトの検索結果をもとに作成しています。重複やプレビューのないモデルは除外し、関連性の低いものは後ろに回し、それ以外は検索結果の順に並べています。モデルの権利は各作者にあります。利用条件は各モデルのページでご確認ください。

選定基準：Polyzon編集部 · 本文の更新日：2026年10月13日

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«Towbar Caps and Screw Caps: 3D Models to Print»

Towbar covers appear in two broad groups: sculpted shells with animal, skull or game-inspired shapes, and simple cup or sleeve designs that only cover the ball. Screw-related entries cover cap-head machine screws in a range of thread sizes, knurled caps, and covers that hide a screw head after assembly. Bottle and container closures form a third group, usually modelled around a standard neck thread so the cap can be screwed on and off.

Before printing, open the author's page and read the listed dimensions, since a cover that looks right on screen may not match the diameter of your towball or the thread of your bottle. Check how many parts the model has and whether they are joined after printing or printed as one piece, and look at the notes on supports and orientation. Material guidance matters for parts left outdoors or exposed to weather, so compare what the author recommends with what your printer handles. Photos of finished prints show how the surfaces and edges actually come out.

Search results improve when you vary the wording: try hitch cover, towball cap, ball cover or trailer coupling cover for the same object, and thread designation plus the word cap for hardware. For closures, terms such as bottle cap, jar lid or container closure lead to different files. Related topics worth opening are screw organisers, threaded inserts, print-in-place hinges and small storage containers, since they often share the same thread modelling approach.

FAQ

よくある質問

How do I pick a towbar cover that matches my towball?
Measure the ball diameter and compare it with the dimensions the author lists on the model page. Also check whether the cover is meant to sit loosely or clip on.
Do these caps need supports when printing?
It depends on the shape: flat-backed caps often print without them, while domed or overhanging shells may need them. The author's page usually states the orientation and support settings used.
Which material works for a cap left outdoors?
Authors often list weather-resistant filaments for parts exposed to sun and rain. Check the model page and your own experience with the material before committing a long print.
How can I find a cap for a specific thread size?
Search by the thread designation together with the word cap, then verify the diameter and pitch in the model description. Bottle closures are usually modelled around common neck standards.
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