Threading Tables. Chart No 1 - Whitworth Threads. Whitworth Form Threads (55 Deg Thread Angle) Dimensions in Inches except where stated.

Transcription

1 Threading Tables C:\British Cars\Tech Papers\Thread Sizes\Threading Tables.doc Source: Chart No 1 - Whitworth Threads Whitworth Form Threads (55 Deg Thread Angle) Thread Form Data Tapping Drill Clearance Drill Diameter O/Diameter Core Pitch Depth Radius Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac 1/8" mm mm 3/16" mm mm 1/4" mm mm 5/16" mm mm 3/8" /16" mm 7/16" mm /64" 1/2" mm /64" 9/16" mm /64" 5/8" mm /64" 3/4" /64" /64" 7/8" mm /64" 1" mm /64" 1-1/8" mm /64" 1-1/4" /32" /64" 1-1/2" mm /64" 1-3/4" mm /64" 2" ½ mm /64" 1

2 Chart No 2 - British Standard Fine (BSF) Threads British Standard Fine Threads (55 Deg Thread Angle) Diameter O/Diameter Core Pitch Depth Radius Thread Form Data Tapping Drill Clearance Drill Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac 3/16" /32" mm 7/32" mm mm 1/4" mm mm 5/16" mm mm 3/8" mm mm 7/16" mm /64" 1/2" /16" /64" 9/16" /2" /64" 5/8" mm /64" 3/4" mm /64" 7/8" /32" /64" 1" mm /64" 1-1/8" mm /64" 1-1/4" /64" 1-3/8" /64" 1-1/2" /64" /64" 1-5/8" /64" /4" /32" -- 2" /32" /4" /16" /2" /16" /4" /16" -- 3" /4" -- 2

3 Chart No 3- British Association (BA) Threads Size O/Diameter Core Pitch Depth Radius British Association Threads Thread Form Data Tapping Drill Clearance Drill Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac 0BA mm mm 1BA mm mm 2BA mm mm 3BA mm mm 4BA mm mm 5BA mm mm 6BA mm mm 7BA mm mm 8BA mm mm 9BA mm mm 10BA mm mm 11BA mm mm 12BA mm mm Diameter O/Diameter Core Pitch Depth Radius Chart No 4 - British Standard Pipe Threads BSP Threads Thread Form Data Tapping Drill Clearance Drill Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac 1/8" mm mm 1/4" mm /32" 3/8" mm /64" 1/2" /4" /64" 5/8" /64" /32" 3/4" mm /64" 7/8" mm /64" 1" mm /16" 1-1/4" mm /32" 1-1/2" /32" /54" 1-3/4" mm /8" 2" /4" /64" 3

4 Chart No 5 - SI Metric Threads (60 Deg Angle) SI Metric Threads (60 Deg Angle) - Dimensions in Millimetres - Inch table below Thread Form Data Tapping Drill Clearance Drill Diameter O/Diameter Core Pitch Depth Flat Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac 6mm 6.00mm 4.70mm 1.00mm 0.650mm 0.125mm 5.350mm mm 6.10mm 7mm 7.00mm 5.70mm 1.00mm 0.650mm 0.125mm 6.350mm mm 9/32" 8mm 8.00mm 6.376mm 1.25mm 0.812mm 0.156mm 7.188mm /64" 8.20mm 9mm 9.00mm 7.376mm 1.25mm 0.812mm 0.156mm 8.188mm mm 23/64" 10mm 10.00mm 8.052mm 1.50mm 0.974mm 0.187mm 9.026mm mm 10.30mm 11mm 11.00mm 9.052mm 1.50mm 0.974mm 0.187mm mm mm 7/16" 12mm 12.00mm 9.726mm 1.75mm 1.137mm 0.219mm mm mm 31/64" 14mm 14.00mm mm 2.00mm 1.299mm 0.250mm mm mm 9/16" 16mm 16.00mm mm 2.00mm 1.299mm 0.250mm mm /64" 41/64" 18mm 18.00mm mm 2.50mm 1.624mm 0.312mm mm /64" 23/32" 20mm 20.00mm mm 2.50mm 1.624mm 0.312mm mm /16" 51/64" 22mm 22.00mm mm 2.50mm 1.624mm 0.312mm mm /64" 7/8" 24mm 24.00mm mm 3.00mm 1.949mm 0.375mm mm mm 61/64" 27mm 27.00mm mm 3.00mm 1.949mm 0.375mm mm mm 1-5/64" 30mm 30.00mm mm 3.50mm 2.273mm 0.438mm mm mm 1-3/16" 33mm 33.00mm mm 3.50mm 2.273mm 0.438mm mm mm 1-5/16" 36mm 36.00mm mm 4.00mm 2.598mm 0.500mm mm mm 1-27/64" 39mm 39.00mm mm 4.00mm 2.598mm 0.500mm mm mm 1-35/64" SI Metric Threads (60 Deg Angle) - Dimensions in Inches - Metric table above Thread Form Data Tapping Drill Clearance Drill Diameter O/Diameter Core Pitch Depth Flat Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac 6mm " " 7mm " " 8mm " " 9mm " 94" 10mm " " 11mm " " 12mm " " 14mm " " 16mm " " 18mm " " 20mm " " 22mm " " 24mm " " 27mm " " 30mm " " 33mm " " 36mm " ! 39mm " " 4

