SPECIAL THREADS

Dimensional Charts relating to Pg DIN 4043, METRIC ELECTRICAL, BUTTRESS, KNUCKLE DIN 405 and KNUCKLE DIN 20400 Threads.

Dimensions shown are in mm, if you wish to convert to Inches, please use our universal converter.

PG THREAD DIMENSIONS

The standard, codified by the Deutsches Institut für Normung (DIN, German Institute for Standardization),
is DIN 40430. Panzergewinde sizes are named with the prefix PG plus a nominal
number which approximately corresponds to the maximum cable diameter (in millimeters) that can be passed through the conduit.

The thread is used predomantily to join pieces of electrical conduit and cable glands.

Because the walls of the conduit are usually relatively thin, the thread depth should not be very large.
Thus a thread angle of 80° is used.
The Verband der Elektrotechnik, Elektronik und Informationstechnik (VDE)
(which began as a trade association for standardization in electrical engineering)
originally standardized (and named) the thread for use with conduit and cable glands that were made of steel,
although today the thread is used with both steel (typically plated with combinations of nickel, zinc,
or tin to resist rusting) and polyvinyl chloride (PVC).

Beginning in 2000, the VDE standard for cable glands (VDE 0619) was formally replaced by EN 50262.
After a transitional period of several years during which it could still be used,
it was replaced in 2003 by a final metric fine thread with 1.5mm (0.0591in) pitch.
Similarly, conduit threads were replaced by EN 60423.

PG Thread Dimensions
METRIC Pg ELECTRICAL THREAD DIMENSIONS - DIN 4043
NOMINAL
SIZE
THREAD
FORM
MAJOR
DIAMETER
PITCH THREADS
PER INCH
PITCH
DIAMETER
MINOR DIAMETER
(MALE THREAD)
THREAD
HEIGHT
RADIUS TAPPING DRILL
DIAMETER
mm mm mm
d=D p tpi d2=D2 d1 H1 mm mm
Pg7 Pg 12.5 1.27 20 11.89 11.28 0.61 0.14 11.4
Pg9 Pg 15.2 1.411 18 14.53 13.86 0.67 0.15 14
Pg11 Pg 18.6 1.411 18 17.93 17.26 0.67 0.15 17.25
Pg13.5 Pg 20.4 1.411 18 19.73 19.06 0.67 0.15 19
Pg16 Pg 22.5 1.411 18 21.83 21.16 0.67 0.15 21.25
Pg21 Pg 28.3 1.588 16 27.54 26.78 0.76 0.17 26.75
Pg29 Pg 37 1.588 16 36.24 35.48 0.76 0.17 35.5
Pg36 Pg 47 1.588 16 46.24 45.48 0.76 0.17 45.5
Pg42 Pg 54 1.588 16 53.24 52.48 0.76 0.17 52.5
Pg48 Pg 59.3 1.588 16 58.54 57.78 0.76 0.17 57.75

METRIC ELECTRICAL THREAD DIMENSIONS

Metric Electrical Thread DimensionsMetric Electrical Thread Dimensions

BUTTRESS THREAD DIMENSIONS

The buttress thread form, also known as the breech-lock thread form, refers to two different thread profiles.

One is a type of leadscrew and the other is a type of hydraulic sealing thread form.
The leadscrew type is often used in machinery and the sealing type is often used in oil fields.

In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal.

The thread form is similar to that of Acme thread the force is transmitted almost parallel to the axis and
thread is about the same strength as standard v threads.

