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PT105881 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

PT105881: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include center_hole_diameter: 3.75 INCHES NOMINAL IN, end_item_identification: STROKE ACTUATOR, part_name_assigned_by_controlling_agency: SEAL, ROD, OD PROFILE, 3-3/4 ID. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-622-4678, 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
PT105881
NSN: 5331-01-622-4678
FSC: 5331 — O-ring
CAGE: 11859 — HUNT VALVE COMPANY, INC. (USA)
SPECIFICATIONS
center_hole_diameter3.75 INCHES NOMINAL IN
end_item_identificationSTROKE ACTUATOR
part_name_assigned_by_controlling_agencySEAL, ROD, OD PROFILE, 3-3/4 ID
NSN5331-01-622-4678
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: PT105881 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
•
CENTER HOLE DIAMETER: 3.75 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CENTER HOLE DIAMETER3.75 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL, ROD, OD PROFILE, 3-3/4 ID
END ITEM IDENTIFICATIONSTROKE ACTUATOR
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES 1
PT102216-4790 ITEM NO.67Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PT105881?
PT105881 is a O-RING.
What parts can replace PT105881?
There is 1 known substitute for PT105881: PT102216-4790 ITEM NO.67. Substitute compatibility should be verified for your specific system.
What is the NSN for PT105881?
PT105881 is cataloged in the U.S. Government catalog under NSN 5331-01-622-4678. 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.