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connects fractional tube to flared tube
BulkheadUnionANBUAN
BulkheadUnionANBUANdimdraw
Unit of Measure
1 2 3 4 

Item #

Material

T - Tube O.D.

AN - Size

AN - Thread

A

B - Hex Flat

C - Hex Flat

E Min

G

6BUAN6M N/A Monel N/A 3/8 in N/A 3/8 in N/A 9/16-18 N/A 2.31 in N/A 11/16 in N/A 3/4 in N/A .30 in N/A 1.97 in
8BUAN8M N/A Monel N/A 1/2 in N/A 1/2 in N/A 3/4-16 N/A 2.66 in N/A 7/8 in N/A 15/16 in N/A .39 in N/A 2.19 in
10BUAN10M N/A Monel N/A 5/8 in N/A 5/8 in N/A 7/8-14 N/A 2.80 in N/A 1 in N/A 1 1/16 in N/A .48 in N/A 2.36 in
12BUAN12M N/A Monel N/A 3/4 in N/A 3/4 in N/A 1 1/16-12 N/A 3.34 in N/A 1 1/8 in N/A 1 3/16 in N/A .61 in N/A 2.70 in
16BUAN16M N/A Monel N/A 1 in N/A 1 in N/A 1 5/16-12 N/A 3.72 in N/A 1 1/2 in N/A 1 9/16 in N/A .84 in N/A 3.16 in
2BUAN2HC N/A Hastelloy® C-276 N/A 1/8 in N/A 1/8 in N/A 5/16-24 N/A 1.92 in N/A 7/16 in N/A 1/2 in N/A .06 in N/A 1.61 in
2BUAN4HC N/A Hastelloy® C-276 N/A 1/8 in N/A 1/4 in N/A 7/16-20 N/A 2.08 in N/A 7/16 in N/A 1/2 in N/A .09 in N/A 1.77 in
3BUAN3HC N/A Hastelloy® C-276 N/A 3/16 in N/A 3/16 in N/A 3/8-24 N/A 2.09 in N/A 1/2 in N/A 9/16 in N/A .13 in N/A 1.78 in
4BUAN4HC N/A Hastelloy® C-276 N/A 1/4 in N/A 1/4 in N/A 7/16-20 N/A 2.16 in N/A 9/16 in N/A 5/8 in N/A .17 in N/A 1.83 in
6BUAN4HC N/A Hastelloy® C-276 N/A 3/8 in N/A 1/4 in N/A 7/16-20 N/A 2.31 in N/A 11/16 in N/A 3/4 in N/A .17 in N/A 1.97 in
6BUAN6HC N/A Hastelloy® C-276 N/A 3/8 in N/A 3/8 in N/A 9/16-18 N/A 2.31 in N/A 11/16 in N/A 3/4 in N/A .30 in N/A 1.97 in
8BUAN8HC N/A Hastelloy® C-276 N/A 1/2 in N/A 1/2 in N/A 3/4-16 N/A 2.66 in N/A 7/8 in N/A 15/16 in N/A .39 in N/A 2.19 in
10BUAN10HC N/A Hastelloy® C-276 N/A 5/8 in N/A 5/8 in N/A 7/8-14 N/A 2.80 in N/A 1 in N/A 1 1/16 in N/A .48 in N/A 2.36 in
12BUAN12HC N/A Hastelloy® C-276 N/A 3/4 in N/A 3/4 in N/A 1 1/16-12 N/A 3.34 in N/A 1 1/8 in N/A 1 3/16 in N/A .61 in N/A 2.70 in
16BUAN16HC N/A Hastelloy® C-276 N/A 1 in N/A 1 in N/A 1 5/16-12 N/A 3.72 in N/A 1 1/2 in N/A 1 9/16 in N/A .84 in N/A 3.16 in
2BUAN2600 N/A Inconel N/A 1/8 in N/A 1/8 in N/A 5/16-24 N/A 1.92 in N/A 7/16 in N/A 1/2 in N/A .06 in N/A 1.61 in
2BUAN4600 N/A Inconel N/A 1/8 in N/A 1/4 in N/A 7/16-20 N/A 2.08 in N/A 7/16 in N/A 1/2 in N/A .09 in N/A 1.77 in
3BUAN3600 N/A Inconel N/A 3/16 in N/A 3/16 in N/A 3/8-24 N/A 2.09 in N/A 1/2 in N/A 9/16 in N/A .13 in N/A 1.78 in
4BUAN4600 N/A Inconel N/A 1/4 in N/A 1/4 in N/A 7/16-20 N/A 2.16 in N/A 9/16 in N/A 5/8 in N/A .17 in N/A 1.83 in
6BUAN4600 N/A Inconel N/A 3/8 in N/A 1/4 in N/A 7/16-20 N/A 2.31 in N/A 11/16 in N/A 3/4 in N/A .17 in N/A 1.97 in
6BUAN6600 N/A Inconel N/A 3/8 in N/A 3/8 in N/A 9/16-18 N/A 2.31 in N/A 11/16 in N/A 3/4 in N/A .30 in N/A 1.97 in
8BUAN8600 N/A Inconel N/A 1/2 in N/A 1/2 in N/A 3/4-16 N/A 2.66 in N/A 7/8 in N/A 15/16 in N/A .39 in N/A 2.19 in
10BUAN10600 N/A Inconel N/A 5/8 in N/A 5/8 in N/A 7/8-14 N/A 2.80 in N/A 1 in N/A 1 1/16 in N/A .48 in N/A 2.36 in
12BUAN12600 N/A Inconel N/A 3/4 in N/A 3/4 in N/A 1 1/16-12 N/A 3.34 in N/A 1 1/8 in N/A 1 3/16 in N/A .61 in N/A 2.70 in
16BUAN16600 N/A Inconel N/A 1 in N/A 1 in N/A 1 5/16-12 N/A 3.72 in N/A 1 1/2 in N/A 1 9/16 in N/A .84 in N/A 3.16 in
Unit of Measure
1 2 3 4