5 Chart No 7 - Cycle Engineer's Standard Threads Cycle Engineer's Standard Threads (60 Deg) Thread Form Data Diameter O/Diameter Core Radius Depth Pitch Effective Dia T.P.I Tapping Drill 17 IWG** No IWG /64" 15 IWG No IWG mm 13 IWG No IWG No 46 1/8" mm 0.154" No mm 3/16" /32" 1/4" No " No " mm 5/16" mm 3/8" mm 9/16" mm 1" mm 1.29" " 1.37" /64" 1-7/16" mm 1-1/2" mm **IWG = Imperial Wire Gauge Wire gauge sizes are for spokes, larger sizes for hubs and pedals 5

6 Chart No 8 - Model Engineer's and Admiralty Fine Threads Model Engineer's Standard Threads (Whitworth Form) Thread Form Data Diameter O/Diameter Core Radius Depth Pitch Effective Dia T.P.I Tapping Drill 1/8" No 40 5/32" No 30 3/16" /32" 7/32" /16" 1/4" /32" 9/32" Letter C 5/16" Letter J 3/8" Letter R 7/16" mm 1/2" /64" Component Diameter Admiralty Fine Threads (Whitworth Form) Thread Form Data O/Diameter Core Radius Depth Pitch Effective Dia T.P.I Tapping Drill Under 1/2" N/A N/A N/A N/A 24 N/A 1/2" & under 3/4" N/A N/A N/A N/A 20 N/A 3/4" & under 1" N/A N/A N/A N/A 14 N/A 1" & under 2" N/A N/A N/A N/A 12 N/A 2" & under 4" N/A N/A N/A N/A 8 N/A 4" & over N/A N/A N/A N/A 6 N/A Used on pressure gauges and screwed glands on engines etc. 6

7 Chart No 10 - Small Whitworth Threads Small Whitworth Form Threads (55 Deg Thread Angle) Thread Form Data Tapping Drill Diameter O/Diameter Core Pitch Depth Radius Effective Dia T.P.I Dec / Met / Frac 1/16" No 56 5/64" mm 3/32" No 48 7/64" No 44 1/8" No 40 9/64" No 33 5/32" No 31 11/64" No 29 3/16" No 28 13/64" /32" 7/32" /64" 15/64" /16" Chart No 6 - 'Continental' Whitworth Threads 'Continental' Whitworth Form Threads (55 Deg Thread Angle) Thread Form Data Diameter O/Diameter Core Pitch Depth Radius Effective Dia T.P.I 1/4" /16" /8" /2" /8" /4" /8" " /8" /4" /8" /2" /8" /4" " ½ 2-1/4" /2" " ½ 7

8 Chart No 12 - Copper Tube Threads Copper Tube Screw Threads (Whitworth Form 55 Deg Thread Angle) Thread Form Data Tapping Hole I/Diameter Gauge O/D Core Pitch Depth Radius Effective Dia T.P.I Dec / Met / Frac 1/8" Inside Number 4 1/4" Inside Letter Q 3/8" Inside /32" 1/2" Inside mm 5/8" Inside /32" 3/4" Inside /32" 7/8" Inside mm 1" Inside mm 1-1/4" Inside mm 1-1/2" Inside /64" 1-3/4" Inside /64" 2" Inside " 2-1/4" Inside /64" 2-1/2" Inside /8" 2-3/4" Inside /64" 3" Inside " Chart No 13 - Brass Pipe Threads Brass Pipe Screw Threads (Whitworth Form 55 Deg Thread Angle) Thread Form Data Tapping Hole Diameter O/D Core Pitch Depth Radius Effective Dia T.P.I Dec / Met / Frac 1/8" Number 47 1/4" Number 6 3/8" Letter Q 1/2" /64" 5/8" /64" 3/4" /64" 7/8" /64" 1" /64" 1-1/8" /64" 1-1/4" /64" 1-1/2" /64" 8

