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634931 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

634931: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 CASE, end_item_identification: PUMP ASSY CTFGL;USN FRM 0150LB 8X10-13,12.23IMP W/180 SEAL LBS, part_name_assigned_by_controlling_agency: SEAL,LABYRINTH ROTOR. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-494-0526, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
634931
NSN: 5330-01-494-0526
FSC: 5330 — Packing and Gasket Materials
CAGE: 07524 — DOVER PUMPS & PROCESS SOLUTIONS SEGMENT INC DBA BLACKMER DIV BLACKMER (USA)
SPECIFICATIONS
materialSTEEL COMP 316 CASE
end_item_identificationPUMP ASSY CTFGL;USN FRM 0150LB 8X10-13,12.23IMP W/180 SEAL LBS
part_name_assigned_by_controlling_agencySEAL,LABYRINTH ROTOR
NSN5330-01-494-0526
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 634931 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL COMP 316 CASE
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL,LABYRINTH ROTOR
END ITEM IDENTIFICATIONPUMP ASSY CTFGL;USN FRM 0150LB 8X10-13,12.23IMP W/180 SEAL LBS
MATERIALSTEEL COMP 316 CASE
MATERIALRUBBER SYNTHETIC INNER RING
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 3
1801490 ITEM NO 89EReference document
Same NSN cross-reference
Reference document — Secondary reference
1801490 ITEM NO.89B,89EReference document
Same NSN cross-reference
Reference document — Secondary reference
1801490 ITEM NO 89BReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 634931?
634931 is a SEAL,PLAIN ENCASED.
What parts can replace 634931?
There are 3 known substitutes for 634931: 1801490 ITEM NO 89E, 1801490 ITEM NO.89B,89E, 1801490 ITEM NO 89B. Substitute compatibility should be verified for your specific system.
What is the NSN for 634931?
634931 is cataloged in the U.S. Government catalog under NSN 5330-01-494-0526. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.