A-A-1267A
|
NATIONAL STOCK NUMBER |
SIZE AND THREAD SERIES |
PITCH DIAMETER |
||
|
|
|
SYMBOL |
MINIMUM |
MAXIMUM |
|
5136-00-261-3259 |
1/4-20 UNC |
H1 |
0.2175 |
0.2180 |
|
5136-00-261-3260 |
5/16-18 UNC |
H1 |
0.2764 |
0.2769 |
|
5136-00-261-3261 |
3/8-16 UNC |
H1 |
0.3344 |
0.3349 |
|
5136-00-261-3262 |
1/4-20 UNC |
H2 |
0.2180 |
0.2185 |
|
5136-00-261-3263 |
5/16-18 UNC |
H2 |
0.2769 |
0.2774 |
|
5136-00-261-3264 |
3/8-16 UNC |
H2 |
0.3349 |
0.3354 |
|
5136-00-261-3268 |
1/4-28 UNF |
H1 |
0.2268 |
0.2273 |
|
5136-00-261-3270 |
3/8-24 UNF |
H1 |
0.3479 |
0.3484 |
|
5136-00-261-3273 |
3/8-24 UNF |
H2 |
0.3484 |
0.3489 |
|
5136-00-585-7880 |
1/4-20 UNC |
H3 |
0.2185 |
0.2190 |
|
5136-00-585-7881 |
1/4-28 UNF |
H3 |
0.2278 |
0.2283 |
|
5136-00-585-7882 |
5/16-18 UNC |
H3 |
0.2274 |
0.2279 |
|
5136-00-585-7883 |
5/16-24 UNF |
H3 |
0.2864 |
0.2869 |
|
5136-00-585-7884 |
3/8-16 UNC |
H3 |
0.3354 |
0.3359 |
|
5136-00-585-7885 |
3/8-24 UNF |
H3 |
0.3489 |
0.3494 |
|
5136-00-585-7886 |
7/16-20 UNC |
H3 |
0.3921 |
0.3926 |
|
5136-00-585-7887 |
7/16-20 UNF |
H3 |
0.4060 |
0.4065 |
|
5136-00-585-7888 |
1/2-13 UNC |
H3 |
0.4510 |
0.4515 |
|
5136-00-585-7889 |
1/2-20 UNF |
H3 |
0.4685 |
0.4690 |
|
5136-00-585-7890 |
NO/ 3-48 UNC |
H2 |
0.0860 |
0.0865 |
|
5136-00-585-7891 |
NO. 3-56 UNF |
H2 |
0.0879 |
0.0884 |
|
5136-00-585-7892 |
NO. 4-48 UNF |
H2 |
0.0990 |
0.0995 |
|
5136-00-585-7893 |
NO. 5-40 UNC |
H2 |
0.1093 |
01098. |
|
5136-00-585-7894 |
NO. 5-44 UNF |
H2 |
0.1107 |
0.1112 |
|
5136-00-585-7895 |
NO. 6-32 UNC |
H2 |
0.1182 |
0.1187 |
|
5136-00-585-7896 |
NO. 6-40 UNF |
H2 |
0.1223 |
0.1228 |
|
5136-00-585-7897 |
NO. 8-32 UNC |
H2 |
0.1442 |
0.1447 |
|
5136-00-585-7898 |
NO.8-36 UNF |
H2 |
0.1465 |
0.1470 |
|
5136-00-585-7900 |
NO. 10-24 UNF |
H2 |
0.1634 |
0.1639 |
|
5136-00-585-7901 |
NO. 10-32 UNF |
H2 |
0.1702 |
0.1707 |
|
5136-00-060-1690 |
NO. 12-24 UNC |
H3 |
0.1889 |
0.1904 |
|
5136-00-060-1691 |
NO. 12-28 UNF |
H3 |
0.1938 |
0.1943 |
* Exception to ANSI B94.9
Quality assurance provisions. Sampling for inspection shall be in accordance with MIL-STD-105, Sampling Procedures and Tables for Inspection by Attributes, except where otherwise indicated herein. The lot size shall consist of all taps with the same NSN offered for acceptance at one time. A sample unit shall be one tap.
Visual and dimensional requirements. Each sample unit shall be examined and measured for compliance with applicable requirements of ANSI B94.9, and for workmanship as specified above. The inspection level shall be S-3 with an AQL of 1.5 percent defective.
Hardness test. Hardness testing shall be in accordance with ASTM E 18. The inspection level shall be S-2 with an AQL of 1.5 percent defective.
Performance test. When specified in the contract or purchase order, a sample consisting of three taps of the same manufacturing design shall be tested to demonstrate the ability of the tap to perform in various metals.
Each tap shall be tested by tapping ten through holes into one of three metal bars or plates, each composed of a different composition (one copper alloy, one carbon steel and one corrosion-resisting steel) of the supplier’s option. The bars or plates shall have a minimum thickness equal to the major diameter of the tap, and the hole diameters shall be such as to produce a theoretical 75% thread height. Other test factors no specified shall be at the manufacturer’s option. Failure of any of the three taps produce smooth, well-defined Unified National Form threads of a size which is consistent from the first to the last tapped hole shall be considered cause for rejection of the entire preproduction sample.
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