Specification for stud bolts

SPECIFICATION FOR STUD BOLTS
AND TAP END STUDS
TECHNICAL REPORT TR9501
Revision A
AWHEM publications may be used by anyone desiring to do so. Every effort has been made by the
Association to assure the accuracy and reliability of the data contained in them; however, the Association
makes no representation, warranty, or guarantee in connection with this publication and hereby expressly
disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any
federal, state or municipal regulation with which this publication may conflict.
Association of Well Head
Equipment Manufacturers
Post Office Box 1166
Bellaire, Texas 77401

Issue Date:
June 6, 1995
Revision A
June 11, 2002
AWHEM
RECOMMENDATION FOR INTERCHANGEABLE
STUD BOLTS AND TAP END STUDS
FOR API SPEC 6A FLANGES
ISSUED BY:
ASSOCIATION OF WELL HEAD
EQUIPMENT MANUFACTURERS
POST OFFICE BOX 1166 @ BELLAIRE, TEXAS 77401
This document submitted for industry acceptance. We solicit any corrections, revisions and comments that you may offer.

AWHEM Recommendation For Stud Bolts and Tap End Studs For API Spec 6A 2
TABLE OF CONTENTS
Section 1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Reference Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 Method of calculating stud bolt lengths for type 6B and 6BX flanges . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Stud bolt length table for 6B flange connections with "R" and "RX" gaskets . . . . . . . . . . . . . . . . . 5
2.2 Stud bolt length table for 6BX flange connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.0 Method of calculating tap end stud lengths for type 6B and 6BX flanges . . . . . . . . . . . . . . . . . . . . 7
3.1 Tap end stud length table for 6B studded flange connections with "R" and "RX" gaskets . . . . . . . . . 8
3.2 Tap end stud length table for 6BX studded flange connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Appendix A - Stud bolt length table for 6B flange connections with "R" gaskets . . . . . . . . . . . . . . . . . . . . . . . . . 10
Appendix B - Tap end stud length table for 6B studded flange connections with "R" gaskets . . . . . . . . . . . . . . . . 11

1.0 GENERAL
This AWHEM Recommendation compliments and
extends but does not conflict with API Spec 6A.
1.1 PURPOSE
ThisAWHEMRecommendationestablishesdefinite
dimensions for stud bolts and tap end studs for use
with API Spec 6A flanges/studded flange
connections and provides for dimensionally
interchangeable stud bolts and tap end studs for API
Spec 6A flanges/studded flange connections. Stud
bolts and tap end studs that may have other lengths
etc. for special purposes, and comply with the
requirements of API Spec 6A, are beyond the scope
of this document.
1.2 REFERENCE DOCUMENT
API Spec 6A.
Note: This AWHEM Recommendation derives its
basis from API Spec 6A and those standards
referenced therein. Any subsequent
supplements to API Spec 6A, 17th
Edition, or
subsequent editions issued, shall require
review and revision of this AWHEM
Recommendation to assure its application.
1.3 DEFINITIONS:
Length, (Tap End Stud or Stud Bolt) -
Measurement end to end, including points.
Length, Nut End Thread -
2-1/2 x Diameter = Minimum thread length of
full threads measured from the end of the stud.
Length, Tap End Thread -
One diameter + maximum point = minimum
thread length, measured from the end of the stud
to the end of thread run out (to the last scratch
on cut threads, or to the last impression of
threads made by other means).
NOTE: The manufacturer shall have and use a
means to demonstrate that his threading process
produces sufficient full threads on the stud to
achieve one (1) diameter of engagement with the
respective tapped holes.
Point -
End portion of the stud that features incomplete
threads to facilitate thread engagement. The
maximum length of the point shall equal 1.5
times the pitch of the thread.
Stud Bolts (For Through Bolt Flanges) -
Studs that have threads over their full length or
may have an unthreaded portion on the central
area of the body diameter.
Tap End Studs (For Studded Flanges) -
Studs threaded on each end with an unthreaded
portion on the body diameter. The thread length
dimension on one end controls the depth that
that end will engage into a tapped hole, and also
controls the extension length of the stud beyond
a studded flange.
Threads -
All studs and bolts shall have Class 2A unified
inch screw threads per ASME B1.1-1989
(Revision of ANSI B1.1-1982) Standard.
Size 1" and below shall have UNC threads.
Size 1-1/8" and above shall have 8 threads per
inch.
1.4 APPLICATION
API Spec 6A, "6B" flanges, may use "R" or "RX"
gaskets, "RX" gaskets producing greater standoff
between flanges. Tables for "6B" flanges in this
document show stud bolt and tap end stud lengths
that will accommodate both "R" and "RX" gaskets.
Some equipment designs provide very little nut and
wrench clearance, so occasions may arise when
manufacturers or users must install shorter stud bolts
or tap end studs when using the "R" gaskets. For this
reason, Appendices A and B follow in this document
to provide lengths for "R" gaskets only.

