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373197183-Engineers-Black-Bok-2nd-Edition.pdf
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Common Conversion Fucłors 'V i “ V ENGINEERST 0i?43P
For defailed Conversion Facfors,
refer pages 4 & 5
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A 7 L' llala Sheels I Formulae 1
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Common Conversnon Fuciors E
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ENGINEERS $ 1243?
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- 1
2"” EDITION
“ llala $|lBBl$ I E0l'lllll|flB
~ -E BBIBIBHBB Tfl|I|BS I Elllll|€l|BIII c|Ifll'lS
.. A
‘ _ Y
IVIETRIC ‘IO IMPERIAL
O 6836? "W" “ _._.__..1.
kg;
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For defculed Converslon Factors, BEN
E6 ikfl% E‘?l_u1
~_Ji—*
E E E ____1
_
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refer pages 4 & 5
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Comp/led by PM R/4+
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9. ,fli Aesnevuirions (sYMBoLs)
USED FCR STANDARD THREADS
Symbol Reference
ACME-G
Aiviü
ANPT
BA
BSB
BSCy
BS CON
BSF
BS GAS
BSPP
BSPT
BSW
M
ME
MF
N
N BUTI'
NC
NEF
NF
NGO
NGS
NGT
NPT
NPTF
NPTR
NPS
NPSC
NPSF
NPSH
NPSI
NPSL
NPSM
NS
PG
SB
SGT
STI
TR
UN
UNC
UNEF
UNF
UNJ
UNM
UNR
UNS
.¡
WHIT
Acme Thread - General Purpose
American Standard ivlicroscope Goiective Thread
Aeronautical National Pipe Taper Thread
British Association Standard Thread
British Standard Brass (26 tpi) Thread
British Standard Cycle Thread
British Standard Conduit Thread
British Standard Fine Thread
British Standard Gas Thread
British Standard Pipe Parallel Thread
British Standard Plpe Taper Thread
British Standard Whitworth (Coarse) Thread
ISO Metrio (Coarse Pitch) Thread
Model Engineers Thread
ISO Metric (Fine Pitch) Thread
National 8. 12 and 16 Thread Series (BN, 12N, 16N)
National Buttress Thread
National Coarse Thread Series
National Extra-Fine Thread Series
National Fine Thread Series
National Gas Outlet Thread (specify right or left hand)
National Gas Straight Thread
National Gas Taper Thread (See also “SGT”)
National Hose (Garden & Fire Hose Coupling) Thread
National Plpe Taper Thread
National Pipe Taper Fuel (Fuel 81 Oil) Thread
National Pipe TaperRai1ing (Railing Joints) Thread
National Pipe Straight Thread
National Plpe Straight Coupling (Pipe Couplings) Thread
National Plpe Straight Fuel (Fuel & Oil) Thread
National Plpe Straight Hose (Hose Couplings) Thread
National Plpe Straight lntermediate Thread
National Pipe Straight Lock (Lock Nut) Thread
National Pipe Straight Mechanical Thread
National Special Thread
Panzerrohr-Gewinde (Steel Conduít Thread)
Stove Bolt Standard Thread
Special Gas Taper Thread
Special Thread insert (tor Hellcal Coil Wire Screw Thread lnserts)
STUB ACME 1 Stub Acme Thread
Trapezoldal Thread
Unitied National (Gonstant-Pitch) Thread Series
Unified National Coarse Thread
Unified National Extra-Fine Thread Series
Unitied National Fine Thread
Unitied Nat. Thread Senes with a 0.15üipt0 1118040 Coniroiied Root Radius (external threads)
Unified National Miniature Thread Series
Unified National Round (round root) Thread with a 0.1082p to 0.1443p Controlled Root Radius
Unified National Special Thread
A 60° “V” Thread with Trunoated @rest and Root
Whitworth Form (Special) Thread
III
..-__ F.9Ĺ'!I'l°
USEIJ IN THI: ` '
ÉI
= :ri
-IEE
= rrl
ŠI'|'I
É
E!
u :::1
2 EE
:U 1::
Š
c:va EI-1:
r"_i
iiiiiiiiiiiiiiiil
iii.NIl>
`¡/2d2| " /1 B 1/20p|ay` nd I 71 B /¡1¡2dp¡ay^
pay 1/-(1 A 0.7157P 1/ Špzy 1711 _Ĺ 051579
P 4
0 P
./iii _ 15 „g
1.9334P O 5P 1 933411?
