Zerk & Lubrication Fittings

grease

Grease fittings, also known as a Zerk fitting, are metal fittings for mechanical systems to that they can feed lubricants into various bearings using a grease gun with medium to high pressure. Aetna offers a complete line of lubrication fittings with various grease zerk sizes that are designed for heavy industrial uses. They are used by industries, such as material handling, automotive, heavy truck, conveyer & mining.

Zerk & Lubrication Fitting Capabilities

Aetna's grease fittings are made of case hardened steel and are heavily zinc plated for maximum corrosion resistance and are manufactured to exacting specifications. Our zerk fittings meet or exceed all commercial standards, conform with SAE Specification J-5343 and Military Specification F-3541, and are available in standard and metric sizes.

zinc plated grease fitting zerk fitting

AETNA PART NO.DescriptionABCDEFGHINTERCHANGEABLE PART NUMBERS
Alemite GM American Lube LINCOLN
5540000 1/8" PTF Airvent 25/32 17/64 13/16 .400 1/8 PTF 7/16 - Str. 301370 271420   5698
5546006 1/8" PTF-SS 11/16 9/32 3/16 13/32 1/8 PT 7/16 - Str. 1610-BL 9411010 T-7000 5000
5546010 1/8" PTF-SS 1-1/4 3/4 - .400 1/8 PT 7/16 - Str. 1607-BG 271281 / 9411011 T-7003 5003
5546017 1/8" PTF-SS 7/8 19/64 7/32 13/32 1/8 PT 7/16 27/64 45¡ 1688-B 271283 / 9411016 T-7008 5200
5546018 1/8" PTF-SS 27/32 19/64 7/32 13/32 1/8 PT 7/16 1/2 65¡ 1612-B 271284 / 9411017 T-7010 5300
5546026 1/8" PTF-SS 27/32 19/64 7/32 13/32 1/8 PT 7/16 33/64 90¡ 1613-B 271285 / 9411019 T-7013 5400
5546052 1/8" PSTDT 5/8 15/64 - .400 1/8 PTF 7/16 - Str. 1720-B 273321 / 9411025   205000
5546056 1/8" PSTDT 49/64 13/64 - .400 1/8 PTF 7/16 17/32 90¡ 1723-B 273324 / 9411025 T-7302 205400
5546030 1/4"-28 TT-SEA-LT 35/64 13/64 7/64 1/4 1/2-28 5/16 - Str. 1641-B 271287 / 9411027 T-7201 5010
5546032 1/4"-28 TT-SEA-LT 11/16 23/64 13/64 1/4 1/4-28 5/16 - Str. 1652-B 273326 / 9411028 T-7202 5013
5546034 1/4"-28 TT-SEA-LT 31/32 5/8 13/64 .260 1/4-28 5/16 - Str. 1680-B 271228 / 9411029 T-7203 5014
5546044 1/4"-28 TT-SEA-LT 49/64 13/64 5/32 1/4 1/4-28 3/8 1/2 90¡ 1911-B 274510 / 9411032 T-7208 5410
5546064 3/16" Drive Type 33/64 15/64 - 3/16 - 5/16 - Str. 1728-B - T-7605 5033
5546084 1/4" Drive Type 15/16 19/64 - .260 1/4-28 3/8 25/64 45¡ 1744-BI - T-7614 5318
5546000 5/16" Drive Type 21/64 9/32 - - - - - Str. 1814 -    
5546106 1/4-28 UNF-2A 31/64 9/64 - .250 1/4-28 9/32 - Str. 1792-B 271291 / 9411244   5527
5546029 6 x 1 Metric 35/64 3/16 5/32 15/64 M6X1 7mm - Str. 2106 - T-7402 5175
SymbolsDefinitions
PTF Dry seal American Standard Taper Pipe Thread, where full thread length has been shortened by one thread on small end.
PTF-SS Same as PTF except on full thread has been shortened from large end of thread.
PSTDT 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" PTF series fitting.
TT-SEA-LT 1/4" Taper Thread (SEA-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"-28 UNF-3B straight thread. Tap drill must not exceed .215" diameter.
AETNA/LINCOLN PART NUMBERNational Stock Number (NSN)Military Standard Number
5010 4730-00-050-4203 MS15001-1
5014 4730-00-172-0001 MS15001-2
5410 4730-00-050-4207 MS15001-4
5000 4730-00-050-4208 MS15003-1
5003 4730-00-172-0022 MS15003-2
5200 4730-00-172-0028 MS15003-4
5300 4730-00-172-0031 MS15003-5
5400 4730-00-172-0034 MS15003-6

fittiong

Nominal Pipe Thread SizeThreads Per InchMajor Dia. B or CNominal Engagement for Tight Joint A
1/8" 27 .405" 1/4"
1/4" 18 .540" 3/8"
3/8" 18 .675" 3/8"
1/2" 14 .840" 1/2"
3/4" 14 1.050" 9/16"
1" 11/1/02 1.315" 11/16"
Fitting Thread SizeTap Drill Selection For Standard Thread FittingsDrill Size Selection for Spin Drive Fittings
1/4"-28 #3 (for soft metal use #5) "A" - .234" Dia.
5/16"-32 9/32" (for soft metal use "J") -
1/8" Pipe 11/32" (for soft metal use "R") 3/8 - .375" Dia.*
1/4" Pipe 7/16" -
fitting depth When selecting a lubrication fitting (straight, angle, standard thread, spin drive or straight drive) be sure to measure engagement depth "A", taking manufacturing tolerance into consideration. Then select fitting with thread length or drive shank length that will not penetrate bearing material or rest against rotating member.
The turning radius is given for all angle fittings shown on these pages. Take this into consideration during initial machine design, and select a fitting with a turning radius that will permit easy production line installation.
When deep set fittings are required, make sure there is sufficient clearance for easy disengagement of hydraulic coupler.
Lincoln hydraulic couplers and fittings are designed to provide angle up to 15°.Movement beyond this angle will cause coupler to disengage.

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