WITH R GASKET
API TYPE 6B FLANGE
S
L
WITH RX GASKET
STUD BOLT WITH NUTS
POINT HEIGHT
L
API TYPE 6B FLANGE
L
S
Figure 2.0-1
L
API TYPE 6BX FLANGE
NO STANDOFF
2.0 METHOD OF CALCULATING STUD BOLT LENGTHS FOR TYPE 6B AND 6BX FLANGES
2.0a CALCULATION. The following formula was
used in establishing stud bolt lengths listed in
the tables and is included here for the
convenience of industry. Length shown in
tables results from rounding as specified in
paragraph 2.0b.
L = 2(T + t + d) + S + 2(P)
Where:
L = Calculated stud bolt length.
T = Total flange thickness.
t = Plus tolerance for flange thickness.
d = Heavy hex nut thickness (equals nominal bolt
diameter; see ANSI B 18.2.2: Square and
Hex Nuts).
S = Flange face standoff. S = 0 for BX
assemblies. See Figure 2.0-1.
P = Maximum end point height (1.5 x Pitch of
thread).
2.0b ROUNDING OFF PROCEDURE. If L is
0.010 inch (or more) greater than any 1/4 inch
increment, round off upward to the next 1/4 inch
increment; if less than 0.010 inch, round off
downward to the next 1/4 inch increment.
2.0c END POINT-HEIGHT OF STUD BOLTS.
The end point is the end portion of a stud bolt
beyond the complete thread; and may be
chamfered, rounded, or sheared. The maximum
height of each end point shall be 1.5 x pitch of
thread.
2.0d FLANGE FACE STANDOFF VALUES, S.
The approximate distance between faces of
made-up flanges, S is given in API Spec 6A for
R and RX ring gaskets.

(with "RX" gasket )
1/4
STUD BOLT LENGTH TABLE FOR 6B FLANGE CONNECTIONS WITH "R" AND "RX" GASKETS
DIA.
BOLT
1.000
1.125
1.375
1.125
1.375
1.625
1.250
1.375
1.875
1.250
1.375
1.500
1.625
1.625
2.000
LENGTH
2( T + t + d ) + S + 2( P )
tolerance on bolt length:
1/8
*
+
5-1/8
5-1/8
5-1/8 5M
2M
3M
1.500
1.000
1.250
3-1/8
4-1/16
4-1/16
4-1/16
2-9/16
2-9/16
3-1/8
3-1/8
3M
5M
5M
2M
1.125
1.250
1.125
0.875
2M
3M
3M
5M
0.750
0.875
1.000
1.000
16-3/4
16-3/4
21-1/4
20-3/4
3M
2M
3M
13-5/8
13-5/8
11
11
11
9
9
5M
2M
3M
2M
3M
5M
2M
3M
ACCOMMODATES
"R" AND "RX" TYPE GASKETS
Point Max.
Heavy hex nut thickness.
Plus tolerence for flange thickness.
Total flange thickness.
Flange face standoff.
P
SIZE
FLANGE
2-1/16
2-1/16
2-1/16
2-9/16
5M
2M
2M
3M
0.875
0.750
0.625
0.875
DIA.
BOLT
S
d
t
LENGTH
T
=
(1.5 X Pitch)
FLANGE
SIZE
7-1/16
7-1/16
7-1/16
9
LENGTH
2M
3M
5M
2M
DIA
LENGTH
2.1
POINT
LENGTH
POINT
5.000
6.500
6.500
5.500
7.000
7.000
5.750
6.500
7.750
6.500
7.500
8.500
7.250
8.250
10.500
7.500
8.500
11.250
8.500
9.500
12.500
9.250
10.000
14.250
9.500
10.750
10.750
12.250
12.250
15.000
+
inch for lengths up to 12 inches.
inch for lengths over 12 inches.
-
- 0
0,
,
* *