I 0 7167P
. . .S
. 1/2 dt play 0.5167P
1 1/2 "I "ay 1 1
BOLT A:0_3707P BOLT A=()_4224P
B:0_3]07p_0_25g x d p|ay B=U.42Ž4P-0.259 X d Diíty
C=0.37U7P-0.259 (01 þiãy-d2 play) C=0.4Ž24P-0.259 (di piay-CI2 play
ACME STUB ACME
Use : Acme-General is used in the Use : Stub Acme is used for motion
mechanical industry for motion transmission screws where
transmission screws normal Acme is too deep.
1 P P
„MZ 13 O-1532" 05275 U-2453? 010591"
0 1 - _
„__ , J„'”1"Ĺ'_'*y _ 1
1 ose 1 ^` É 2P 1
03" u 00 5059P
0.5905P1_ 10.55 0.5059P 2-P
"_1~)_ .. T _
m10.0525P måg5P|
1/ "ay 1/2015151 1/2020151
AMERICAN BUTT1 .1 ENGLIS.. ..
Use : Mechanical industry for motion Use : Mechanical industry for motion
transmission screws when the load transmission screws when the load
is acting from one direction, is acting from one direction,
e.g., in presses, rolling milis, etc. e.g., in presses, rolling milis, eto.
5
Kb
"J
___
_.
Eš
csN
az Q
"7 „_ E51<
151
(I
à
'
O
-I
rnin0 I: I 'ãizIninin
0.075P P P
0.1723P 0.1520P
ix to _i _ 4
0.5515P _
I 60° 1 60° o.4579P
_L 1/ Ĺ" Ä 055921-I
- Å
eotr
eotr gofi XT P90.. ífip
` TAPER 1:5 '
SD 'U
-l
3>'UrriZu 4$
.Q 'U
ms of Screw axis of screw
API : TAPER 1:4 (V-0.040” FLAT) API : TAPER_1:6 (V-0.038”R)
Use : Oil Industry Use: uii industry
lä
1
________ __ __ _ ______________ __i___a_______, 7 P
Ml ABBREVIATIONS (SYMBOLS) I
USEDFOR STANDARD THREADS
Symbol Reference
ACME-G
AMO
ANPT
BA
BSB
BSCy
BS CON
BSF
BS GAS
BSPP
BSPT
BSW
M
ME
|ii||= l
N
N BUTT
NC I
NEF
NF
NGO
NGS
NGT
NH
NPT
NPTF
NPTR
NPS
NPSC
NPSF
NPSH
NPSI
NPSL
NPSM
NS
PG
Acme Thread - General Pu ose Z
FD
American Standard Microscope Obiectlve Thread
Aeronautical National Pipe Taper Thread
British Association Standard Thread
British Standard Brass (26 tpi) Thread
British Standard Cycle Thread
British Standard Conduit Thread
British Standard Fine Thread
British Standard Gas Thread
British Standard Pipe Parallel Thread
British Standard Pipe Taper Thread
British Standard Whitworth (Coarse) Thread
ISO Metric (Coarse Pitch) Thread
Model Engineers Thread
ISO Metric (Fine Pitch) Thread
National S, 12 and 16 Thread Series (8N, 12ll, 16N)
National Buttress Thread
National Coarse Thread Series
National EXtra~Fine Thread Series
National Fine Thread Series
National Gas Outlet Thread (specify right or left hand)
National Gas Straight Thread
National Gas Taper Thread (See also “SGT“)
llatioiial Hose (Garden 8! Fire Hose Coupling) Thread
National Pipe Taper Thread
National Pipe Taper Fuel (Fuel & Oil) Thread
National Pipe Taper Railing (Railing Joints) Thread
National Pipe Straight Thread
National Pipe Straight Coupling (Pipe Couplings) Thread
