DETAIL SPECIFICATION SHEET
NUT, UNION
INCH-POUND · AN805 Rev 8 · 4 August 2011 · Superseding AN805 Rev 7, 14 August 1956 · AMSC N/A · FSC 4730
FIGURE 1. Nut, union.
TABLE I. Dash numbers and size. 1/ 2/
| Dash number | Tubing outside diameter | Thread T MIL-S-7742 |
A ±.015 |
B | C Diameter (dia.) |
D Reference |
E ±.015 |
F Dia. |
G Dia. |
H +.004 -.000 Dia. |
J Diameter |
K | L | P Pitch dia. |
Q Reference |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brass | Corrosion resistant steel | |||||||||||||||
| 2 | C2 | .125 | .3125-32 UNEF-3A | .438 | .375 | .375 | .344 | .312 | .375 | .173 | .279 +.004 -.000 | .281 | .234 | .43 | ||
| 3 | C3 | .188 | .3750-24 UNF-3A | .500 | .438 | .438 | .406 | .375 | .438 | .257 | .330 +.006 -.000 | .328 | .281 | .51 | ||
| 4 | C4 | .250 | .4375-20 UNF-3A | .500 | .562 | .531 | .156 | .250 | .438 | .500 | .316 | .385 +.005 -.000 | .375 | .312 | .65 | |
| 5 | C5 | .312 | .5000-20 UNF-3A | .531 | .625 | .594 | .281 | .531 | .594 | .379 | .447 +.006 -.000 | .406 | .344 | .72 | ||
| 6 | C6 | .375 | .6250-18 UNF-3A | .562 | .750 | .719 | .188 | .625 | .719 | .473 | .565 +.008 -.000 | .438 | .375 | .87 | ||
| 8 | C8 | .500 | .7500-16 UNF-3A | .688 | .875 | .844 | .219 | .344 | .750 | .875 | .598 | .682 +.008 -.000 | .531 | .438 | 1.01 | |
| 10 | C10 | .625 | .9375-14 NS-3 | .812 | 1.062 | 1.062 | .250 | .438 | .938 | 1.062 | .719 | .848 +.004 -.000 | .625 | .531 | .8911 +.0036 -.0000 | 1.23 |
| 12 | .750 | 1.1250-12 UNF-3A | .875 | 1.250 | 1.250 | .531 | 1.062 | 1.250 | .863 | 1.305 +.009 -.000 | .729 | .625 | 1.44 | |||
| 16 | 1.000 | 1.5000-12 UNF-3A | 1.000 | 1.750 | 1.688 | .312 | .562 | 1.5 | 1.750 | 1.140 | 1.410 +.009 -.000 | .750 | 2.02 | |||
TABLE I. Dash numbers and size – Continued. 1/ 2/
| Dash number | Tubing outside diameter | Thread T MIL-S-7742 |
A ±.381 |
B | C Diameter (dia.) |
D Reference |
E ±.381 |
F Dia. |
G Dia. |
H +.102 -.000 Dia. |
J Diameter |
K | L | P Pitch dia. |
Q Reference |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brass | Corrosion resistant steel | |||||||||||||||
| 2 | C2 | 3.175 | .3125-32 UNEF-3A | 11.125 | 9.525 | 9.525 | 8.738 | 7.925 | 9.525 | 4.394 | 7.087 +.1016 -.000 | 7.137 | 5.944 | 10.922 | ||
| 3 | C3 | 4.775 | .3750-24 UNF-3A | 12.700 | 11.125 | 11.125 | 10.312 | 9.525 | 11.125 | 6.528 | 8.386 +.1524 -.000 | 8.331 | 7.137 | 12.954 | ||
| 4 | C4 | 6.350 | .4375-20 UNF-3A | 12.700 | 14.275 | 13.487 | 3.962 | 6.350 | 11.125 | 12.700 | 8.026 | 9.779 +.127 -.000 | 9.525 | 7.925 | 16.510 | |
| 5 | C5 | 7.925 | .5000-20 UNF-3A | 13.487 | 15.875 | 15.088 | 7.137 | 13.487 | 15.088 | 9.627 | 11.354 +.1524 -.000 | 10.312 | 8.738 | 18.288 | ||
| 6 | C6 | 9.525 | .6250-18 UNF-3A | 14.275 | 19.050 | 18.263 | 4.775 | 15.875 | 18.263 | 12.014 | 14.351 +.2032 -.000 | 11.125 | 9.525 | 22.098 | ||
| 8 | C8 | 12.700 | .7500-16 UNF-3A | 17.475 | 22.225 | 21.438 | 5.563 | 8.738 | 19.050 | 22.225 | 15.189 | 17.323 +.2032 -.000 | 13.487 | 11.125 | 25.654 | |
| 10 | C10 | 15.875 | .9375-14 NS-3 | 20.625 | 26.975 | 26.975 | 6.350 | 11.125 | 23.825 | 26.975 | 18.263 | 21.539 +.1016 -.000 | 15.875 | 13.487 | 22.6339 +.09144 -.0000 | 31.242 |
| 12 | 19.050 | 1.1250-12 UNF-3A | 22.225 | 31.750 | 31.75 | 13.487 | 26.975 | 31.750 | 21.920 | 33.147 +.2286 -.000 | 18.263 | 15.875 | 36.576 | |||
| 16 | 25.400 | 1.5000-12 UNF-3A | 25.400 | 44.450 | 42.875 | 7925 | 14.275 | 38.100 | 44.450 | 28.953 | 35.814 +.2286 -.000 | 19.050 | 51.308 | |||
1/ Dimensions are in inches
2/ Metric equivalents are given for information only.
REQUIREMENTS
Dimensions. See table I. Unless otherwise specified tolerances on decimals are ±.010, angles ±0.5°.
Configuration. See figure 1.
Inactive for new design. Dash numbers 12 and 16 are inactive for new design.
Dash numbers 2, 3 and 4 are inactive for new design except for use in oxygen systems and engine primer lines.
Dash numbers 5, 6, 8 and 10 are inactive for new design and are not to be used on engine primer lines.
Materials: Brass; bars, shapes or forgings. Corrosion – resistant steel; bars, shapes or forgings. See procurement specification.
Finish: See procurement specification.
Identification of product. Add P before the dash number for cadmium – plated brass nipple.
PART IDENTIFICATION NUMBER (PIN) SPECIFICATION
Identification of product: Add P before the dash number for cadmium – plated brass nipple.
Example of Part or Identifying Number (PIN): AN805-4 nut – union, brass, for .250 tubing OD.
AN805P4 nut – union, brass, cadmium plated, for .250 tubing OD.
AN805C4 nut – union, corrosion resistant steel, for .250 tubing OD.
GENERAL GUIDANCE
Workmanship. Break all sharp edges and remove all hanging burrs and slivers which might become dislodged under usage.
Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.