Shopping list
Everything the 20 latches need that isn't printed, with an example of where to buy it. The links are for Greece: Grobotronics for most fasteners, shafts and filament, other Greek shops for what it doesn't stock, and a shop abroad (marked with its country) where no Greek shop had it. Where there are several links, the first is the one to try first: a Greek shop if its match is good enough, otherwise the closest match. The last column but one gives the Greek name to ask for at a hardware store (σιδεράδικο). Prices and stock are as checked on 1–2 November 2026; they change. Prefer A2 or A4 stainless for anything outdoors; where a link is plain or hardened steel, the notes say so. Most shops abroad don't say on the product page whether they deliver to Greece, so check at the checkout.
Every mechanism page lists what it needs, with quantities, under Parts.
| Item | What to buy | Where | Notes | At a hardware store | Used in |
|---|---|---|---|---|---|
| ASA filament | 1.75 mm, 1 kg; for every rigid part | Grobotronics: Elegoo ASA 1kg – Grey (1 kg), €16.80 | 1.75 mm, in stock. | νήμα ASA 1.75 mm | all |
| TPU filament | TPU 85A, 1.75 mm; for the seals | 3DHUB: Bambu Lab TPU 85A, 1.75 mm (1 kg), €49.90 · or Grobotronics: eSUN eFlex TPU-87A 1.75mm 1kg (1 kg), €39.90 | 3DHUB: Pick TPU 85A on the page (it also sells 90A at €45.90). Only Lime Green and Neon Orange were in stock. Bambu says it can't go through an AMS or AMS lite, only an AMS HT. Grobotronics: No 85A sold; 87A is the closest. | νήμα TPU 85A | all |
| M3 socket screws | DIN 912, A2/A4; 8, 10, 14 and 16 mm long | Grobotronics: Βίδα M3 - DIN912 Ανοξείδωτη (per piece; 100+ discount), €0.08 (L10) / 0.06 (L14, L16) | Stainless (A2 suffix); lengths 4,6,8,10,14,16,20,30 mm, no L12. | βίδα άλλεν M3 inox DIN 912 | 2 ×4, 3 ×4, 4 ×1, 5 ×1, 6 ×2, 7 ×2, 8 ×2, 10 ×2, 11 ×3, 12 ×2, 14 ×2, 15 ×2, 16 ×2, 17 ×2, 18 ×4, 19 ×2, 20 ×2 |
| M3 square nuts | DIN 562, 5.5 × 1.8 mm | Grobotronics: Παξιμάδι Μ3 Ατσάλινο Τετράγωνο - 100 Τμχ. (100 pcs), €1.40 · or BefestigungsFuchs: DIN 562 square nut, A2 stainless, M3 [DE] (1, or packs of 100, 200 and 500), €0.46 each · or Würth Hellas: DIN 562 square nut, A2 stainless | Grobotronics: Plain steel, not stainless; 5.5 mm across flats, thickness not stated. BefestigungsFuchs: The stainless version, 1.8 mm thick. Würth Hellas: Trade customers only: log in, or ask at a Würth branch for the price. The size list didn't load, so check M3 is there. | τετράγωνο παξιμάδι M3 DIN 562 inox | 2 ×4, 3 ×4, 4 ×1, 5 ×1, 6 ×2, 7 ×2, 8 ×2, 10 ×2, 11 ×3, 12 ×2, 14 ×2, 15 ×2, 16 ×2, 17 ×2, 18 ×4, 19 ×2, 20 ×2 |
| M3 washers | A2/A4; 9 mm across (DIN 9021) where the list says so, otherwise DIN 125 | Inox Store: DIN 9021 wide washers, A2 stainless (50 (pick Φ3 × 9 mm)), €2.80 · or Grobotronics: Ροδέλα M3 Stainless A2 - 100τμχ (100 pcs), €1.00 | Inox Store: The 9 mm washers. In stock. Grobotronics: A2, 3.2 × 7 mm (DIN 125, not DIN 9021); sold out when checked; steel fallback link | ροδέλα M3 inox | 4 ×1, 5 ×1, 11 ×1 |