1.875
1.625
2.000
1.750
2.500
2.000
3.000
2.250
2.000
1.875
1.875
3.000
2.250
1.875
1.625
2.750
2.000
1.750
BOLT
STUD BOLT LENGTH TABLE FOR 6BX FLANGE CONNECTIONS
DIA.
2.50020M9
1.875
1.500
2.000
1.500
1.500
1.125
1.750
1.375
1.125
1.375
1.125
1.000
1.250
1.000
0.875
15M4-1/16
7-1/16
7-1/16
7-1/16
5-1/8
4-1/16
9
9
15M
15M
10M
20M
10M
10M
20M
4-1/16
3-1/16
3-1/16
3-1/16
2-9/16
2-9/16
2-9/16
10M
20M
15M
10M
20M
15M
10M
10M21-1/4
26-3/4
26-3/4
30
30
3M
2M
3M
2M
21-1/4
18-3/4
18-3/4
18-3/4
16-3/4
16-3/4
13-5/8
5M
15M
10M
5M
5M
20M
10M
"BX" TYPE GASKET
1.125
0.875
0.750
1.000
0.875
0.750
Point Max.
2-1/16
2-1/16
2-1/16
1-13/16
1-13/16
1-13/16
SIZE
FLANGE
20M
15M
10M
20M
15M
10M
BOLT
DIA.
P
S
d
t
T
LENGTH =
13-5/8
13-5/8
13-5/8
11
LENGTH
11
11
5M
20M
15M
10M
FLANGE
SIZE
15M
10M
(1.5 X Pitch)
LENGTH
2.2
LENGTH
5.500
6.000
7.750
5.500
6.500
8.500
6.500
7.250
9.500
7.250
8.000
10.250
8.500
9.750
12.500
9.250
11.750
13.000
17.750
13.500
16.000
21.750
15.250
19.500
23.750
12.750
17.750
21.250
29.750
14.750
17.750
17.750
22.750
26.750
19.000
24.750
14.250
17.500
14.500
17.750
2( T + t + d ) + S + 2( P )
0
0
1/8
1/4+
+
,
,
-
-
*
* *
5-1/8 15M 1.500 11.500
DIA
POINT POINT
LENGTH
NO STANDOFF

TAP END STUD WITH NUT
POINT HEIGHT
L
API TYPE 6B FLANGE API TYPE 6BX FLANGEAPI TYPE 6B FLANGE
L
WITH R GASKET WITH RX GASKET
S S
L
NO STANDOFF
L
Figure 3.0-1
3.0 METHOD OF CALCULATING TAP END STUD LENGTHS FOR TYPE 6B AND 6BX FLANGES
3.0a CALCULATION. The following formula was
used in establishing tap end stud lengths listed in
the tables and is included here for convenience of
industry. Length shown in tables results from
rounding as specified in paragraph 3.0b.
L = T + t + d + S + P + TL + RF
Where:
L = Calculated tap end stud length.
T = Total flange thickness.
t = Plus tolerance for flange thickness.
d = Heavy hex nut thickness (equals nominal bolt
diameter; see ANSI B 18.2.2: Square and Hex
Nuts).
S = Flange face standoff. S = 0 for BX assemblies.
See Figure 3.0-1.
P = Maximum end point height (1.5 x Pitch of
thread).
TL = Tap end thread length, maximum [(one diameter
+ 1.5 pitch) + 1/16 - 0].
RF = Add amount of raised face present on studded
flanges, if not omitted, to the length of studs in
table.
3.0b ROUNDING OFF PROCEDURE. Add
1/16 inch to the calculated length and then
round up to the next 1/8 inch increment after
this addition. This rounding procedure
allows for variation in stud installation
methods and assures sufficient extension for
full nut engagement.
3.0c END POINT-HEIGHT OF TAP END
STUDS. The end point is the end portion of
a stud bolt beyond the complete thread and
may be chamfered, rounded, or sheared. The
maximum height of each end point shall be
1.5 x pitch of thread.
3.0d TAP END THREAD LENGTH. One
diameter of tap end stud + 1.5 pitch of thread,
+1/16 -0 maximum (this includes point
height).
3.0e NUT END THREAD LENGTH. 2.5 x
diameter of tap end stud minimum. However
if necessary, this length shall be limited to
provide minimum unthreaded portion equal
to one thread pitch between the tap end
threads and nut end threads.
3.0f FLANGE FACE STANDOFF VALUES,
S. The approximate distance between faces
of made-up flanges, S is given in API Spec
6A for R and RX ring gaskets.

