Contact us: 1-800-588-8480 or Email sales@saeproducts.com
ISO 9001:2008 Certified
grease guns
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Grease Fitting Symbols Grease Fitting Symbols





Symbol
Meaning
N.P.T.
American Standard Taper Pipe Thread.
N.P.T.F.
Dryseal American Standard Taper Pipe Thread.
P.T.F.
Same as N.P.T.F. except full thread length has been shortened by one thread on small end of thread-also designated as P.T.F-SAE Short.
P.T.F Special Short
Same as N.P.T.F Short except one full thread has been shortened from large end of thread.
P.T.F Special Extra Short
Same as P.T.F Short except two full threads have been shortened from large end of thread.
N.P.S.F.
Dryseal American Fuel Internal Straight Pipe Thread.
N.P.S.I.
Dryseal American Intermediate Internal Straight Pipe Thread.
N.P.S.M.
American Standard Straight Mechanical Pipe Thread.
1/4"-28 Taper Thread (SAE-LT)
Thread has a 3/4" taper per foot and a pitch diameter of .2257 / .2224 at small end. The mating tapped hole is 1/4"-28U.N.F. 3B straight thread. Tap drill must not exceed .215" diameter.
1/4"-28 Special
Taper Drive Thread
Thread Forming-Forms thread in mating part during installation-when removed can be replaced by standard 1/4"-28 taper thread (SAE-LT) fitting.
1/8" Pipe Special
Taper Drive Thread
Thread Forming-Forms thread in mating part during installation-when removed can be replaced by standard 1/8"-27 P.T.F series fitting.

Symbol
Designation
Symbol
Designation
N
American Standard
S
Straight
P
Pipe
M
Mechanical
T
Taper
I
Intermediate
F
Fuel
LT
Lubrication Thread


SAE Products 1709 Husted Rd. (#4) Conway, SC 29526 - Phone:1-800-588-8480 Fax: 1-843-349-0738

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