PG15 30 x 15 mm Three Slot Aluminium Strut Profile Light Panel Frame

OEM / ODM Available Free Sample Available Mill certificate to EN 10204 3.1 on request, RoHS and REACH declarations

30 x 15 mm three-slot aluminium strut profile with 6 mm grooves on a 15 mm pitch. The lightest multi-slot section for display frames and light enclosures using M4 and M5 fasteners.

Wholesale Price Quoted per metre against section, finish and quantity per per metre

Material	Aluminium
Alloy Grade	6063-T5
Temper	T5
Section Size	30 x 15 mm rectangular, three slots
Slot	3 x 6 mm groove, 6.2 mm mouth, 15 mm pitch, 1 per 30 mm face and 1 on a 15 mm face, M4 and M5
Length	6 m stock, cut to drawing to +/-0.5 mm
Tolerance	EN 755-9 / GB/T 6892, wall +/-0.15 mm
Surface	Mill finish / clear anodised / black anodised
MOQ	Made to order; small trial lengths available from stock offcuts
Lead Time	Typically 2 to 3 weeks for mill finish, about a week longer for anodising
Loading Port	Shanghai, Ningbo, Qingdao
Supply Ability	Extrusion capacity for standard and custom dies, with in-house cutting, machining and anodising
Payment Terms	T/T 30 per cent deposit, balance against copy of bill of lading; L/C at sight for larger orders
Trade Terms	FOB, CIF, CFR, EXW
Certifications	Mill certificate to EN 10204 3.1 on request, RoHS and REACH declarations

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01What is the 30 x 15 mm three slot profile?

Why does the 15 series exist at all?

Because there is a class of frames that are too light even for the 20 series. Display cases, exhibition stands, small panel frames and instrument housings do not need M5 or M6 fasteners — M4 is enough, and the frame needs to be as light and as small as possible. The 15 series fills that niche. At 0.55 kg/m and with M4 fasteners, it is the lightest multi-slot section in the T-slot range.

Why three slots and not four?

The 15 mm thickness is too small for a slot on every face. The 30 mm face carries one slot, and one of the two 15 mm faces carries another. The third slot is on the second 15 mm face, giving three total. The remaining 15 mm face is a solid face with no slot — it is used as the visible or mounting face where a clean surface is preferred over a fixing position.

What is the load limit?

Very low. The second moment of area is about 0.1 cm4 on the strong axis and 0.03 cm4 on the weak axis. A 1 m beam under a 30 N centre load deflects about 1.5 mm. The 15 series is for display and light enclosure applications, not for structural frames. If you need to carry load, step up to the 20 series.

02Section data

Item	Value	Note
Envelope	30 x 15 mm rectangular	width 30 mm, thickness 15 mm
Slots	3	6 mm groove, 6.2 mm mouth, 15 mm pitch
Slot layout	1 per 30 mm face, 1 on a single 15 mm face	asymmetric
Central bore	none typically	section is too small for a bore
Wall	approx. 1.2 mm at slot lip	thinnest in the T-slot range
Weight	approx. 0.55 kg/m	from published specification
Alloy	6063-T5	EN AW-6063
Standard	EN 755-9 / GB/T 6892	wall tolerance +/-0.15 mm
Length	6 m stock	cut to drawing to +/-0.5 mm

The 1.2 mm wall at the slot lip is the thinnest in the T-slot range. Per-slot pull-out for an M4 nut is about 0.25 kN, and for an M5 nut about 0.35 kN. These are low figures — the 15 series is not for joints under tension.

03Where the 15 series earns its place

The 15 series is the lightest multi-slot section in the range. It is chosen when the frame weight and size matter more than the load capacity. Three applications cover most of what it does:

Display and exhibition frames: the 0.55 kg/m keeps the frame negligible next to the panels it carries, and M4 fasteners are sufficient for the joint tension. The 30 mm face gives a flat mounting surface for acrylic or aluminium panels.
Light instrument enclosures: where the housing is a shell, not a structural frame, and the three slots give enough fixing positions for panel mounting and a hinge.
Edge trims and panel borders: the 15 mm thickness is small enough to sit behind a panel without protruding, and the solid face gives a clean visible edge.

In all three, the 15 series is chosen because the load is light, the space is tight, and M4 fasteners are enough. If any of those change, the 20 series is the next step up.

04What load can the 15 series carry?

The short answer is: very little. The section modulus is tiny, and the wall at the slot lip is only 1.2 mm. The table below gives the practical load limits for a simply supported beam at various spans.

Span (mm)	Deflection at 20 N centre load	Deflection at 50 N centre load
200	0.04 mm	0.10 mm
300	0.13 mm	0.33 mm
500	0.60 mm	1.50 mm
750	2.0 mm	5.1 mm
1000	4.8 mm	12.0 mm

As a rule of thumb, a 30 x 15 member used as a beam should not span more than 300 mm without an intermediate support. Beyond that, even modest loads produce visible deflection. The 15 series is a frame section, not a beam section.

05M4 and M5 fastener compatibility

The 6 mm groove and 6.2 mm mouth accept the 15 series accessory range: M4 slot nuts, M5 slot nuts (with a snug fit), hammer head T-bolts, cover strips and small hinges. The groove is narrower than the 20 series 6.2 mm groove, so 20 series nuts will not fit without modification.