DIA. LENGTHLENGTH LENGTHSIZESIZE LENGTHLENGTH LENGTHDIA.
5-1/8
5-1/8
5-1/8
4-1/16
4-1/16
4-1/16
3-1/8
3-1/8
2-9/16
3-1/8
2-9/16
2-9/16
2-1/16
2-1/16
2-1/16
1.500
1.250
1.000
1.250
5M
3M
2M
5M
1.125
0.875
1.125
0.875
3M
2M
5M
3M
3.750
3.125
2.500
3.125
2.813
2.188
2.813
2.188
0.750
1.000
1.000
0.750
2M
5M
3M
2M
0.875
0.875
0.625
3M
5M
2M
1.875
2.500
2.500
1.875
2.188
2.188
1.563
20-3/4
21-1/4
16-3/4
16-3/4
3M
2M
2.000
1.625
3M
2M
1.625
1.500
13-5/8
13-5/8
11
11
3M
2M
1.375
1.250
5M
3M
1.875
1.375
5.000
4.063
4.063
3.750
3.438
3.125
4.688
3.438
11
9
9
9
2M
5M
1.250
1.625
3M
2M
1.375
1.125
7-1/16
7-1/16
7-1/16
1.1253M
5M 1.375
2M 1.000
3.125
4.063
3.438
2.813
2.813
3.438
2.500
TAP END STUD LENGTH TABLE FOR 6B STUDDED FLANGE CONNECTIONS WITH "R" AND "RX GASKETS
(1.5 X Pitch)
T + t + d + S + P + TL + RF
Plus tolerance for flange thickness.
Tap end thread length, maximum
1.5 Pitch) + 1/16 - 0]
+1/16
- 0
TAP END THREAD
length of studs in table.
studded flanges, if not omitted, to the
Add amount of raised face present on
FLANGE TAP ENDSTUD
RF
TL
NUT END
(one diameter +
LENGTH
S
P
d
t
T
Point, maximum
=
POINT
"R" AND "RX" TYPE GASKETS
ACCOMMODATES
LENGTH
(D+1.5 PITCH)
LENGTH
3.1
FLANGE STUD
.
TAP END NUT END
(with "RX" gasket)
POINT
FULL THREAD MIN.
LENGTH
NUT END THREAD
PORTION SHALL
1 THREAD PITCH
BE EQUAL TO
UNTHREADED
LENGTH
MINIMUM
(2-1/2 D)
[
inch
tolerance on tap end thread length:
01/16+ , -
* tolerance on tap end stud length
*
1/8 0- inch+ ,
*
* *** **
0.761
1.042
1.042
0.900
1.188
1.188
0.900
1.042
1.313
1.042
1.313
1.438
1.188
1.438
1.688
1.188
1.313
1.563
1.313
1.563
1.813
1.438
1.563
2.063
1.438
1.563
1.688
1.813
1.813
2.188
3.625
4.625
4.625
4.000
5.125
5.125
4.125
4.625
5.625
4.625
5.500
6.125
5.250
6.000
7.375
5.375
5.875
7.500
5.875
6.750
8.500
6.500
7.000
9.625
6.625
7.375
7.500
8.375
8.375
10.125

