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Featuring Metallic Dome Head & Hex Head Stopping Plugs


Product Description

“SPMH & SPHH” Series Certified Metallic Stopping (Blanking) Plugs provide a method of sealing unused entries in Ex equipment. They maintain Ex d, Ex e, Ex tb and Ex nR methods of protection and IP66, IP68 for IEC type applications. They are Class I Division 1, Class II Division 1, Class II and Class 1 Zone 1 approved for for NEC and CEC type applications whilst also maintain Type 4X rating.


Compliance Standards:

EN 60079-0, EN 60079-1, EN 60079-7, EN 60079-15, EN 60079-31 IEC 60079-0, IEC 60079-1, IEC 60079-7, IEC 60079-15, IEC 60079-31 & IEC 60529 C22.2 (see certificate), UL514B, UL1203, ANSI/UL 60079-0/1/7, ISA 60079-31, UL 50E  


ATEX I M2 II 2GD Exd I Mb / Ex d IIC Gb / Exe I Mb / Ex e IIC Gb / Ex tb IIIC Db II 3G Ex nR IIC Gc
IECEx Ex d I Mb / Ex d IIC Gb / Exe I Mb / Ex e IIC Gb / Ex tb IIIC Db / Ex nR IIC Gc
CEC – Canada Class I Zone 1 Ex d IIC / Ex e IIC / Class II Zone 21 Ex tb IIIC Class I Division 1, Groups A, B, C & D Class II Division 1, Groups E, F & G Class III, Enclosure Type 4X
NEC – USA Class I Zone 1 AEx d IIC Gb / AEx e IIC Gb / Class II Zone 21 AEx tb IIIC Db Class I Division 1, Groups A, B, C & D Class II Division 1, Groups E, F & G Class III, Enclosure Type 4X
EAC Exd IU / Exd IICU / Exe IU / Exe IIU / ExnR IIU
INMETRO – Brazil Ex d I Mb / Ex d IIC Gb / Exe I Mb / Ex e IIC Gb / Ex tb IIIC Db / Ex nR IIC Gc
SAC – China Ex d IIC / Ex e IIC
UKRAINE Exd IU / Exd IICU / Exe IU / Exe IIU
CCoE – India Ex d IIC Gb / Ex e IIC Gc
ABS Specified ABS Rules
LLOYD’S Enclosure Systems (Part 1B)
RMRS Part XI of Rules for sea-going ships (ed.2014)


Certification numbers:

IECEx IECEx SIR 09.0131X
CEC – Canada CSA 2310046
NEC – USA CSA 2310046
EAC RU C-GB.ГБ06.В.00098
INMETRO – Brazil NCC 13.2189 X
SAC – China NEPSI GYJ16.1406X
UKRAINE UA.TR.047.C.0408-13 & 2937
CCoE – India PESO P365300/7 & P365300/12
ABS 14-LD1183401-PDA
LLOYD’S 10/00056(E1)
RMRS 14.02755.315




SP Stopping (Blanking) Plug
MH Dome (Mushroom) Head (MH) / Hex Head (HH)
1 No IP O-ring(0) – Nitrile (1) – Silicone (3)
B Brass (B) – Stainless Steel (S) – Aluminium (A)
F Ex d & Ex e certification including Marine Approvals
NP Nickel Plated
M20 Male Thread


Optional Accessories:

IP Washers – (N) Nylon (ACNSW) / (V) Fibre (ACFSW) / (H) PTFE (ACPSW)
(T) Earth Tag – Brass (ACBET) / St-Steel (ACSET) / Aluminium (ACAET)
(L) Locknut – Brass (ACBLN) / St-Steel (ACSLN) / Aluminium (ACALN)
(S) Serrated Washer – Stainless Steel (ACSSW)


IP RATING: IP66 & IP68 (100 metres for 7 days) & NEMA 4X
OPERATING TEMPERATURE O-ring – None -100°C to +400°C
  O-ring – Nitrile -30°C to +100°C
  O-ring – Silicone -60°C to +200°C
MATERIALS Brass, Stainless Steel or Aluminium
PLATING Electroless Nickel


Male threads are manufactured in accordance with:-

• ISO Metric threads to ISO 965-1, ISO 965-3, BS3643 and IEC 60423 • NPT and NPS threads are in accordance to ANSI B1.20.1 • PG threads to DIN40430 • ET threads to Imperial Conduit BS31 • ISO Pipe Parallel to ISO 228 and BS2779 (BSPP, G, R, PF & Tpy 6) • ISO Pipe Taper to ISO 7-1 and BS21 (BSPT, Gc, Gk, Rk, PT & Kmpy 6)  

SPHH & SPMH Dimensional Data

  • All dimensions in mm/ weight in kgs
  • Head Diameter=Minimum 5.5mm larger than the major thread diameter


• Assembly instructions must be read prior to installation and adhered to in full. • For Ex d applications female threads must comply with clause 5.3 of IEC 60079-1. • For Ex nR applications parallel entry threads must be installed with a suitable entry thread seal. • ATEX / IECEx versions are supplied as standard. • Additional approvals must be requested at time of order. • Where applicable, the standard O-ring material is nitrile. Other options are available upon request. • Aluminium versions are not suitable for Group I Mining applications.

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