Brennan Industries hydraulic tube fitting and adapter part numbers are constructed from letters and numbers that identify the series, size, material and type of product, such as:

2501-08-08-SS
C2501-L-04-02
F0403-04-04-O

The first part of the number (including letters) represents the series number. To locate the series that includes the part numbers listed above, you would simply enter:

2501
C2501
F0403

If you are having trouble locating a particular series, use the following reference chart:

O-Ring Face Seal Fittings
FS0304-C through FS6809 including –O, -O-L and –NWO.

Tube Fittings and Adapters
0302 through 6902 including –TS, -LH, -L, -LL, -LLL, -NWO, -O, -N, -HP, -P, -SHP, -L-O, -H-O, -L, -L-NWO, -LL-NWO, and LLL-NWO.
V0318 through V0319

Flareless Bite Type Fittings
C0304 through C6804 including –C, -LH, L, -LL, -O, -L-O and -NWO.

International Fittings
7000 through 9900 including –L, –S, –F, -P, -C, -H, -NWO and –LN

NDW Technology Fittings
F0403 through F6804 including –LH, -L, -LL, -LL, -O, -L-O, -NWO, -L-NWO, -LL-NWO.

If you are unfamiliar with the Brennan line, try using the product type search which uses that to follow diagrams of parts.