4.6882.188 1.87510M13-5/80.87515M2-1/16
2.500
1.875
9
9
20M
15M
6.250
4.688
4-1/16
1.500
2.000
1.500
1.500
1.125
1.750
1.375
1.125
7-1/16
9
7-1/16
7-1/16
10M
20M
15M
10M
5-1/8
4-1/16
4-1/16
10M
20M
15M
10M
3.750
5.000
3.750
3.750
2.813
4.375
3.438
2.813
1.375
1.125
1.000
1.250
1.000
0.875
1.125
20M2-9/16
3-1/16
3-1/16
3-1/16
15M
20M
10M
2-9/16
2-9/16
2-1/16
10M
15M
20M
3.125
2.813
3.438
2.500
2.188
2.500
2.813
21-1/4
1.875
1.625
2.000
1.750
2.500
2.000
30
30
3M
2M
26-3/4
26-3/4
21-1/4
3M
2M
10M
5M
4.688
4.063
5.000
4.375
6.250
5.000
3.000
2.250
2.000
1.875
1.875
3.000
2.250
10M16-3/4
18-3/4
18-3/4
18-3/4
10M
15M
5M
16-3/4
13-5/8
13-5/8
20M
5M
15M
4.688
5.625
7.500
5.000
7.500
4.688
5.625
TAP END STUD LENGTH TABLE FOR 6BX STUDDED FLANGE CONNECTIONS
LENGTH
0.750
1.000
0.875
0.7501-13/16
1-13/16
1-13/16
2-1/16
20M
10M
15M
FLANGE
SIZE
STUD
10M
DIA.
2.500
1.875
2.188
NUT ENDTAP END
LENGTH LENGTH
1.875
Point, maximum
d
P
S
t
T
LENGTH =
(1.5 X Pitch)
"BX" TYPE GASKET
LENGTH
3.2
1.5 Pitch) + 1/16 - 0]
1.625
2.750
2.000
1.750
STUD
13-5/8
11
11
20M
5M
15M
FLANGE
SIZE
11 10M
6.875
4.063
5.000
TAP END
LENGTHDIA.
NUT END
4.375
LENGTH
(one diameter +
RF
TL
LENGTH
+
tolerance on tap end stud length
+
*
inch01/8 ,
0
-
1/16 -, inch
tolerance on tap end thread length:*
* *** * *
[
3.7500.900
4.1251.042
5.1251.188
3.8750.900
4.3751.042
5.7501.313
4.3751.042
4.8751.188
6.2501.438
5.0001.188
5.5001.313
6.7501.563
5.7501.313
6.5001.563
8.3751.938
6.0001.313
7.7501.688
8.3751.688
11.1252.188
8.5001.688
10.1252.063
13.7502.688
9.7501.938
12.0002.188
15.0002.938
8.3751.813
11.0002.063
13.2502.438
18.1253.188
9.5002.063
11.0002.063
11.2502.188
14.0002.438
16.7503.188
11.7502.188
15.1252.688
9.1251.938
11.0002.188
9.2501.813
11.0002.063
T + t + d + S + P + TL + RF
*
7.6255-1/8 15M 1.500 1.688 3.750
NUT END THREADTAP END THREAD
1 THREAD PITCH
PORTION SHALL
POINT
(D+1.5 PITCH)
- 0
+1/16LENGTH
MINIMUM
UNTHREADED
BE EQUAL TO
POINT
(2-1/2 D)
FULL THREAD MIN.
LENGTH
LENGTH
NO STANDOFF