Buttress Thread Dimensions
METRIC ELECTRICAL THREAD DIMENSIONS - EN 60423 TABLE 1
NOMINAL
SIZE
THREAD
FORM
TYPE
MAJOR
DIAMETER
PITCH RADIUS PITCH
DIAMETER
MINOR
DIAMETER
MALE
THREAD
MINOR
DIAMETER
FEMALE
THREAD
THREAD
HEIGHT
(MALE
THREAD)
THREAD
HEIGHT
(FEMALE
THREAD)
TAPPING
DRILL
DIAMETER
(mm)
CLEARANCE
DRILL
DIAMETER
(mm)
ISO MF Type d=D P R d2=D2 d3 D1 h3 H1
12x1.5 M 12.00 1.50 0.217 11.026 10.160 10.376 0.920 0.812 10.50 12.500
16x1.5 M 16.00 1.50 0.217 15.026 14.160 14.376 0.920 0.812 14.50 16.500
20x1.5 M 20.00 1.50 0.217 19.026 18.160 18.376 0.920 0.812 18.50 20.500
25x1.5 M 25.00 1.50 0.217 24.026 23.160 23.376 0.920 0.812 23.50 25.500
32x1.5 M 32.00 1.50 0.217 31.026 30.160 30.376 0.920 0.812 30.50 32.500
40x1.5 M 40.00 1.50 0.217 39.026 38.160 38.376 0.920 0.812 38.50 40.500
50x1.5 M 50.00 1.50 0.217 49.026 48.160 48.376 0.920 0.812 48.50 50.500
63x1.5 M 63.00 1.50 0.217 62.026 61.160 61.376 0.920 0.812 61.50 63.500
75x1.5 M 75.00 1.50 0.217 74.026 73.160 73.376 0.920 0.812 73.50 75.500
80x2 M 80.00 2.00 78.00 80.50
85x2 M 85.00 2.00 83.00 85.50
90x2 M 90.00 2.00 88.00 90.50
100x2 M 100.00 2.00 98.00 100.50
100x3 M 100.00 3.00 97.00 100.50
110x3 M 110.00 3.00 107.00 110.50
BUTTRESS COARSE THREAD - DIN 513 DIMENSIONS
NOMINAL DIAMETER OUTSIDE DIAMETER PITCH BOLT THREAD
MINOR DIAMETER
TAPPING SIZE
DRILL
mm mm mm mm
S 10 x 2 10.00 2.00 6,528 7,000
S 12 x 3 12.00 3.00 6,794 7,500
S 14 x 3 14.00 3.00 8,794 9,500
S 16 x 4 16.00 4.00 9,058 10,000
S 18 x 4 18.00 4.00 11,058 12,000
S 20 x 4 20.00 4.00 13,058 14,000
S 22 x 5 22.00 5.00 13,322 14,500
S 24 x 5 24.00 5.00 15,322 16,500
S 26 x 5 26.00 5.00 17,322 18,500
S 28 x 5 28.00 5.00 19,322 20,500
S 30 x 6 30.00 6.00 19,586 21,000
S 32 x 6 32.00 6.00 21,586 23,000
S 34 x 6 34.00 6.00 23,586 25,000
S 36 x 6 36.00 6.00 25,586 27,000
S 38 x 7 38.00 7.00 25,852 27,500
S 40 x 7 40.00 7.00 27,825 29,500
S 42 x 7 42.00 7.00 39,825 31,500
S 44 x 7 44.00 7.00 31,825 33,500
S 46 x 8 46.00 8.00 32,116 34,000
S 48 x 8 48.00 8.00 34,116 36,000
S 50 x 8 50.00 8.00 36,116 38,000
S 52 x 8 52.00 8.00 38,116 40,000
S 55 x 9 55.00 9.00 39,380 41,500
S 60 x 9 60.00 9.00 44,380 46,500
S 65 x 10 65.00 10.00 47,644 50,000
S 70 x 10 70.00 10.00 52,644 55,000
S 75 x 10 75.00 10.00 57,644 60,00
S 80 x 10 80.00 10.00 62,644 65,000
S 85 x 12 85.00 12.00 64,174 67,000
S 90 x 12 90.00 12.00 69,174 72,000
S 95 x 12 95.00 12.00 74,174 77,000
S 100 x 12 100.00 12.00 79,174 82,000

KNUCKLE THREAD DIMENSIONS

Knuckle threads are insensitive to dirt and damage due to their round shape.
They can be used as fastening screw threads in clutch or brake spindles of railway cars as well as for large valves and gates.

These threads are also used in electric bulb and bottles etc.