9 Chart No 14 - B.S. Electrical Conduit Threads Electrical Conduit Whitworth Form Threads (55 Deg Thread Angle) O/Diameter Core Pitch Depth Thread Form Data Tapping Drill Electrical Conduit Nut Sizes Effective Dia T.P.I Dec / Met / Frac Across Flats Acr. Corners Thickness 1/2" /16" 0.815" 0.950" 3/16" 5/8" /64" 0.915" 1.060" 3/16" 3/4" /16" 1.092" 1.270" 1/4" 1" /16" 1.472" 1.690" 1/4" 1-1/4" /16" 1.662" 2.040" 1/4" 1-1/2" /64" 2.040" 2.350" 5/16" 2" /64" 2.570" 2.960" 3/8" 2-1/2" /64" 3.150" 3.630" 3/8" Chart No 15 - British Standard Worm Threads This thread is similar in form the Acme Thread, in that the included angle is 29 degrees, but the depth of the thread is greater. The width of the flat at both p and botm are therefore different. The table below gives full machining details. T.P.I. Pitch Addendum Worm Threads (29 Deg Thread Angle) - NOT Acme Thread Depth below pitch line Thread Form Data Total Thread Depth Tooth Thickness at pitch line Top Thread Width Botm Thread Width ½ ½ ½ ½ NOTES:- Depth of Thread = X Pitch Width at Top of Thread = X Pitch Width of Space at Botm of Thread = X Pitch Width of Thread at Pitch Line = 0.5 X Pitch Addendum = X Pitch 9

10 Popular Thread Standard Forms Selection of Screw Thread Forms, UK, Europe & USA, these are the older 1940's standards. 10

11 Thread Comparison Tables Includes Older Thread Standards Thread System: See Notes at end of Table - This is Page 1 - Metric (Including BA) & Pipe are on Page 3 & 4 BSW BSF ADM Fine British Threads CEI Brass Conduit USS SAE Regular SAE Fine US Threads ASME No. ASME Standard ASME Special NC NF Form* A A A E A A B B B -- B B B B Angle Full Thread Dia frac/swg ins mm** Threads Per Inch Threads Per Inch /16" /64" /32" /64" / /8" / / /64" / /32" / /64" / /16" / /32" /64"

12 1/4" /32" /16" /8" /16" /2" /16" /8" /16" /4" /16" /8" /16" " * Thread Forms are shown in graphical format on a separate page (from the main menu or link below) The forms page is a slow download. ** This is a conversion from the given Inch measurement. The inch dimension has not been changed from the printed paper table. An occasional but increasing error is present between the Inch figure in the left hand cloumn and the mm dimension converted from the original Inch figure. 12

13 Thread Comparison Tables Includes Older Thread Standards Thread System: See Notes at end of Table - This is Page 2 - Metric (Including BA) & Pipe are on Page 3 & 4 BSW BSF ADM Fine British Threads CEI Brass Conduit USS SAE Regular SAE Fine US Threads ASME No. ASME Standard ASME Special NC NF Form* A A A E A A B B B -- B B B B Angle Full Thread Dia frac/swg ins mm** Threads Per Inch Threads Per Inch 1-1/8" /4" /8" /16" /2" /8" ½ /4" /8" ½ " ½ ½ /8" ½ /4" ½ ½ /8" /2" /8" /4" ½ /8" ½ " ½ ½ /8" ½ ½ /4" ¼ ½ /2" ¼ ¼ /8" ¼ /4" /8" " /8" /4" / /8" / /2" / ¾ /8" / /4" / /

14 4-7/8" / " / ½ /4" / /8" /2" / / * Thread Forms are shown in graphical format on a separate page (from the main menu or link below) The forms page is a slow download. ** This is a conversion from the given Inch measurement. The inch dimension has not been changed from the printed paper table. An occasional but increasing error is present between the Inch figure in the left hand cloumn and the mm dimension converted from the original Inch figure. 14

15 Thread Comparison Tables Includes Older Thread Standards Thread System: See Notes at end of Table - This is Page 3 - Imperial & US are on Page 1 & 2 BA No BA S.I. Metric Fine Metric Threads Swiss Std Swiss Fine S.I. DIN S.I. Fine Din Lowen- -hurz Pipe Size. Pipe Threads BSP Briggs Copper Form* C D D D D F F H -- A G A Angle 47½ ' Full Thread Dia mm ins mm** Pitch in mm Threads Per Inch /8"

16 /8" /4" /8" /8" /4" /4" /2" /8" /8" /8" /2" /2" /4" /8" * Thread Forms are shown in graphical format on a separate page (from the main menu or link below) The forms page is a slow download. ** This is a conversion from the given Inch measurement. The inch dimension has not been changed from the printed paper table. An occasional but increasing error is present between the Inch figure in the left hand cloumn and the mm dimension converted from the original Inch figure. 16

17 Thread System: Thread Comparison Tables Includes Older Thread Standards See Notes at end of Table - This is Page 3 - Imperial & US are on Page 1 & 2 BA No BA S.I. Metric Fine Metric Threads Swiss Std Swiss Fine S.I. DIN S.I. Fine Din Lowen- -hurz Pipe Size. Pipe Threads BSP Briggs Copper Form* C D D D D F F H -- A G A Angle 47½ ' Full Thread Dia mm ins mm** Pitch in mm Threads Per Inch /8" /4" /4" " /8" " -- 11½ " ¼" ¼" ¼" -- 11½ ½" ½" ½" -- 11½ ¾" ¾" " "