National Pipe Straight Fuel (Fuel & Oil) Thread
National Pipe Straight Hose (Hose Couplings) Thread
National Pipe Straight Intermediate Thread
National Pipe Straight Lock (Lock Nut) Thread
National Pipe Straight Mechanical Thread
National Special Thread
Panzerrohr-Gewlnde (Steel Conduit Thread)
SB Stove Bolt Standard Thread
STI
Special Gas Taper Thread
Special Thread lnsert (tor Helical Coil Wire Screw Thread inserts)
STUB ACME i Stub Acme Thread
TR
UN
UNC
UNEF
UNF
UNJ
UNM
UNR
UNS
j Trapezoidal Thread
Unified National (Constant-Pitch) Thread Series
Unified National Coarse Thread
Unified National Extra-Fine Thread Series
Unified National Fine Thread
Unified Nat. Thread Series with a 0.1501 p to O.T3U4p Controlled Root Radius (external threads)
Unified National Miniature Thread Series
Unified National Round (round root) Thread with a O.1l]82p to O.l443p Controlled Root Radius
Unified National Special Thread
I A SC Thread with Truncated Crest and Root.
U 1 . . °
WHIT § wnirweiiii Form (Special) Thread
W
Hllflllllllllflllllllfllillfl
- . r. -' - r ..1 1/_: 1 9 ; ;.' -j- :-,_-_. _-- _. ;;. .- L-_ -,3
COMMON THREAD FORMS
‘ USED IN THE ENGINEERING INDUSTRY
(1/2e2piay‘|,i“~(e A 1/2°i"ay orieri-=‘ (1/2 e2 play [,~’}|eA
l.9334P O.5P l.9334P
A A C '
I J L I V I
arm ,i*i
at
I A=0.3707P BOLT A=g,4g24|=>
a=o.aro7P~o.25s X [I play ( B=@-4224P-9-259 X A PW
C=D.3707P-0.259 (dt play-d2 play) 0=0-4224P~0-259 (ill rilflii-d2i1lavl
ACME STUB ACME
Use : Acme-General is used in the Use : Stub Acme is used for motion
mechanical industry for motion transmission screws where
‘ transmission screws normal Acme is too deep ‘
_4. ‘-
c
*3—i‘ID
"
2
i '5=1‘.
C) '-'r:iD‘) onre-ci
t
P
‘ O 2453P E
O.6_27P - lm _ _‘ 0lD59P
L ‘ *fI/éilfldy +
-—--
I i /7=i 45°
|0.0826P ~l I-/»l
:=-ii l“l'l E!4:1:=-:: cu1:: -|-I:u
‘ 1 2p
-_-
@%§é§»PL( _ 0.5%)59P o5o5sP
_C3
_.L co
If
0.:I3
I'J G.
TI N_ ‘ED3*<
-Q-
A-___--_ ‘l r" 4b“
H2 d1 may o.1aesP| /I "r-I P//
' ‘ i/2 d1 play 1/2 <12 play
BOLT
IIQQ
l-nu a- :2onE:on:|: ID‘EEuI"l'lan
Use : Mechanical industry for motion Use : Mechanical industry for motion
transmission screws when the load transmission screws when the load
is acting from one direction, is acting from one direction,
e.g., in presses, rolling mills, etc. e.g., in presses, rolling mills etc
2:c: -4
U.O75P , P P
I .~| I i.O1.€~ . 1.65
“"- O.1723P U152UP
I _ I In O5tI92P 600 873°
lkjd
-i
11> 'U I'I"'I :io -L .15
_ Q 90°
eotr L
- 90 I
I’ I
axis of Screw T axis of screw
API : TAPER 1:4 Q!)-0.040” FLAT) API :TAPER 1:5 (V O O38”R]
Use : Oil Industry T Use: Oil industry
i
Po
L‘
ca. "ca at’ 0 8167P
F'1—
I _L.
I3
TAPER 1 6 0 06p