National 7781S Seal or gasket

National 7781S is a seal or gasket in Hardware & Accessories, US catalog. Listed by National Industrial Applications, Product Specifications & Interchange Guide (Catalog No. 430i, July 2019; Federal-Mogul Motorparts).

Radial Shaft Seals

Specifications

Lip material (code as printed)

S

Shaft size

1.250

Housing bore

1.983

Seal O.D.

1.987

Seal width

0.250

Type / illustration

203

Section as printed

RADIAL SHAFT SEALS

Name taken from

the section heading, pdf page 93

Specifications from National Oil Seals & Bearings Specifications Guide (DRiV, 2021)

Shaft

1.250″ / 31.750mm

Housing bore

1.983″ / 50.370mm

Outside diameter

1.987″ / 50.470mm

Width

0.250″ / 6.350mm

Material

Nitrile

Type

203

Name taken from

the section heading, pdf page 144

About this kind of part (general, written by SearchForPart)

Seals a joint against leaks of fluid, air, water or dust. A leak at a joint or a part taken apart calls for a new one. Check size, material and the joint it seals.

When ordering, give the part number exactly as printed and its maker, and the make, model and year of the truck, trailer, reefer unit or machine (or the engine or unit serial number). SearchForPart shows fitment only as the source printed it: check it before you order.

Reference numbers

Listed by the maker as corresponding

• Listed by National as corresponding to L & S Bearing A46892S; interchange not verified by SearchForPart.
• Listed by National as corresponding to NOK AC7269E; interchange not verified by SearchForPart.
• Listed by National as corresponding to NOK AC7269E0; interchange not verified by SearchForPart.
• Listed by National as corresponding to Sealed Power N12407; interchange not verified by SearchForPart.
• Listed by National as corresponding to Sealed Power N12437; interchange not verified by SearchForPart.
• Listed by National as corresponding to Mopar T1052; interchange not verified by SearchForPart.
• Listed by National as corresponding to GMC 0704-6863; interchange not verified by SearchForPart.
• Listed by National as corresponding to Transcom Oil Seals 121982VH; interchange not verified by SearchForPart.
• Listed by National as corresponding to Chicago Rawhide CHRYS 5403; interchange not verified by SearchForPart.
• Listed by National as corresponding to Danuser Machine Work DANMA 47216428; interchange not verified by SearchForPart.
• Listed by National as corresponding to Trostel 42372S; interchange not verified by SearchForPart.
• Listed by National as corresponding to Stemco STEM 204507; interchange not verified by SearchForPart.
• Listed by National as corresponding to International 474094R91; interchange not verified by SearchForPart.
• Listed by National as corresponding to Timken 7781S; interchange not verified by SearchForPart.

Reference numbers as printed by the maker. They are not a statement that the parts are interchangeable. Confirm with the manufacturer before ordering.

Availability

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Catalog information provided by National Industrial Applications, Product Specifications & Interchange Guide (Catalog No. 430i, July 2019; Federal-Mogul Motorparts). Fitment for your equipment is not verified by this page. SearchForPart does not show a price here.