Outdoor Deck Box Gas Struts 400mm 300N – L & Flat Bracket Kit – Pair
✓ IN STOCK - SHIPS TODAY
Designed specifically for outdoor deck boxes and garden storage units, this 400mm 300N gas strut pair provides controlled, stable and weather-suitable lid assistance for medium-weight outdoor lids.
Unlike indoor chest struts, this configuration is optimised for deeper lid travel and outdoor exposure where wind, lid width and hinge leverage must be considered.
Technical Overview
-
Force Rating: 300N per strut (600N total combined support)
-
Extended Length: 400mm
-
Stroke Length: 150mm
-
Connection Type: 10mm Snap-On Ball Socket
-
Thread Type: M6 Ball Studs Included
-
Bracket Kit: 2x L Brackets (Box Side) + 2x Flat Brackets (Lid Side)
-
Supply: Matched Left & Right Pair
Recommended Lid Depth: 500–800mm (hinge to front edge)
Suitable Lid Weight: 30–54kg (lid only, when using two struts)
Built for Outdoor Geometry
Outdoor deck boxes typically feature wider and deeper lids than indoor chests. The 350mm extended length provides increased travel distance, allowing smooth opening on larger storage units.
- Improves control on wider outdoor lids
- Reduces sudden lid drop in windy conditions
- Supports reinforced plastic or timber panels
- Maintains steady hold-open positioning
The 300N rating delivers balanced lift assistance — strong enough for medium outdoor lids while maintaining smooth, natural movement.
L + Flat Bracket Configuration Explained
This combination kit is engineered for outdoor deck box layouts where:
- The chest wall requires angled mounting (L bracket)
- The lid underside is flat and benefits from a low-profile bracket
- Internal clearance space is limited
The L brackets create a correct offset from the box wall, while the flat brackets provide cleaner lid articulation compared to full 4x L bracket systems.
Installation Positioning Recommendations
- Install one strut per side
- Mount upper bracket approx. 20–30% down from the hinge line
- Place lower bracket approx. 90–130mm below the internal top frame
- Ensure slight compression when fully closed for correct preload tension
Correct positioning directly impacts lifting performance and long-term reliability.
Selecting the Right Force
- Lid below 30kg → this 300N set may feel firm
- Lid above 54kg → consider 400N option
- Lid depth beyond 800mm → consider longer 450mm configuration
Always calculate lid weight only (exclude contents).
Outdoor Performance Benefits
- Controlled assisted opening
- Stable hold-open access
- Reduced hinge strain
- Improved safety in outdoor environments
The 600N combined output provides dependable lift assistance for medium-weight outdoor deck box lids.
Suitable For
- Garden deck boxes
- Outdoor cushion storage chests
- Patio storage trunks
- Composite or timber outdoor storage units
AUTORCE Outdoor Series
- Force-tested lift calibration
- UK stock availability
- 30-day returns (unused)
- UK-based customer support
Upgrade your outdoor storage system with balanced 400mm 300N lift assistance designed specifically for deck box applications.
