External Thread Dimensions for Unified UNC Screw Threads Diameter Pitch TPI Thread Fit Class Major Diameter Pitch Diameter Minor Diameter Stress Area Max Min Max Min Max Min in 178 64 2A 0 0724 0 0686 0 0623 0 0603 0 0538 0 00263 No2022 2 24 nbsp 0183 32 5 8 625 So no the barrel is not big enough to thread 5 8 x 24 Pretty much all thread on suppressors I know of use a flat shoulder behind the threads to snug up against This shoulder mates up with a flat surface on the rear of the suppressor or QD adapter to insure proper alignment with the bore External Thread Dimensions Major Dia Pitch Dia Minor Dia Designation Size Decimal TPI Tol Class Max Min Max Min Max Min 3 8 12 Acme 0 375 12 2G 0 375 0 37 0 3284 0 3161 0 2817 0 2632 1 2 10 Acme 0 5 10 2G Thread Major Diameter Thread per Inch Pitch Diameter Minor Diameter Male Thread Minor Diameter Thread 1 4 0 2500 28 0 2268 0 2074 0 2113 5 16 0 3125 24 0 2854 0 2629 0 2674 3 8 0 3750 24 0 3479 0 3254 0 3299 7 16 0 4375 20 0 4050 0 3780 0 38343 8 16 24 7 16 14 20 1 2 13 20 9 16 12 18 5 8 11 18 3 4 10 16 7 8 9 14 1 8 14 1 1 8 7 12 1 1 4 7 12 1 3 8 6 12 1 1 2 6 12 1 3 4 5 2 4 1 2 2 1 2 4 3 4 METRIC SIZE COARSE THREAD FINE THREAD EXTRA FINE M6 1 00 075 M8 1 25 1 00 M10 1 50 1 25
SIZE THREAD TPI DIA DRILL 1 4 SPARK 24 0 25 0 196 3 8 SPARK 24 0 375 0 321 7 8 SPARK 18 0 875 0 803 UNF Unified Fine SIZE THREAD TPI DIA DRILL 1 4 UNF 28 0 25 0 206 5 16 UNF 24 0 313 0 261 3 8 UNF 24 0 375 0 3242022 2 24 nbsp 0183 32 SC USA Nov 5 2011 18 Re minimum barrel size to thread for 5 8 24 mount Just measured the ID of the endcap on my suppressor It is relieved slightly so the diameter is 640 That should leave a 038 shoulder of actual metal to metal contact muzzle at 715 OD Seems mighty thin to me 5 8 24 TPI thread featuring High pitch diameter tolerance class 3B threads machined in the same operation as the bore ensures a perfect concentricity this combined with a progressively decreasing baffle thickness and maximized venting area significantlyChoose from our selection of 5 8 quot 24 taps in a wide range of styles and sizes In stock and ready to ship Cut threads into most metal and plastic These high speed steel taps are durable enough for small scale tapping jobs but they re not recommended for production use 24 O D 24 000 8 0 12500 23 71250 2 375 19 00 23 86094 3 2500 26 00 23 91562 3 6837 23 6125 Note The dimensions of the NPT Thread are given to four or five decimal places While this implies a greater degree of precision than is ordinarily achieved
1900 4 83 10 24 32 1969 5 00 M5 0 8 0 5 2087 5 30 1 28 1 4 2160 5 49 12 24 28 32 2188 5 56 7 32 quot 28 Dia Thread Pitch in mm Coarse Fine THREAD SIZE COMPARISON CHART Dia Siz e Gau ge Si e ge BRITISH No of Threads Inch BA BSW BSF 8 Thread Series 8 UN and 8 UNR Series constant pitch threads with a pitch of 8 threads per inch Numerical tabulation of sizes major minor and pitch diameters Also the Minor2013 2 12 nbsp 0183 32 Thread Form Type Major Diameter mm d D Pitch mm p Threads per inch Pitch Diameter mm d2 D2 Minor Diameter Male Thd d3 Thread Height H1 Tap Drill Diameter mm G1 8 1 8 quot BSPP 9 728 0 907 28 9 147 8 566 0 581 8 70 G1 4 1 4 quot BSPP 13 157 1 337Male Thread O D Thread I D 1 8 2 5 16 24 5 16 17 64 3 16 3 3 8 24 3 8 21 64 1 4 4 7 16 20 7 16 25 64 5 16 5 1 2 20 1 2 29 64 3 8 6 9 16 18 9 16 1 2 1 2 8 3 4 16 3 4 11 16 5 8 10 7 8 14 7 8 13 16 3 4 12 1 1 16 12 1 1 16 31 32 1 16 1 5 16 12 1 5 16 1 1 95 rows nbsp 0183 32 ANSI ASME EXTERNAL Screw Thread Size Chart All units are in inches Unified