| M3 spacer | unthreaded, 3.2 mm hole, 6 mm across, 5 mm long | Grobotronics: Αποστάτης Μεταλλικός ID3.2mm (L5 variation) (per piece), €0.20 | Brass, 3.2 × 6 mm; lengths 3-30 mm; ships in 1-3 days. | αποστάτης M3 6x5 mm | 5 ×1 |
| M4 screws, nuts and washers | DIN 912, A2/A4, 20 and 25 mm; nuts and washers | Grobotronics: Βίδα Μ4 - DIN912 Ανοξείδωτη A4 (per piece), €0.10 (L10/L16), 0.15 (L25) | Nuts: link (A2, 100 pcs, 1.40). | βίδα άλλεν M4 inox | 2 ×1, 7 ×1, 17 ×1 |
| M4 nyloc nuts | DIN 985, A2/A4 | Grobotronics: Παξιμάδι M4 Ασφαλείας Ανοξείδωτο A4 (min 100 pcs), €0.08 each (0.04 at 100+) | A4 stainless; sold out when checked. Plain steel fallback: link | παξιμάδι ασφαλείας M4 inox DIN 985 | 2 ×1, 7 ×1, 8 ×1, 17 ×1 |
| M4 eye bolts | DIN 444 type, A2/A4, M4 × 40 (M4 × 70 for the spring latch); the eye at most 10 mm across | Amazon.de: M4 eye bolts, A2 stainless [DE] (5), €6.14 | The page gives no length, eye size or DIN type: check the eye is at most 10 mm across and 5.5 mm thick. Free delivery to Greece on orders over €59. DIN 444 eye bolts start at M5, so no true M4 one was found. | μπουλόνι με μάτι (κρικοβίδα) M4 inox DIN 444 | 7 ×1, 8 ×1 |
| M5 socket screws | DIN 912, A2/A4, 25, 30, 40 and 50 mm | Grobotronics: Βίδα Μ5 - DIN912 Ανοξείδωτη (per piece), €0.16 (L40) / 0.20 (L50) | A2 socket screws 10-60 mm; no M5 threaded rod. | βίδα άλλεν M5 inox DIN 912 | 2 ×1, 3 ×1, 6 ×1, 10 ×1, 16 ×1 |
| M5 nuts | DIN 934, A2/A4 | Grobotronics: Σετ Παξιμάδια από Ανοξείδωτο Ατσάλι M3-M10 – 300τμχ (300-pc kit (M5 x70)), €9.60 | Stainless DIN 934 assortment; no DIN 439 jam nut found. | παξιμάδι M5 inox DIN 934 | 2 ×1, 6 ×3, 10 ×3 |
| M5 nyloc nuts | DIN 985, A2/A4 | Grobotronics: Παξιμάδι M5 Ασφαλείας Ανοξείδωτο (min 100 pcs), €0.06 each | Stainless nyloc, AF 8. | παξιμάδι ασφαλείας M5 inox DIN 985 | 2 ×1, 3 ×2, 16 ×1 |
| M5 washers | A2/A4; 15 mm (DIN 9021) or 18 mm (DIN 440) across where the list says so, otherwise DIN 125 | Inox Store: DIN 9021 wide washers, A2 stainless (50 (pick Φ5 × 15 mm)), €3.20 · or Grobotronics: Ροδέλα Μ5 Ανοξείδωτο Ατσάλι Α4 - 100 Τμχ. (100 pcs), €1.80 | Inox Store: The 15 mm washers. In stock. No 18 mm (DIN 440) washer found. Grobotronics: A4, 5.3 × 10 mm (DIN 125); no 15 or 18 mm OD washer found. | ροδέλα M5 inox φαρδιά DIN 9021 | 2 ×1, 3 ×1, 8 ×1, 16 ×1 |
| M5 eye bolts | DIN 444 type, A2/A4, M5 × 50; the eye 12–13 mm across | Schraubenhandel24: DIN 444 eye bolts, form B, A2 stainless, M5 [DE] (10), €5.50 (for 40 mm) · or Nanakis: Stainless eye screw, A4, 5 × 50 mm (1), €1.30 | Schraubenhandel24: Pick the 50 mm length (the price shown is for 40 mm). A DIN 444 M5 eye is 12 mm across and 6 mm thick, which fits both latches. Nanakis: Greek shop in Chania, in stock. «Στριφώνι» usually means a wood-screw thread and the eye size isn't given: check it has an M5 machine thread before buying. | μπουλόνι με μάτι (κρικοβίδα) M5x50 inox DIN 444 | 2 ×1, 3 ×1 |
| M5 hex standoff | female both ends, 8 mm across flats, 15 mm long (or a DIN 6334 coupling nut); cross-drill it 4.2 mm | Grobotronics: Αποστάτης M5 Steel F/F (L15) (per piece), €0.60 | Steel hex standoff, 8 mm AF, 15 mm, threaded right through; not stainless. | μακρύ παξιμάδι (μούφα) M5 DIN 6334 | 2 ×1 |
