STEMCO HUB CAPS

THE INDUSTRY LEADER, PROVIDING

PROVEN PROTECTION AND EXCEPTIONAL
VALUE FOR EVERY FLEET

Making the Roadways Safer® an EnPro Industries company

 Innovative Product Line
Product- and application-specific technology
INNOVATIVE DESIGNS AND SUPERIOR designed to eliminate contaminants and
extend wheel end life. STAMPED STEEL HUB CAPS GREASE HUB CAPS
MATERIALS ENSURE SAFETY AND DURABILITY Superior Materials STEMCO Stamped Steel grease hub caps are manufactured from For grease applications, the 342 series Dirt Exclusion hub caps provide
STEMCO® has provided the trucking industry with reliable hub caps for more than 60 years. Cast aluminum to dissipate heat. 14-gauge steel and have a protective yellow chromate plating the same 340 casting without a side fill plug, plus a solid window with
Throughout our history, we have recognized the need for tougher, long-lasting hub caps that meet with a clear lacquer coating for additional protection from corrosion. a sintered metal vent for venting purposes. To further support grease
Numerous Lubricant Options For synthetic-base grease, use the vented 340-5096 version cap. wheel ends, STEMCO developed the 352 series Solid Aluminum hub
the performance, design and price requirements related to selecting the right hub cap for any fleet. Oil, semi-fluid grease, and hard-pack grease For petroleum-base grease, use the non-vented 340-5097 cap. caps with a duckbill vent inserted in the face of a solid hub cap.
To meet that need, STEMCO has engineered a menu of hub cap options designed to meet the hub caps to meet performance, design and
varying performance expectations of each fleet, all in an effort to maximize performance and value. price requirements of today’s fleets worldwide.
WITH WHEEL END INTEGRITY AND DOWN TIME ON THE LINE, DO NOT ACCEPT LESSER Broad Application Coverage
QUALITY IMITATIONS OR KNOCK OFFS. TRUST THE EXPERTS, TRUST STEMCO. Full-line coverage for trailer and tractor applications.

340-0044 340-5096 340-5097 352-4009 342-4009

Steer Trailer Trailer Trailer Trailer

TRADITIONAL HUB CAPS

INFLATION HUB CAPS DEFENDER™ HUB CAPS HUBODOMETER ® HUB CAPS
The traditional aluminum series 340 and 343 provide durability with the trademark red plug to allow venting of the hub cap. Using cast aluminum for constructing the
hub cap body prevents warpage and provides superior durability and heat-dissipation properties. The trucking industry recognizes STEMCO hub caps as the benchmark. STEMCO tire inflation hub caps are The Defender hub cap is 100% corrosion- STEMCO Hubodometer hub caps provide ease
available in both oil and grease for free, with stainless steel reinforcement and convenience when installing our mechanical
several popular applications. The oil hub inserts. It achieves longer wheel-end life or electronic DataTrac® Hubodometers. The 347
caps have a side fill plug and a standard using a magnetic plug that pulls abrasive series aluminum hub cap is mounted with a hubo
window with oil fill lines. The grease material away from critical components. window while the 640 series is a full grilamid
hub caps do not have a side fill plug An exception chemical bond between the Hubodometer hub cap with a metallic flange.
and incorporate a gray opaque window hub cap and window ensures a strong Both allow for mounting of the Hubodometer
343-4024 343-4046 343-4065 343-4095 343-4249 346-5110 with no markings. seal and no leaks. directly through the center of the hub cap.
Steer Steer Steer Steer Steer Steer

343-4370 831-0212 368-4195 363-4009 366-4024 347-4009 640-0001

340-4119 340-4975 343-4009 343-4064 343-4075 343-4342 PSI™ Aeris® Trailer Trailer Steer Trailer Trailer
Drive Trailer Trailer Trailer Trailer Trailer

POPULAR HUB CAP OPTIONS WITH BOLT SPECIFICATIONS

SENTINEL® HUB CAPS
LEGEND

Integrated Sentinel®
Standard Hub Cap,
POPULAR

Standard Hub Cap,

Standard Hub Cap,

Sentinel® Hub Cap

Sentinel® Hub Cap

Sentinel® Grease
Grease / Vented
Sentinel Technology provides an unmatched filtering system to eliminate contamination of lubricant from grime,

Number of Bolts
Solid Aluminum
Dirt Exclusion,
340/360 - No Pipe Plug

Hubo Window
Part Number
Stemco Base
dirt or water. STEMCO provides four options to put Sentinel Technology to work for you: REPLACEMENT