Knuckle thread Dimensions - DIN405
KNUCKLE THREAD DIN 405 DIMENSIONS
THREAD SIZE NOMINAL DIAMETER BOLT THREAD
MINOR DIAMETER
NUT THREAD
MINOR DIAMETER
PITCH TPI
mm mm mm
Rd 8 x 1/10" 8,254 5,460 5,714 2,540 10
Rd 9 x 1/10" 9,254 6,460 6,714 2,540 10
Rd 10 x 1/10" 10,254 7,460 7,714 2,540 10
Rd 11 x 1/10" 11,254 8,460 8,714 2,540 10
Rd 12 x 1/10" 12,254 9,460 9,714 2,540 10
Rd 14 x 1/8" 14,318 10,825 11,142 3,175 8
Rd 16 x 1/8" 16,318 4,166 12,825 3,175 8
Rd 18 x 1/8" 18,318 14,825 15,142 3,175 8
Rd 20 x 1/8" 20,318 16,825 17,142 3,175 8
Rd 22 x 1/8" 22,318 18,825 19,142 3,175 8
Rd 24 x 1/8" 24,318 20,825 21,142 3,175 8
Rd 28 x 1/8" 28,318 24,825 25,142 3,175 8
Rd 30 x 1/8" 30,318 26,825 27,142 3,175 8
Rd 32 x 1/8" 32,318 28,825 29,142 3,175 8
Rd 34 x 1/8" 34,318 30,825 31,142 3,175 8
Rd 36 x 1/8" 36,318 32,825 33,142 3,175 8
Rd 38 x 1/8" 38,318 34,825 35,142 3,175 8
Rd 40 x 1/16" 40,423 35,767 36,190 4,233 6
Rd 42 x 1/16" 42,423 37,767 38,190 4,233 6
Rd 44 x 1/16" 44,423 39,767 40,190 4,233 6
Rd 46 x 1/16" 46,423 41,767 42,190 4,233 6
Rd 48 x 1/16" 48,423 43,767 44,190 4,233 6
Rd 50 x 1/16" 50,423 45,767 46,190 4,233 6
Rd 52 x 1/16" 52,423 47,767 48,100 4,233 6
Rd 55 x 1/16" 55,423 50,767 51,190 4,233 6
Rd 58 x 1/16" 58,423 53,767 54,190 4,233 6
Rd 60 x 1/16" 60,423 55,767 56,190 4,233 6
Rd 62 x 1/16" 62,423 57,767 58,190 4,233 6
Rd 65 x 1/16" 65,423 60,767 61,190 4,233 6
Rd 68 x 1/16" 68,423 63,767 64,190 4,233 6
Rd 70 x 1/16" 70,423 65,767 66,190 4,233 6
Rd 72 x 1/16" 72,423 67,767 68,190 4,233 6
Rd 75 x 1/16" 75,423 70,767 71,190 4,233 6
Rd 78 x 1/16" 78,423 73,767 74,190 4,233 6
Rd 80 x 1/16" 80,423 75,767 76,190 4,233 6
Rd 82 x 1/16" 82,423 77,767 78,190 4,233 6
Rd 85 x 1/16" 85,423 80,767 81,190 4,233 6
Rd 88 x 1/16" 88,423 83,767 84,190 4,233 6
Rd 90 x 1/16" 90,423 85,767 86,190 4,233 6
Rd 92 x 1/16" 92,423 87,767 88,190 4,233 6
Rd 95 x 1/16" 95,423 90,767 91,190 4,233 6
Rd 98 x 1/16" 98,423 93,767 94,190 4,233 6
Rd 100 x 1/6" 100,423 95,767 96,190 4,233 6
Rd 105 x 1/4" 105,635 98,650 99,285 6,350 4
Rd 110 x 1/4" 110,635 103,650 104,285 6,350 4
Rd 115 x 1/4" 115,635 108,650 109,285 6,350 4
Rd 120 x 1/4" 120,635 113,650 114,285 6,350 4
Rd 120 x 1/4" 120,635 113,650 114,285 6,350 4
Rd 125 x 1/4" 125,635 118,650 119,285 6,350 4
Rd 130 x 1/4" 130,635 123,650 124,285 6,350 4
Rd 135 x 1/4" 135,635 128,650 129,285 6,350 4
Rd 140 x 1/4" 140,635 133,650 134,285 6,350 4
Rd 145 x 1/4" 145,635 138,650 139,285 6,350 4
Rd 150 x 1/4" 150,635 143,650 144,285 6,350 4
Rd 155 x 1/4" 155,635 148,650 149,285 6,350 4
Rd 160 x 1/4" 160,635 153,650 154,285 6,350 4
