ABBREVIATIONS AND SYMBOLS USED IN THIS MANUAL

INTRODUCTION

9

INFORMATION

ABBREVIATIONS AND SYMBOLS USED IN THIS
MANUAL

Across flats (bolt size)

AF

............................................

After bottom dead centre

ABDC

...................................

After top dead centre

ATDC

.........................................

Alternating current

a.c.

.................................................

Ampere

amp

................................................................

Ampere hour

amp hr

....................................................

Before bottom dead centre

BBDC

................................

Before top dead centre

BTDC

......................................

Bottom dead centre

BDC

.............................................

Brake horse power

bhp

................................................

British Standards

BS

....................................................

Carbon monoxide

CO

..................................................

Centimetre

cm

.............................................................

Centigrade (Celsius)

C

................................................

Cubic centimetre

cm

3

...................................................

Cubic inch

in

3

...............................................................

Degree (angle)

deg or

°

...............................................

Degree (temperature)

deg or

°

.....................................

Diameter

dia.

...............................................................

Direct current

d.c.

.........................................................

Electronic Control Unit

ECU

........................................

Fahrenheit

F

.................................................................

Feet

ft

...........................................................................

Feet per minute

ft/min

..................................................

Fifth

5th

........................................................................

First

1st

........................................................................

Fluid ounce

fl oz

..........................................................

Foot pounds (torque)

lbf ft

............................................

Fourth

4th

.....................................................................

Gramme (force)

gf

........................................................

Gramme (mass)

g

........................................................

Gallons

gal

...................................................................

High tension (electrical)

H.T.

........................................

Internal diameter

I.D.

...................................................

Inches of mercury

in. Hg

..............................................

Inches

in

......................................................................

Kilogramme (force)

kgf

.................................................

Kilogramme (mass.)

kg

................................................

Kilogramme centimetre (torque)

kgf.cm

.......................

Kilogramme per square millimetre

kgf/mm

2

.................

Kilogramme per square centimetre

kgf/cm

2

.................

Kilogramme metres (torque)

kgf.m

..............................

Kilometres

km

..............................................................

Kilometres per hour

km/h

.............................................

Kilovolts

kV

...................................................................

Left-hand

LH

................................................................

Left-hand steering

LHStg

.............................................

Left-hand thread

LHThd

...............................................

Litres

litre

.....................................................................

Low tension

l.t.

.............................................................

Maximum

max.

............................................................

Metre

m

........................................................................

Millilitre

ml

....................................................................

Millimetre

mm

...............................................................

Miles per gallon

mpg

....................................................

Miles per hour

mph

......................................................

Minute (angle)

’

............................................................

Minus (of tolerance)

-

...................................................

Negative (electrical)

-

...................................................

Newton metres (torque)

Nm

........................................

Number

No.

.................................................................

Ohms

ohm

...................................................................

Ounces (force)

ozf

.......................................................

Ounces (mass)

oz

........................................................

Ounce inch (torque)

ozf.in.

..........................................

Outside diameter

O.D.

.................................................

Part number

Part No.

...................................................

Percentage

%

...............................................................

Pints

pt

.........................................................................

Plus (tolerance)

+

.........................................................

Positive (electrical)

+

....................................................

Pound (force)

lbf

..........................................................

Pounds inch (torque)

in.lbf.

..........................................

Pound (mass)

lb

...........................................................

Pounds per square inch

P.S.I.

.....................................

Ratio

:

...........................................................................

Reference

ref.

..............................................................

Revolution per minute

rev/min

.....................................

Right-hand

RH

.............................................................

Second (angle)

"

...........................................................

Second (numerical order)

2nd

......................................

Specific gravity

sp.gr.

...................................................

Square centimetres

cm

2

...............................................

Square inches

in

2

.........................................................

Standard wire gauge

s.w.g.

.........................................

Synchroniser/Synchromesh

synchro.

..........................

Third

3rd

.......................................................................

Top dead centre

TDC

..................................................

United Kingdom

UK

......................................................

Vehicle Identification Number

VIN

...............................

Volts

V

.........................................................................

Watts

W

.......................................................................

SCREW THREADS
British Standard Pipe

BSP

...........................................

Unified Coarse

UNC

....................................................

Unified Fine

UNF

.........................................................