Defender™

Defender™

Defender™

Defender™
No Side Fill

Integrated

Bolt Circle
342 - Dirt Exclusion Grease

Bolt Size
Hub Cap

Hub Cap

Hub Cap

Hub Cap
PARTS

Side Fill
Grease

Grease
• The Sentinel hub cap provides a tamper-proof system for maximum protection and maintenance-free performance. 343/363 - With Pipe Plug

Oil
348 - Sentinel ® Oil
• Integrated Sentinel hub caps integrate the Sentinel features into the window with fewer components and greater 340 360 342 343 363 347 348 349 352 356 366 358 368
• 359-5995 349 - Sentinel ® Grease
wheel end visibility. 4009 Oil Window Kit 4009 X X X X X X X X X X X X X 5-1/2 5/16 6
4013 X X X X X X X X 5-1/2 5/16 5 350 - W ith ESP Sentinel ® Plug
• The Sentinel ESP (Extended Service Plug) and Sentinel ESP Filtered Drive Axle Vent allow economical retrofitting • 359-5990 4024 X X X X X X X X 4-1/2 5/16 6 353 - W
 ith ESP Sentinel ® Plug
of wheel ends and drive axles with the benefits of STEMCO’s exclusive Sentinel Technology. Large Red 4046 X X X X X X 5-1/2 5/16 6 356/366 - S entinel ® Oil - Integrated
Rubber Plug 4075 X X X X X X X X 6-1/4 x 8 UN(M) 358/368 - S entinel ® Grease Integrated
4095 X X X X X X X X 5-1/2 5/16 6
• 359-5915 349 - Sentinel ® Grease
4195 X X X X X X X X X X X X X 6-3/4 5/16 6
Small 3/4" Red 4249 X X X 5-1/2 5/16 6 4009 - Tapered Spindle “TN”
Rubber Plug 4281 X X 5-17/32 3/8 6 4195 - Parallel Spindle “TP”
4370* X X 5-1/2 5/16 6
359-6125
ESP Plug 4371* X X 6-1/4 x 8 UN(M)
348-4009 356-4009 353-4009 359-6124 359-6137 4372* X X 6-3/4 5/16 6
Trailer Trailer Trailer Blister Pack (2/pk) Drive Axle Vent *PSI
HUB CAP CROSSOVER
COMPETITIVE COMPETITOR’S STEMCO COMPETITIVE COMPETITOR’S STEMCO COMPETITIVE COMPETITOR’S STEMCO
PART NO. NAME PART NO. PART NO. NAME PART NO. PART NO. NAME PART NO.
1282 SKF 340-4975 1801 SKF 347-4013 C43-4042 SKF 343-4042
1612 SKF 343-4024 1811 SKF 343-4024 C43-4075 SKF 343-4075
1612 SKF 360-4024 1823 SKF 343-4042 C43-4095 SKF 343-4095
1612 SKF 361-4024 1742 SKF 343-4013 C43-4098 SKF 343-4098
1612 SKF 363-4024 1843 SKF 343-4009 C43-4249 SKF 343-4249
1612 SKF 364-4024 1843 SKF 343-4046 DG-5/6P Dual Dynamics 340-4013
1612 SKF 366-4024 1843 SKF 343-4095 DG-5/6PS Dual Dynamics 343-4013
1612 SKF 367-4024 1865 SKF 343-4066 DG-6F Dual Dynamics 340-4046
1612 SKF 369-4024 1870 SKF 343-4034 DG-6F4.5 Dual Dynamics 340-4024
1623 SKF 343-4066 1890 SKF 343-4249 DG-6F4.5P Dual Dynamics 343-4013
1627 SKF 343-4019 340-009 National 340-4009 DG-6F4.5PC Dual Dynamics 343-4024
1642 SKF 343-4013 340-009BK National 300-4009 DG-6F4.5S Dual Dynamics 347-4075
1643 SKF 343-4009 340-975 National 340-4975 DG-6FL Dual Dynamics 340-4249
1643 SKF 360-4009 340-975BK National 340-4975 DG-6FP Dual Dynamics 347-4009
1643 SKF 361-4009 343-009 National 343-4009 DG-6FPC Dual Dynamics 340-4024
1643 SKF 363-4009 343-009BK National 303-4009 DG-6P Dual Dynamics 340-4009
1643 SKF 364-4009 401911P Mechanex/Barrier 340-4975 DG-6PS Dual Dynamics 343-4009
1643 SKF 366-4009 506085 Eaton 343-4024 DG-6PSC Dual Dynamics 340-4046
1643 SKF 367-4009 506089 Eaton 343-4249 DG-7.5P Dual Dynamics 340-4195
1643 SKF 368-4009 64002 TriSeal 343-4019 DG-7.5PS Dual Dynamics 343-4195
1643 SKF 369-4009 64009 TriSeal 343-4009 DG-P Dual Dynamics 340-4075
1665 SKF 343-4042 64009H TriSeal 347-4009 DG-PS Dual Dynamics 343-4075
1681 SKF 343-4186 64013 TriSeal 343-4013 DG-PSC Dual Dynamics 343-4249
1682 SKF 343-4075 64024 TriSeal 343-4024 H075 National 343-4075
1696 SKF 343-4195 64029 TriSeal 343-4186 HS1643 Mechanex/Barrier 343-4249
1696 SKF 360-4195 64034 TriSeal 343-4034 HU009A National 343-4009
1696 SKF 361-4195 64042 TriSeal 343-4024 HU009A National 343-4046
1696 SKF 363-4195 64046 TriSeal 343-4046 HU013A National 343-4013
1696 SKF 364-4195 64046 TriSeal 343-4095 HU019A National 343-4019
1696 SKF 366-4195 64046 TriSeal 343-4249 HU024A National 343-4024
1696 SKF 367-4195 64066 TriSeal 343-4066 HU028A National 343-4186
1696 SKF 368-4195 64075A TriSeal 343-4075 HU034A National 343-4034
1696 SKF 369-4195 64075G TriSeal 342-4075 HU042A National 343-4042
1703 SKF 343-4249 64075P SKF 340-4975 HU066A National 343-4066
1711 SKF 343-4024 64249 SKF 343-4249 HU110A National 343-4095
1723 SKF 343-4066 812928 SKF 343-4095 HU110A National 343-4249
1727 SKF 343-4019 815214 SKF 343-4195 P411601 Mechanex/Barrier 343-4009
1742 SKF 343-4013 821338 SKF 343-4009 P411605 Mechanex/Barrier 343-4095
1743 SKF 343-4009 821907 SKF 343-4009 P411605 Mechanex/Barrier 343-4249
1743 SKF 343-4046 C40-4009 SKF 340-4009 P411608 Mechanex/Barrier 343-4013
1743 SKF 343-4095 C40-4009BP SKF 300-4009 P411620 Mechanex/Barrier 343-4066
1753 SKF 343-4249 C40-4975 SKF 340-4975 P411622 Mechanex/Barrier 343-4042
1765 SKF 343-4042 C40-4975BP SKF 340-4975 P411629 Mechanex/Barrier 343-4186
1770 SKF 343-4034 C40-5097BP SKF 340-5097 P411630 Mechanex/Barrier 343-4024
1781 SKF 343-4186 C43-4009 SKF 343-4009 P411640 Mechanex/Barrier 343-4034
1788 SKF 343-4249 C43-4009BP SKF 303-4009 P411655 Mechanex/Barrier 343-4075
1800 SKF 347-4009 C43-4013 SKF 343-4013 P411688 Mechanex/Barrier 343-4095
C43-4024 SKF 343-4024 P411967 Mechanex/Barrier 343-4046