2-9/16
10.250
8.000
7.000
8.250
7.250
6.250
7.500
6.250
5.500
6.750
6.750
1.2505M4-1/16
5-1/8
5-1/8
5-1/8
3M
5M
2M
1.250
1.500
1.000
4-1/16
4-1/16
3-1/8
3-1/8
3-1/8
2-9/16
2-9/16
0.8753M
2M
3M
5M
0.875
1.125
1.125
2M
5M
3M
0.750
1.000
1.000
10.5001.5002M16-3/4
20-3/4
21-1/4
16-3/4
2M
3M
3M
1.625
2.000
1.625
11750
14.500
12.000
3M11
13-5/8
13-5/8
11
2M
3M
5M
11
9
9
2M
5M
3M
9.7501.375
1.250
1.375
1.875
9.250
10.500
14.000
1.250
1.625
1.375
9.000
12.250
9.250
APPENDIX A
5.250
6.250
6.250
4.750
2( T + t + d ) + S + 2( P )
Point Max.
LENGTH
STUD BOLT LENGTH TABLE FOR 6B FLANGE CONNECTIONS WITH "R" GASKETS
2-1/16
2-1/16
2-1/16
FLANGE
SIZE
2M
5M
3M
2M
0.750
0.875
0.875
0.625
P
BOLT
DIA.
LENGTH
t
d
S
T
=
ACCOMMODATES
"R" TYPE GASKETS ONLY
(with "R" gasket)
7-1/16
7-1/16
7-1/16
9 2M
5M
3M
2M
(1.5 X Pitch)
SIZE
FLANGE
1.125
1.375
1.125
1.000
8.250
11.000
8.250
7.250
BOLT
DIA. LENGTH
0
0
1/8
1/4+
+
,
,
-
-
*
* *
LENGTH LENGTH
POINTPOINT
DIA

STUD TAP END NUT ENDFLANGE FLANGE NUT ENDTAP ENDSTUD
LENGTH
5-1/8 5M 1.500 3.750
3-1/8 2M 0.750 1.875
4-1/16 3M 1.125
5M
2M
3M
5-1/8
5-1/8
4-1/16
1.000
1.250
1.250
3M
5M
2M
3-1/8
4-1/16
3-1/8
1.125
0.875
0.875
2.813
2.500
3.125
3.125
2.813
2.188
2.188
2-1/16
2M
3M
5M
2-9/16
2-9/16
2-9/16
1.000
1.000
0.750
2M
3M
5M
2-1/16
2-1/16
SIZE
0.875
0.875
0.625
DIA.
2.500
2.500
1.875
LENGTHLENGTH
2.188
2.188
1.563
20-3/4 3M 2.000 5.000
11 2M 1.250 3.125
1.375
1.875
1.250
1.375
1.500
1.625
1.625
13-5/8 3M
16-3/4
16-3/4
21-1/4
3M
2M
2M
13-5/8
11
11
5M
2M
3M
3.438
4.063
4.063
3.750
4.688
3.125
3.438
DIA.
1.000
1.125
1.375
1.125
1.375
1.625
7-1/16
9
9
9
3M
5M
2M
SIZE
7-1/16
7-1/16 3M
5M
2M
3.438
4.063
2.813
LENGTH
2.813
3.438
LENGTH
2.500
LENGTH
APPENDIX B
TAP END STUD LENGTH TABLE FOR 6B STUDDED FLANGE CONNECTIONS WITH "R" GASKETS
(one diameter +
Point, maximum
RF
TL
P
d
S
t
T
LENGTH =
"R" TYPE GASKETS ONLY
ACCOMMODATES
1.5 Pitch ) + 1/16 - 0]
(1.5 X Pitch)
.
(with "R" gasket)
+
tolerance on tap end stud length
+
* *
inch01/8 ,
0
-
1/16 -, inch
tolerance on tap end thread length:*
* * * * * *
3.3750.761
4.3751.042
4.3751.042
3.7500.900
4.7501.188
4.7501.188
3.8750.900
4.3751.042
5.2501.313
4.3751.042
5.1251.313
5.7501.438
4.8751.188
5.6251.438
7.0001.688
5.0001.188
5.6251.313
7.2501.563
5.6251.313
6.3751.563
8.1251.813
6.1251.438
6.6251.563
9.2502.063
6.2501.438
7.0001.563
7.1251.688
8.0001.813
8.0001.813
9.6252.188
[
T + t + d + S + P + TL + RF
POINT POINT
MINIMUM
UNTHREADED
BE EQUAL TO
1 THREAD PITCH
PORTION SHALL
(D+1.5 PITCH)
LENGTH
TAP END THREAD
- 0
+1/16
(2-1/2 D)
FULL THREAD MIN.
NUT END THREAD
LENGTH
LENGTHLENGTH

Specification for stud bolts

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