| 3 mm pin stock | steel shaft, cut to length | Grobotronics: Precision Shaft - D3mm (50/100/200 mm), €0.65 (50 mm) / 1.30 (100 mm) | Not stainless; stainless 1/8 in alternative: link | ατσάλινος άξονας 3 mm | 15 ×1 |
| 4 mm pin stock | steel shaft, cut to 8 and 14 mm pins | Grobotronics: Precision Shaft - D4mm (50/100/200 mm), €0.65 (50 mm) / 1.30 (100 mm) · or mbo Oßwald: ISO 2338 dowel pin 4 × 16 mm, stainless 1.4305 [DE] | Grobotronics: Chrome-plated hardened steel, not stainless. mbo Oßwald: Stainless instead of plated steel; cut to 14 mm for the link pin. No price shown, and the shop may be for businesses. | ατσάλινος άξονας 4 mm | 7 ×3, 8 ×3, 14 ×3 |
| 5 mm rod | 300 mm, for the two multi-point rods | Grobotronics: Precision Shaft - D5mm (300 mm) (per piece), €3.90 | Hardened chrome-plated steel, not stainless. | ατσάλινος άξονας 5 mm | 11 ×2 |
| 3 mm stainless wire | bendable; spring temper is better | Gutekunst: Spring wire bar, 1.4310 stainless, 3 mm × 1000 mm [DE] (1), €15.25 · or Grobotronics: Shaft - Solid (Stainless; 1/8"D x 10"L) (per piece), €1.60 | Gutekunst: Spring-temper stainless, straight. €6.73 each from 5. Greek wire makers only sell 304 in coils. Grobotronics: 3.175 × 254 mm stainless rod, probably not spring temper. | σύρμα inox 3 mm (ελατηρίου) | 18 ×2 |
| Disc springs for M5 | DIN 2093, 10 × 5.2 mm, stainless | RVS Edelstahl: DIN 2093 disc springs 10 × 5.2 × 0.4 mm, stainless 1.4310 [DE] (200), €6.17 · or RVS Edelstahl: DIN 2093 disc springs 10 × 5.2 × 0.5 mm, stainless 1.4310 [DE] (200), €6.46 | RVS Edelstahl: The 0.4 mm springs the assembly guides assume; 200 is enough for every latch. Free shipping over €100. RVS Edelstahl: The 0.5 mm ones: stiffer, with a little less travel. | δισκοειδές ελατήριο (ροδέλα Belleville) DIN 2093 10x5.2 inox | 2 ×4, 3 ×4 |
| Disc springs for M3 | DIN 2093, 8 × 3.2 mm, stainless | RVS Edelstahl: DIN 2093 disc springs 8 × 3.2 × 0.5 mm, stainless 1.4310 [DE] (200), €8.46 · or BefestigungsFuchs: DIN 2093 disc spring 8 × 3.2 × 0.4 mm, spring steel [DE] (1, or larger packs) | RVS Edelstahl: Stainless, but 0.5 mm thick: stiffer than the 0.3 or 0.4 mm springs the latch is drawn for. The shop's 0.3 and 0.4 mm pages are gone. BefestigungsFuchs: The right size, but plain spring steel, so it will rust outdoors. The price didn't load. | δισκοειδές ελατήριο (ροδέλα Belleville) DIN 2093 8x3.2 inox | 5 ×5 |
| Compression spring | ISO 10243 die spring for a 12.5 mm hole, 25 mm long, yellow (extra heavy, about 58 N/mm) | Berner & Straller: ISO 10243 die spring, extra heavy (yellow), 12.5 × 25 mm [DE] (1), €3.51 + VAT | The spring the carriage is drawn for: about 58 N/mm with 6.3 mm of travel at most (the figures for the same ISO size from another maker). The red version is softer and would clamp with less force. | ελατήριο μήτρας ISO 10243 κίτρινο 12.5x25 mm | 8 ×1 |
| O-ring kit | NBR assortment: a small one that grips the captive M3 screw, and 10 × 2 mm for the multi-point shaft | Grobotronics: O-ring NBR Assortment Kit Black - 225pcs (225 pcs, 18 sizes), €7.90 | 18 sizes from 3 × 1 to 22 × 2 mm, including 10 × 2 (5 pieces). | σετ O-ring NBR | 5 ×1, 11 ×1 |