Fastener	Groove fit	Pull-out force	Typical torque
M4 slot nut	6 mm groove, snug	approx. 0.25 kN	1 to 2 Nm
M5 slot nut	6 mm groove, snug	approx. 0.35 kN	2 Nm
M4 T-bolt	6 mm groove, hammer head	approx. 0.25 kN	1 to 2 Nm
M5 T-bolt	6 mm groove, hammer head	approx. 0.35 kN	2 Nm

The pull-out figures are estimates based on the 1.2 mm wall at the slot lip. They are lower than any other T-slot series. For any joint under tension, use a through-bolt if the section has a bore, or switch to the 20 series.

06Choosing between the 15 series and the 20 series

Choose the 15 series

The frame is a display case or exhibition stand
Weight is critical: 0.55 kg/m is the lightest multi-slot section
M4 fasteners are sufficient for the joint loads
The frame needs a thin profile that sits behind a panel
The frame is temporary or portable and cost is the driver

Choose the 20 series

The frame carries any structural load
You need M5 or M6 fasteners for higher joint tension
Spans exceed 300 mm without intermediate support
The frame is permanent and needs more stiffness
You need the widest accessory range (20 series has the largest ecosystem)

07Failure modes to design out

What goes wrong	Why it happens	Design it out by
Slot nut pulls out under load	the 1.2 mm wall gives only 0.25 kN pull-out	do not use the slots for structural tension; use adhesives or external clamps
Beam deflects too much	the second moment of area is only 0.1 cm4	keep spans under 300 mm or add intermediate supports
Frame racks under lateral load	M4 corner joints are very weak	use corner brackets or gusset plates at every joint
Slot nut deforms the groove lip	overtightening an M5 nut in a 1.2 mm wall groove	keep torque under 2 Nm; use M4 nuts for preference
Profile bends under its own weight at long lengths	0.55 kg/m is light but the section is very flexible	support every 500 mm, or use the 20 series for long members

08What to check before you order

Procurement checklist for the 15 series three-slot

Confirm the fastener size: M4 or M5. If you need M6, step up to the 20 series.
Confirm the span: any member over 300 mm needs an intermediate support or a bigger section.
Confirm the slot layout: one slot on the 30 mm face, one on each 15 mm face. The second 15 mm face is solid. Specify which face is solid on the drawing.
Confirm the finish: mill for hidden use, anodised for exposed service.
Confirm the quantity in metres. A 6 m bar yields twenty 290 mm members with 200 mm of offcut.
If the frame carries lateral load, add corner brackets at every joint. M4 slot nuts alone will not prevent racking.

09Terms used on this page

15 series: The lightest family of T-slot aluminium profiles, with a 6 mm groove, 6.2 mm mouth and M4/M5 fasteners. Section thickness starts at 15 mm.
Second moment of area: A geometric property of the section, in cm4, that determines bending stiffness. The 30 x 15 has about 0.1 cm4 on the strong axis.
Slot lip: The edge of the groove mouth that the slot nut grips from behind. On the 15 series, it is about 1.2 mm, the thinnest in the range.
Pull-out force: The force required to pull a slot nut out of the groove. On the 15 series, about 0.25 kN for an M4 nut.
Racking: The lateral deflection of a frame when a force is applied to one corner. The 15 series resists racking very poorly due to the weak corner joints.

10Questions buyers ask

Can I use 20 series slot nuts in the 15 series?

No. The 15 series has a 6 mm groove, narrower than the 20 series 6.2 mm groove. 20 series nuts will not seat properly. Use 15 series M4 or M5 slot nuts.

What is the maximum span for a 30 x 15 beam?

About 300 mm without an intermediate support. Beyond that, deflection under even a small load becomes visible. For longer spans, use the 20 series or add a support.

What is the difference between the 15 series and the 20 series?

The 15 series has a 6 mm groove and accepts M4 fasteners. It is for display cases and light enclosures. The 20 series has a 6.2 mm groove, M5 and M6 fasteners, and is the smallest practical section for functional frames.

What is the weight per metre?

Approximately 0.55 kg/m, from the published product specification.

Can it be supplied anodised?

Yes. Clear, black, champagne and bronze are standard anodised colours at 10 to 15 micron. Mill finish is available for hidden frames.

What is the lead time?

Typically two to three weeks for mill finish, with anodising adding about a week.

What we need to quote this section

The section drawing or the profile reference GP-SP-3015-3S.
The cut length for each member and the number of members.
The solid face orientation if the slot layout matters.
The finish: mill, clear anodised, or a specified colour.
The annual or per-order quantity, in metres or pieces.
Any certification requirement: mill certificate to EN 10204 3.1.

Send those six items and the quotation comes back with the extrusion price, the cutting charge, the finish surcharge and the lead time broken out separately. Browse the full aluminium profile catalogue and the 15 series aluminium profiles range for related sections.

Need this light panel frame section quoted for your display?

Send the section, the cut list and the finish. We quote extrusion, cutting and anodising as separate lines.

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