



Adaptaflex AR21/M20/A/BL Adaptaring Black Nylon Type A Straight Fitting With Fixed External Thread & Locknut IP40 M20 21mm
AR21/M20/A/BL
Range Options
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AR21/M20/A/BL | 21mm Dia, Fixed, IP40 | £3.10 £2.58 |
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AR28/M25/A/BL | 28mm Dia, Fixed, IP40 | £4.05 £3.38 |
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Adaptaflex AR21/M20/A/BL Adaptaring Straight Fitting – IP40 Rated, Black Nylon with Fixed M20 Thread & Locknut
The Adaptaflex AR21/M20/A/BL Adaptaring is a Type A straight fitting designed for non-metallic conduit systems, combining strength, flexibility, and ease of installation. Featuring a fixed M20 external thread and locknut, it includes a nitrile O-ring housed in a protective groove for effective sealing in threaded entries and knockouts.
- Complete Assembly: Includes adaptor body, compression cap-nut, and swivel C-ring for fast, secure installation.
- Nylon & Acetal Construction: Made from tough Polyamide 66 and Acetal for excellent mechanical durability.
- Fixed Thread with Seal: M20 threaded connection with retained nitrile rubber O-ring for secure fit and alignment.
- Lightweight & Corrosion-Resistant: Non-metallic materials eliminate rust and reduce installation weight.
- Quick to Fit: Easy to cut and assemble—ideal for use across various electrical systems.
Technical Specification
- Thread Size: M20
- Conduit Size: 21mm (Type A)
- Material: Polyamide (Nylon) 66 & Acetal (POM)
- Fitting Type: Straight with fixed external thread
- Ingress Protection: IP40
✅ Install the Adaptaflex AR21/M20/A/BL for quick, corrosion-free conduit terminations with reliable sealing performance!

Ean Code | 5020963011009 |
Range | Adaptaflex Adaptaring |
Thread Standard | Male |
Flameproof Rating | Self-extinguishing |
Product | Flexible Conduit Connectors |
Type | Fixed |
Ingress Protection | IP40 |
Colour | Black |
Diameter | 21 mm |
Length | 39.2 mm |
Unit Weight | 0.013605 kg |
Material | Nylon |
Standards | BSI Kitemark KM-35161 BS EN 61386-1 & 23 NFF16-101 I4 F2 ISO 4589-2 BS EN 60695-2-11 UL94 V2 BS EN IEC 61386-1:2008 BS EN IEC 61386-23:2004+A11:2010 EN60423 BS3643 |
Qualifier | Type A for Type PA/CP/PR/PF |
Ce Approved | Y |
Fixings Included | N |
Nominal Width | 21 mm |
Nominal Width B | 20 mm |
Fixing Type | Screw Fix |
Angle | Straight |
Normal Operating Minimum Temperature | Static -40/Moving -5 Degrees C |
Normal Operating Maximum Temperature | Static 120/Moving 120 Degrees C |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.