HUB CAP TORQUE SPECS

THREADED HUB CAPS HUB CAP MOUNTING BOLTS HUB CAP COMPONENTS
XXX-4075 100 ft/lbs 1/4" 8-12 ft/lbs 5/8" 22-26 ft/lbs 359-6032 #8 Torx Screw 18-23 in/lbs
340-4975 50-60 ft/lbs 5/16" 12-16 ft/lbs 3/4" 24-28 ft/lbs 359-5984 3/8" Mag Plug 5-9 ft/lbs
340-4976 50-60 ft/lbs 3/8" 16-20 ft/lbs 7/8" 26-30 ft/lbs 359-5985 3/8" Pipe Plug 5-9 ft/lbs
640-0003 50-60 ft/lbs 7/16" 18-22 ft/lbs 6MM 8-12 ft/lbs
1/2" 20-24 ft/lbs 8.5MM 12-16 ft/lbs

Making the Roadways Safer® STEMCO, Aeris, DataTrac, Defender, Hubodometer,

PSI and Sentinel are trademarks of STEMCO Products Inc.
© 2018 STEMCO Products Inc. Printed in the USA.
United States | 800-527-8492 | 903-758-9981 Mexico | 444-804-1736 Part No. 571-3185 | Rev. 3/18
300 Industrial Boulevard Eje Central Sahop No 215, Zona Ind
Longview, Texas 75602 | US San Luis Potosi SLP 78395 | Mexico
Canada | 877-232-9111 | 905-206-9700 Australia | 011-61-2-9793-2599
5775 McLaughlin Road Unit 6 CNR Rookwood & Muir Roads
Mississauga, Ontario L5R 3P7 | Canada Yagoona NSW 2199 | Australia

stemco.com an EnPro Industries company