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Technical Data Sheet
PartsTable / COMPONENT / 9891-091PC7
9891-091PC7 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, length_under_shoulder: 1.000 INCHES NOMINAL IN, open_end_inside_diameter: 2.922 INCHES NOMINAL IN, closed_end_overall_diameter: 2.720 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-298-9112, 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
9891-091PC7
NSN: 5340-00-298-9112
FSC: 5340
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialPLASTIC
length_under_shoulder1.000 INCHES NOMINAL IN
open_end_inside_diameter2.922 INCHES NOMINAL IN
closed_end_overall_diameter2.720 INCHES NOMINAL IN
NSN5340-00-298-9112
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9891-091PC7 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: PLASTIC
•
OPEN END INSIDE DIAMETER: 2.922 INCHES NOMINAL IN
•
CLOSED END OVERALL DIAMETER: 2.720 INCHES NOMINAL IN
•
LENGTH UNDER SHOULDER: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC
OPEN END INSIDE DIAMETER2.922 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER2.720 INCHES NOMINAL IN
LENGTH UNDER SHOULDER1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
D172139Interchangeable
interchangeable cross-reference
interchangeable
100 718 980Interchangeable
interchangeable cross-reference
interchangeable
541B0A6VInterchangeable
interchangeable cross-reference
interchangeable
45AInterchangeable
interchangeable cross-reference
interchangeable
5410D6VInterchangeable
interchangeable cross-reference
interchangeable
45ABRACKETInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9891-091PC7?
9891-091PC7 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace 9891-091PC7?
There are 20 known substitutes for 9891-091PC7: D172139, 100 718 980, 541B0A6V and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9891-091PC7?
9891-091PC7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-298-9112. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026