Technical Information

3000/8000 Series Race Hose Ends Comparison

WHERE ENGINEERING COUNTS! Hose ends may look like simple devices, but at FPS they take them very seriously. They have spent several years research- ing, testing and retesting to perfect the production of what they feel is the finest hose end available. Period! They hope that you will agree. All Fragola Performance Systems Hose Ends are manufactured from aerospace-quality aluminum and machined to mil spec tolerances.

3000 Series Race Hose Ends 8000 Series Race Hose Ends
Unique ONE-PIECE design eliminates two brazed joints, minimizing potential leakage, improving flow and appearance. Unique ONE-PIECE design eliminates two brazed joints, minimizing potential leakage, improving flow and appearance.
Two Viton “O” rings form a redundant seal to ensure no-leak service for the life of the part and are impervious to fuel, oil and coolant. The correct A-N specified “J-Thread” for ease of installation and trouble-free reuse.
Stainless steel lock wires to prevent galling and provide long service. Lightweight polymer cap provides positive stop for hose installation, and covers cut end of the hose.
Wider wrenching surface for a no-slip installation. Hose barb dimensions per S.A.E. standards.
Tapered nipple for easy alignment and installation. Bright dip anodizing for a show quality finish. All Push-Lite hose ends are manufactured from aerospace-quality aluminum and machined to mil spec tolerances.
J gauge threads for increased strength and durability. Tapered nipple for easy alignment and installation.
Bright dipped anodizing for a show quality finish.
Improved entry angle on the socket, allows for easy installation.
NPT Threads

Use the profiles below to determine the correct NPT thread before ordering. The corresponding chart displays the pipe thread size, the number of threads per inch, the inner diameter of the fitting, and the closest AN thread.

Pipe Thread Size Threads Per Inch Fitting I.D. Closest AN fitting size
1/8" 27 1/8" 4
1/4" 18 1/4" 6
3/8" 18 3/8" 8
1/2" 14 1/2" 10
3/4" 14 3/4" 12
1" 11.5 1" 16
1 1/4" 11.5 1 1/4" 20
A-N Threads

Use the profiles below to determine the correct A-N thread before ordering. The corresponding chart displays the outer diameter of the metal tube and thread size.

A-N Size Metal Tube O.D. Thread Size
3 3/16" 3/8-24 UNJF
4 1/4" 7/16-20 UNJF
6 3/8" 9/16-18 UNJF
8 1/2" 3/4-16 UNJF
10 5/8" 7/8-14 UNJF
12 3/4" 1 1/16-12 UNJF
16 1" 1 5/16-12 UNJF
20 1 1/4" 1 5/8-12 UNJF
Torque Specifications

Many people over tighten the aluminum fitting on the adapter, which distorts the 37 degree seat, and may cause leakage. Both the threads and the seat surface should have a drop or two of oil to smooth the tightening process. The maximum torque specifications are listed here. (An alternate method of tightening is to bring the nut to “hand-tight” and then rotate it another turn with the proper wrench.)

Fitting Size Max. Torque in Foot Pounds
3 8.75
4 11.5
6 16.25
8 29
10 35
12 45
16 70
20 85
Size Chart
A-N Thread Pipe ThreadB-Nut Hex
A-N SizeTube DiameterThread Size (S.A.E.)Pipe ThreadThreads Per InchA-N SizeHex Diameter
-21/8"5/16-241/16"27
-33/16"3/8-241/8"27#31/2"
-41/4"7/16-201/4"18#49/16"
-63/8"9/16-183/8"18#611/16"
-81/2"3/4-161/2"14#87/8"
-105/8"7/8-143/4"14#101"
-123/4"1 1/16-121"11#121 1/4"
-161"1 5/16-12#161 1/2"
-201 1/4"1 5/8-12#201 7/8"
-241 1/2"1 7/8-12
-281 3/4"2 1/4-12
-322"2 1/2-12