Rd 165 x 1/4" 165,635 158,650 159,285 6,350 4
Rd 170 x 1/4" 170,635 163,650 164,285 6,350 4
Rd 175 x 1/4" 175,635 168,650 169,285 6,350 4
Rd 180 x 1/4" 180,635 173,650 174,285 6,350 4
Rd 185 x 1/4" 185,635 178,650 179,285 6,350 4
Rd 190 x 1/4" 190,635 183,650 184,285 6,350 4
Rd 195 x 1/4" 195,635 188,650 189,285 6,350 4
Rd 200 x 1/4" 200,635 193,650 194,285 6,350 4
Knuckle thread Dimensions - DIN20400
KNUCKLE THREAD DIN 20400 DIMENSIONS
NOMINAL SIZE MAJOR DIAMETER PITCH DIAMETER MINOR DIAMETER TAPPING DRILL
MIN MAX MIN MAX MIN MAX
Rd10x3 10.3 10.54 8.5 8.74 7 7.24 7,000
Rd12x3 12.3 12.54 11 10.74 9 9.24 9,000
Rd14x3 14.3 14.54 13 12.74 11 11.24 11,000
Rd16x4 16.4 16.72 14 14.32 12 12.32 12,000
Rd18x4 18.4 18.72 16 16.32 14 14.32 14,000
Rd02x4 20.4 20.72 18 18.32 16 16.32 16,000
Rd22x4 22.4 22.72 20 20.32 18 18.32 18,000
Rd25x4 25.4 25.72 23 23.32 21 21.32 21,000
Rd28x4 28.4 28.72 26 26.32 24 24.32 24,000
Rd32x4 32.4 32.72 30 30.32 28 28.32 28,000
Rd36x5 36.5 36.9 34 33.9 31 31.4 31,000
Rd40x5 40.5 40.9 38 37.9 35 35.4 35,000
Rd42x5 42.5 42.9 40 39.9 37 37.4 37,000
Rd45x5 45.5 45.9 43 42.9 40 40.4 40,000
Rd48x5 48.5 48.9 46 45.9 43 43.4 43,000
Rd50x5 50.5 50.9 48 47.9 45 45.4 45,000
Rd53x5 53.5 53.9 51 50.9 48 48.4 48,000
Rd56x5 56.5 56.9 54 53.9 51 51.4 51,000
Rd60x6 60.6 61.08 57 57.48 54 54.48 54,000
Rd63x6 63.6 64.08 60 60.48 57 57.48 57,000
Rd67x6 67.6 68.08 64 64.48 61 61.48 61,000
Rd70x6 704 71.08 67 67.48 54 64.48 64,000
Rd75x6 75.6 76.08 72 72.48 69 69.48 69,000
Rd80x6 80.6 81.08 77 77.48 74 74.48 74,000
Rd85x6 85.6 86.08 82 82.48 79 79.48 79,000
Rd90x8 90.8 91.44 86 86.64 82 82.64 82,000
Rd95x8 95.8 96.44 91 91.64 87 87.64 87,000
Rd100x8 101 101.4 96 96.64 92 92.64 92,000
Rd106x8 107 107.4 102 102.6 98 98.64 98,000
Rd112x8 113 113.4 108 108.6 104 104.6 104,000
Rd118x8 119 119.4 114 114.6 110 110.6 110,000
Rd125x8 126 126.4 121 121.6 117 117.6 117,000
Rd132x10 133 133.8 127 127.8 122 122.8 122,000
Rd140x10 141 141.8 135 135.8 130 130.8 130,000
Rd150x10 151 151.8 145 145.8 140 140.8 140,000
Rd160x10 161 161.8 155 155.8 150 150.8 150,000
Rd170x10 171 171.8 165 165.8 160 160.8 160,000
Rd180x12 181 182.2 174 176 168 169 168,000
Rd190x12 191 192.2 184 185 178 179 178,000
Rd200x12 201 202.16 194 195 188 189 188,000
Rd212x12 213 214.2 206 207 200 201 200,000
Rd224x12 225 226.2 218 219 212 213 212,000
Rd236x16 238 238.9 228 229.3 220 221.3 220,000
Rd250x16 252 252.9 242 243.3 234 235.3 234,000
Rd265x16 267 267.9 257 258.3 249 250.3 249,000
Rd280x16 282 282.9 272 273.3 264 265.3 264,000
Rd300x16 302 302.9 292 293.3 284 285.3 284,000