ORFS Thread Chart - ORFS Fittings Dimensions & Sizes

ORFS Threads

SAE J1453, ISO 8434-3
ORFS is O RING FACE SEAL

ORFS system consists of ORFS Male with O Ring in Face, which seals against Flat Seated ORFS Female Swivel Nut fitting.

The Swivel Nut can be slipped back to help installation in tight situations.

The prominent position of the O Ring on the Male fitting makes it easy to inspect the condition of the O Ring.

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MALE THREAD
OD & PITCH
DASH
SIZE
MALE
THREAD OD
FEMALE
THREAD ID
TUBE
SIZE
inch – TPI   mm inch mm inch inch
9/16 – 18 UNF -09 14,3 0.56 12,9 0.51 1/4
11/16 – 16 UN -11 17,3 0.68 16,0 0.63 3/8
13/16 – 16 UN -13 20,6 0.81 19,1 0.75 1/2
1 – 14 UNS -16 25,4 1.00 23,6 0.73 5/8
1.3/16 – 12 UN -19 30,0 1.18 28,2 1.11 3/4
1.7/16 – 12 UN -23 36,3 1.43 34,3 1.35 1
1.11/16 – 12 UN -27 42,7 1.68 40,6 1.60 1.1/4
2 – 12 UN -32 51,8 2.00 48,8 1.92 1.1/2