UNS Unified National Thread UNS screw threads that have special combinations of diameter and pitch with tolerance to Unified formulation have the basic form designation set out first followed always by the limits of size 10 1 4 quot 5 16 quot 1 2 quot 9 16 quot 1 quot 1 1 8 quot 1 7 8 quot 2 quot 2 1 2 quot 2 3 4 quot 3 3 4 quot 4 quot 6 quot Nominal Size External b Internal 3 8 quot 24 UNF 0 375 9 525 8 50 24 1 058 7 16 quot 20 UNF 0 438 11 112 9 90 20 1 270 1 2 quot 20 UNF 0 500 12 700 11 50 20 1 270 9 16 quot 18 UNF 0 563 14 288 12 90 18 1 411 5 8 quot 18 UNF 0 625 15 875 14 50 18 1 411 3 4 quot 16 UNF 0 750 19 050 17 50 16 1 587 2015 2 13 nbsp 0183 32 The thread series is generally relative to the outside diameter of the screw 20 threads per inch on a 1 4 quot diameter screw is considered coarse 1 4 20 UNC On a 3 4 quot diameter screw 20 threads per inch is considered extra fine 3 4 20 UNEF It also plays a role in determining the length of engagement UN standard series thread 95 rows nbsp 0183 32 ANSI ASME INTERNAL Screw Thread Size Chart All units are in inches Unified Screw Threads per ANSI ASME B1 1 1989 R2001 R2001 Nomenclature are used Acceptability criteria are described in ANSI ASME B1 3M 1992 R2001 Note This screw chartHome Product Thread Pitch 5 8 X 24 President s Day Sale Buy any 3 items and receive 5 00 off your order Today THROUGH MONDAY Home
2015 8 14 nbsp 0183 32 UNEF is a standard extra fine You could call out a 5 8 56 and properly call it a UN but most drawings would probably call it UNS for Unified National Special I m no smith either but I would choose a class 3 fit The major diameter of a 5 8 24 is 0 6250 0 6185 whereas a 5 8 32 major is 0 6250 0 6190 both class 3 3 8 24 7 16 20 1 2 20 9 16 18 Length is measured from under the head to the end of the bolt 4 40 9 16 1 2 7 16 3 8 5 16 1 4 10 8 6 4 Coarse thread Fine thread Coarse thread Fine thread Coarse thread Fine thread Coarse thread Fine threadMachine Screws Thread Dimensions L L Major Dia Pitch Dia Minor Dia Axis of screw thread 2A External Threads for Machine Screws and SEMS ASME B 1 1 2002 Nominal Size Thread TPI Type Major Diameter Allowance 2021 2 2 nbsp 0183 32 For instance when a screw or bolt measures 5 9mm it is called a 6mm thread There are two common methods to write the thread dimensions 1 Thread sizes in inches are specified by diameter and threads per inch For example in the screw size 10 24 the29 rows nbsp 0183 32 2016 5 16 nbsp 0183 32 3 8 quot 32 UNEF 0 3750 9 525 8 85 32 0 794 7 16 quot 28 UNEF 0 4375 11 112 10 35 28 0 907 1 2 quot 28 UNEF 0 5000 12 700 11 80 28 0 907 9 16 quot 24 UNEF 0 5625 14 288 13 40 24 1 058 5 8 quot 24 UNEF 0 6250 15 875 15 00 24 1 058 11 16 quot 24 UNEF 0 6875 24