A-A-624A
December 7, 1987
SUPERSEDING
A-A-624
November 23, 1979
COMMERCIAL ITEM DESCRIPTION
TAP, THREAD CUTTING
(REGULAR, MACHINE SCREW SIZES)
The General Services Administration has authorized the use of this
Commercial item description in preference to Type I of Federal Specification
GGG-T-70.
This commercial item description covers general purpose, ground thread, high-speed steel taps with straight flutes for use in hand and machine tapping operations.
Salient characteristics:
Design. Taps shall be of the regular hand type with straight flutes, and be in accordance with the latest revision of American National Standard ANSI B94.9.
Performance. Taps shall be capable of cutting smooth, well defined UN Form threads.
Material. Material shall be high-speed steel of the same grade used for taps supplied to the commercial market for general purpose applications.
Hardness. Taps shall be hardened and tempered so as to indicate a Rockwell C62-66 hardness in at least eighty percent of the threaded section from the threaded end. The shank and square drive and may have other suitable best treatment characteristics to prevent twisting and breaking of the tap.
Finish. Threads shall have a ground finish. Other areas shall be finished in accordance with commercial practice. Coatings or surface treatments, if provided, shall be suitable for general purpose tapping applications.
Thread size, type of chamber, pitch diameter, and number of flutes. Shall be as shown in the following table for the National Stock Number (NSN) specified. Except as indicated, threads shall be right hand direction.
|
NATIONAL STOCK NUMBER |
SIZE, SERIES, DIRECTION |
CHAMBER TYPE |
P.D. LIM. SYM. |
PITCH MIN. (INCH) |
DIAMETER MAX. (INCH) |
NUMBER OF FLUTES |
|
5136-00-189-7812 |
NO. 1-64UNC |
BOTTOMING |
H1 |
0.0629 |
0.0634 |
2 |
|
5136-00-189-7814 |
NO.1- 64UNC |
PLUG |
H1 |
0.0629 |
0.0634 |
2 |
|
5136-00-189-7814 |
NO. 1- 64UNC |
TAPER |
H1 |
0.0629 |
0.0634 |
2 |
|
5136-00-189-7818 |
NO. 0 80UNF |
BOTTOMING |
H1 |
0.0519 |
0.0524 |
2 |
|
5136-00-189-7819 |
NO. 1- 72UNF |
BOTTOMING |
H1 |
0.0640 |
0.0645 |
2 |
|
5136-00-189-7824 |
NO. 0- 80UNF |
TAPER |
H1 |
0.0519 |
0.0524 |
2 |
|
5136-00-189-7825 |
NO. 1- 72UNF |
TAPER |
H1 |
0.0640 |
0.0645 |
2 |
|
5136-00-189-7826 |
NO.2- 64UNF |
TAPER |
H1* |
0.0759 |
0.0764 |
3 |
|
5136-00-203-6212 |
NO. 10- 32UNP |
BOTTOMING |
H1 |
0.1697 |
0.1702 |
4 |
|
5136-00-203-6217 |
NO. 10- 32UNFLH |
PLUG |
H1 |
0.1697 |
0.1702 |
4 |
|
5136-00-203-6500 |
NO. 8- 32UNC |
BOTTOMING |
H1 |
0.1437 |
0.1442 |
4 |
|
5136-00-203-6501 |
NO. 10- 24UNC |
BOTTOMING |
H1 |
0.1629 |
0.1634 |
4 |
|
5136-00-203-6502 |
NO. 12- 24UNC |
BOTTOMING |
H1* |
0.1889 |
0.1894 |
4 |
|
5136-00-203-6506 |
NO. 8- 32UNC |
PLUG |
H1 |
0.1437 |
0.1442 |
4 |
|
5136-00-203-6508 |
NO. 10- 24UNC |
PLUG |
H1 |
0.1629 |
0.1634 |
4 |
|
5136-00-203-7074 |
NO. 8- 32UNC |
TAPER |
H1 |
0.1437 |
0.1442 |
4 |
|
5136-00-204-1644 |
NO. 6- 32UNC |
TAPER |
H1 |
0.1177 |
0.1182 |
3 |
|
5136-00-221-7874 |
NO. 12- 24UNC |
PLUG |
H2* |
0.1894 |
0.1899 |
4 |
|
5136-00-227-9455 |
NO. 6- 32UNC |
BOTTOMING |
H1 |
0.1177 |
0.1182 |
3 |
|
5136-00-228-0989 |
NO. 5- 44UNF |
TAPER |
H2 |
0.1107 |
0.1112 |
3 |
|
5136-00-228-1004 |
NO. 4- 48UNF |
PLUG |
H2 |
0.0990 |
0.0995 |
3 |
|
5136-00-228-1005 |
NO. 5- 44UNF |
PLUG |
H2 |
0.1107 |
0.1112 |
3 |
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business