Speco Thomas for Automotive Products
National Auto Parts Depot are now the proud owners of the Speco brand. Effective 1st April 2026 we are processing and shipping orders from the Moorabbin location. For orders call: (03) 9357 6100 or email: sales@naparts.com.au . Home Page

Speco Meter logo
Adaptors and Accessories
On this page:
Pyrometer complete thermocouple assembly Pyrometer Adaptor Assembly Pyrometer bulb assembly
PYROMETER COMPLETE THERMOCOUPLE ASSEMBLY
525-01
silver braided wire with probe
PYROMETER COMPLETE ADAPTOR ASSEMBLY
525-02
PYROMETER COMPLETE BULB ASSEMBLY
525-03
Adaptor Assortment Oil Pressure Adaptor  
ADAPTOR ASSORTMENT KIT
542-00
Kit comprising all popular adaptors (see our catalogue for sizes)
OIL PRESSURE GAUGE ADAPTOR FOR CHEVY LS1 AND LS2 ENGINES
545LS-BLU, 545LS-SIL
and 545LS-BLK

(connect an electrical oil pressure gauge and original oil pressure switch—needed for the standard computer)
  • swivel Banjo design
  • fits engines with M16 x 1.5mm
 
542-21, 542-22 and 542-23 adaptors 543-31, 543-32, 543-33 and 543-34 adaptors 543-41, 543-42, 543-43 and 543-44 adaptors
ADAPTORS FOR ELECTRICAL OIL PRESSURE GAUGES
542-21:
1/8" NPT x M14–1.5.
542-22:
1/8" NPT x M16–1.5.
542-23:
1/8" NPT x M18–1.5.
542-24:
1/8" NPT x M12–1.5.
542-25:
1/8" NPT x 1/4" NPT.
ADAPTORS FOR ELECTRICAL WATER TEMPERATURE GAUGES 543-31:
1/8" NPT x 1/8" BSP.
543-32:
1/8" NPT x 3/8" NPT.
543-33:
1/8" NPT x 1/2" NPT.
543-34:
1/8" NPT x 5/8" UNF.
ADAPTORS FOR MECHANICAL WATER TEMPERATURE GAUGES 544-41:
5/8" UNF x M16–1.5.
544-42:
5/8" UNF x M18–1.5.
544-43:
5/8" UNF x 1/2" NPT Holden/Chev.
544-44:
5/8" UNF x 3/8" NPT Ford and Chrysler V8.
544-45:
5/8" UNF x 5/8" UNF fitted with O-ring seal.

545-20 sender 545-30 sender 545-40 sender
545-20:
oil pressure (electrical) sender.
1/8" NPT
545-30:
temperature (electrical) sender.
1/8" NPT
545-40:
Fuel level (electrical) sender (adjustable) for
523-06/524-06/535-06/
537-06 gauges.
Top mount only.
546-40 pressure gauge fitting kit 546-60 pressure gauge fitting kit 546-60 pressure gauge fitting kit
PRESSURE GAUGE FITTING KITS
546-40
:
6' nylon line boost gauge.
546-50:
6' nylon line
oil pressure gauge.
546-55:
12' nylon line
oil pressure gauge.
PRESSURE GAUGE FITTING KITS
546-60
:
6' copper line
oil pressure gauge.
546-65:
12' copper line
oil pressure gauge.
BRAIDED LINE
KITS
546-70
:
3', suits mechanical pressure gauges, with 1/8" NPT thread.
546-71:
5', suits mechanical pressure gauges, with 1/8" NPT thread.
NOTE: will not fit 2" gauges (5/16" thread)
547-60 electric oil pressure gauge T-pieces brass 547-03 radiator hose water temperature adaptors (mechanical gauges) 547-12 radiator hose water temperature adaptors (electric gauges)
ELECTRIC OIL PRESSURE
T-PIECES (BRASS)

547-60:
1/8" NPT (A) x 1/8" NPT (B)
x 1/8" NPT (C)
547-61:
1/4" NPT (A) x 1/4" NPT (B)
x 1/8" NPT (C)
547-62:
1/8" BSP (A) x 1/8" BSP (B)
x 1/8" NPT (C)
547-63
(for Commodores):
5/8" UNF x 5/8" UNF
x 1/8" NPT
RADIATOR HOSE WATER TEMPERATURE ADAPTORS
for mechanical water temperature gauges


547-03: 32 mm I.D.
547-04: 34 mm I.D.
547-05: 36 mm I.D.
547-06: 38 mm I.D.
547-07: 40 mm I.D.
RADIATOR HOSE WATER TEMPERATURE ADAPTORS
for electric water temperature gauges


547-12: 32 mm I.D.
547-13: 34 mm I.D.
547-14: 36 mm I.D.
547-15: 38 mm I.D.
547-16: 40 mm I.D.
547-20 radiator hose electric fan adaptors 547-50 oil pressure and oil temperature adaptor 548-00 chrome clip on bezel
RADIATOR HOSE ELECTRIC FAN ADAPTORS
with 16mm x 1.5 threaded fitting

547-20:
Suits hose with 36mm I.D.
547-21:
Suits hose with 38mm I.D.
OIL PRESSURE
AND OIL TEMPERATURE ADAPTORS

Oil filter mount. Suitable only for electrical gauges.

547-49:
13/16"–16 oil filter thread. Suits V8 Commodore, VN onwards, with 2 3/4" o-ring.
547-50:
3/4"–16 oil filter thread. Suits most Ford, Toyota, Nissan.
547-51:
18–1.5 mm oil filter thread. Suits V6 Commodore, VN onwards.
547-52:
20–1.5 mm oil filter thread. Suits most Mazda, Mitsubishi, Honda etc.
547-53:
22–1.5 mm oil filter thread. Suits Ford V8, BA onwards.
548-00:
2" chrome clip on bezel.
548-01 chrome clip on bezel 550-01 light bulb 14mm 550-02 light bulb 7mm
548-01:
2 5/8" chrome clip on bezel.
550-01:
GLOBE ASSEMBLY
14mm, 2" mechanical and
all 2 5/8" gauges.
550-04
14 mm assembly 24 volt for 2" mech and all 2 5/8" gauges.
550-02:
GLOBE ASSEMBLY
7mm, 2" electrical gauges.
550-05 globe assembly 2 5/8 inch tachos 12V 550-06 light bulb 7mm  
550-05:
GLOBE ASSEMBLY
2 5/8" globe assembly tachos 12V.
550-06:
GLOBE ASSEMBLY
for 85 mm speedos and tachos.
 
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