Fabric Reinforced Seals Overview

Fabric Reinforced Seals (FRS) were introduced by Johns Manville in the early 1980s, and are widely known as JM Clipper® Seals. These seals found a niche in the oil seal market because of their unique semi-rigid frame and ease of installation in the field. They are used as a viable option to replace metal case oil seals in the field because the proper installation tools for metal case oil seals are not readily available.

Because Fabric Reinforced Seals are not constructed from metal, concerns with rust and corrosion are eliminated. Damage during installation is circumvented and the composite material acts more like a gasket type seal making it effective when the bore is worn. The nonmetallic construction also allows for the seal to be split, if necessary. Split versions of Fabric Reinforced Seals include a hook and eye spring, which can be detached and reattached during installation. Solid versions of Fabric Reinforced Seals have a fully threaded spring, which is removable as a whole if desired.

Product Inquiry

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Search Fabric Reinforced Seals with JM Clipper® Seal Part Numbers

As a leading supplier of Fabric Reinforced Seals, Global O-Ring and Seal has created a part interchange system covering over 5,500 variations of JM Clipper® Seals. In the general search bar at the top of any page, JM Clipper® Seal part numbers can be entered to return any matching cross-referenced parts.

In our online store, when Fabric Reinforced Seals are selected in the Product dropdown menu, the Clipper PN field allows for JM Clipper® Seal part numbers to be entered and return a cross-referenced part. Alternatively, dimensions, style, and material can be selected to further narrow selection.


For more information or to request a quote on Fabric Reinforced Seals, please give us a call at 832-448-5550 or submit the Product Inquiry Form.

Fabric Reinforced Seal Part Numbers

Fabric Reinforced Seals feature an integral molded rubber fiber outer case and an elastomeric seal lip. Some profiles are loaded with a stainless steel spring, such as the C Profile (corresponding to JM Clipper® Seal Style: LDS) shown below. We have a unique part numbering system that starts with FRS, Size #, Profile, Material (if not Nitrile), and Durometer (if not 75). The following are examples of the part numbering system used for Fabric Reinforced Seals. The top Fabric Reinforced Seal part number is a C Profile made with 75 Durometer Nitrile. The bottom Fabric Reinforced Seal part number is a C Profile made with 90 Durometer Viton®. Both part numbers are the same size with the Size # corresponding to a Shaft of 3 inches, a Bore of 4 inches, and a Width of 0.625 inches.

Size Selection

Fabric Reinforced Seal part numbers may also be found using the Oil Seal Size Chart. The interactive chart will display matching sizes as dimensional values are input for Shaft, Bore, and Width. The Oil Seal Size # is hyperlinked to our online store, which will display all sizes matching the selection.

Profile & Material Selection

The two tables below show profiles and materials, respectively. In the first table, Fabric Reinforced Seal profiles are displayed with a Global O-Ring Profile, corresponding JM Clipper® Profile(s), Profile Image, and Description. The Global O-Ring Profile always follows the Size # in the Fabric Reinforced Seal part number. In the second table, shows material and corresponding code. If the Fabric Reinforced Seal is not Nitrile, the part number will have the Material immediately following the Global O-Ring Profile.

Global O-Ring Profile Clipper Profile Profile Image Description


General purpose. Spring-loaded single lip.


Spring-loaded single lip. Designed for high runout conditions.
C LDS General purpose. Spring-loaded double lip.
D LDSW Spring-loaded double lip. Designed for high runout conditions.
E H General purpose rod wiper. Springless single lip for dust exclusion.
F SS General purpose. Springless single lip. For grease retention and dust exclusion.
G SSW General purpose. Springless single lip. For grease retention and dust exclusion.
H MIST General purpose. Spring-loaded single lip.
I SDS General purpose. Springless dual lip.
A1 STLUP Spring-loaded single lip with metal bands for shock loads.


General purpose. Spring-loaded single lip.
C1 STLDS Spring-loaded double lip with metal band for shock loads.
H1 STMIST Molded-in spring-loaded single lip with metal band for shock loads.
Material Code
Nitrile [blank]
Viton® V
Polyacrylate P
Silicone S
Neoprene C
Carboxylated Nitrile X
Teflon® (PTFE) T
Viton®/PTFE VT
Nitrile/PTFE NT
Nitrile Low Temp LT