| 2 mm stainless strip | 304, 15–20 mm wide, for the small pawls | Edelstahl-Lechner: Flat bar 20 × 2 mm, 1.4301 (304) [DE] (cut to length, from 250 mm) · or Inox Store: Stainless A2 flat plate, 100 × 20 mm (1), €4.00 | Edelstahl-Lechner: Pick the 250 mm length; the €28.08 shown is for a longer default length. 5–8 days. Inox Store: In stock. 2.5 mm thick, not 2 mm, and it may have screw holes: check the pawl still fits under the keeper before cutting. | λάμα inox 304 20x2 mm | 6 ×1, 10 ×1 |
| Butterfly latch | stainless, about 22 mm wide | Amazon.de: Butterfly twist latches with brackets, 304 stainless [DE] (6, with 24 screws), €24.34 · or PRIOstahl: Small draw latch, V2A stainless, 55 mm [DE] (1), €2.35 · or Hellenic Blue: Osculati stainless snap latch, 64 × 29 mm (1), €5.17 | Amazon.de: 49 × 38 mm, about twice the 22 mm the printed hinge bracket is drawn for, so widen its ear gap and bore to suit. Free delivery to Greece. PRIOstahl: A toggle (draw) latch, not a butterfly latch. Hellenic Blue: Greek marine shop. A snap latch, not a butterfly or toggle latch, and the grade (304 or 316) isn't given. | κλείστρο πεταλούδα inox | 15 ×1 |
| Band clamp | stainless, about 120 mm; a T-bolt clamp with a spring if you can get one | Inox Store: NORMA heavy-duty clamp, W4 stainless, 112–121 mm (1), €13.00 · or Amazon.de: T-bolt clamp, 304 stainless, 110–120 mm [DE] (1), €11.04 · or Mouser: Molex 73430-0174 Stainless Steel Hose Clamp 3"-5" (1), €2.76 | Inox Store: In stock. A 25 mm band; the page doesn't say it is a T-bolt clamp, and it has no spring. Amazon.de: The right type, without the spring, but Amazon wouldn't send it to a Greek address. Use it to know what to ask for. Mouser: Stainless worm-drive, 76-127 mm; not a T-bolt or constant-tension clamp. | σφιγκτήρας T-bolt inox με ελατήριο 120 mm | 1 ×1 |
| Spring plunger (optional) | M4, stainless | Leschhorn: Ganter GN 615 ball spring plunger, M4, stainless [DE] (1), €2.40 + VAT · or Würth Hellas: Ball spring plunger, stainless | Leschhorn: Normal spring force, slotted. The shop looks aimed at businesses. Würth Hellas: Trade customers only: log in, or ask at a Würth branch for the price. The sizes didn't show, so check M4 is there. | ελατηριωτό έμβολο με μπίλια M4 inox | 9 ×1, 12 ×1, 13 ×1, 16 ×1 |
| PTFE washer (optional) | PTFE or PE, 1–2 mm thick | S-Polytec: PTFE sheet, cut to size [DE] (cut to size, 1–20 mm thick), €57.82 per m² · or Technische Kunststoffe 24: PTFE discs, cut to size [DE] (1–10 mm thick, from 20 mm across) · or KMMB: PTFE sheet (600 × 600 mm and up) | S-Polytec: Order a small 1 or 2 mm piece and cut the washers yourself with a knife and a hole punch. Technische Kunststoffe 24: Ready-cut 1 or 2 mm discs, but there is a €30 cutting fee per order and no centre hole is mentioned. KMMB: Greek industrial supplier in Piraeus, price on request. Sheets start at 2.5 mm thick. | ροδέλα τεφλόν (PTFE) | 9 ×1, 13 ×1 |
Numbers in the last column are force ranks (mechanism pages), with the quantity per latch.