18 " -- 11½ ¼" ¼" ½" ½" ¾" ½" " ¾" ¼" " " ¼" ½" ½" ¾" ½" ¾" " " "

19 ½" ½" " * Thread Forms are shown in graphical format on a separate page (from the main menu or link below) The forms page is a slow download. ** This is a conversion from the given Inch measurement. The inch dimension has not been changed from the printed paper table. An occasional but increasing error is present between the Inch figure in the left hand cloumn and the mm dimension converted from the original Inch figure. 19

20 Spec BS970 En 1A En 1B En 2 b) En 2A En 2A/1 En 2B En 2C En 2D En 2E En 3 En 3A En 3C Equivalent Table Chemical Composition En / BS SAE - Page 1 of 20 En1A En 7 - Page 1 General Information C Si Mn Ni Cr Mo Va S P Type of Free Cutting Mild Free Cutting Mild G/Purp Forming Sp/Purp Forming Sp/Purp Forming Sp/Purp Forming Sp/Purp Forming Sp/Purp Forming Forming Fully Killed '20' '20' '20' Condition Rolled or Drawn Rolled or Drawn Rolled or Forged STCO c) STCO c) STCO c) As Rolled or Forged As Rolled or Forged As Rolled or Forged As Rolled or Forged As Rolled/ Normalised As Rolled/ Normalised Tensile Strength Tons / Sq In Min Mechanical Properties Yield Stress Tons / Sq In Min 0.2 Proof Tons / Sq In Min a) Elongation Min a) a) Izod Brinell No: Ft Lb Min Related Specifications BS SAE No:- No:- No: / / En 3B '20' / , /102 14,29 32/ / , /

21 En 3D En 4 En 4A En 5 En 5K d) En 5A En 5B En 5C En 5D En 6 En 6K En 6A En 7 '20' '25' '25' '30' '30' '30' '30' '30' '30' Med. Medium Medium Semi Free- Cutting C/ Drawn 1506/ 121 Drawn Normalised Drawn Normalised Normalised STCO c) STCO c) STCO c) Hardened Tempered + Drawn Bright Bright Bright Drawn a) ,29 32/ / / a) a) a) a) a) a) a) a) / /1 46/1 32/1 46/ a) Depends on cross-sectional area b) For plate, sheet and strip, the limits for Mn, S & P do not apply, see BS 1449 c) Supplied Composition only d) Available in Hardened and Tempered versions, Suffix letters P, Q, R, S, T, U, V, W, X, Y, Z. 21

22 Metal Series Macreadys Brand Name En Series s Bar End Codes s Properties Related Specifications Bar end Colour -- NMC Usaflat Commercial Engineering -- Blue EN 1A EN 1A EN 3B Usapead Usaled Usamild Freecutting Leaded Freecutting '20' Mild STA5 V 1A BS32 Grade 4 STA5 V 1A BS32 Grade 4 STA5 V 2/3 BS32 Grade 2 Green Magenta Red+Blue EN 6 Usen 6 Medium Tensile Mild BS32 Grade 1 Red+Yellow EN 6A Usakey Medium Tensile Mild BS32 Grade 1 Red+Yellow EN 8 Usapead 40 EN32A EN32B EN 202 Usapead 202 '40' Normalised STA5 V 4A BS32 Grade 1 Yellow Usacase Casehardening STA5 V 15 Red Manganese Casehardening Semi-Freecutting STA5 V 15AM Red+Green EN 16(T) EN 24 EN 24(T) EN 33 EN 36A,B,C EN 56 AM (R) Usapead '5565' Usaloy '16T' Usaloy '24' Usaloy '24T' Usaloy '33' Usaloy '36' KE 40A -- Usapead NSOH -- Usapead HCHC -- Usapead 'Super' Alloy s Manganese Molybdenum Open Hearth Acid 1½ Nickel-Chromium Manganese Molybdenum Electrically Melted 1½ Nickel-Chromium Molybdenum 3 Nickel Casehardening Open Hearth Acid 3 Nickel-Chromium Casehardening Open Hearth Acid Chromium Rust-Resisting Iron, Free-Cutting (Martensitic) Tool s Manganese Oil Hardening Alloy Tool Electrically Melted High High Chromium Alloy Tool Electrically melted 18 Tungsten High Speed Electrically Melted STA5 V 9A White STA5 V 10 White+Blue STA5 V 10 White+Brown STA5 V 17 White+Green STA5 V 18 White+Red -- Brown -- Blue -- Green -- Silver 22