PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 8551PC26
8551PC26 ✓ 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,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: COPPER ALLOY, design_type: THREADED, thread_class: 2B, overall_diameter: 1.875 INCHES NOMINAL IN, width_across_flats: 1.750 INCHES NOMINAL IN, inside_diameter_length: 2.000 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 5340-01-067-9987, 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
8551PC26
NSN: 5340-01-067-9987
FSC: 5340
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialCOPPER ALLOY
design_typeTHREADED
thread_class2B
overall_diameter1.875 INCHES NOMINAL IN
width_across_flats1.750 INCHES NOMINAL IN
inside_diameter_length2.000 INCHES NOMINAL IN
round_cap_outside_surface_conditionSMOOTH
thread_size_and_series/type_designator1.250-18 UNEF
NSN5340-01-067-9987
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 8551PC26 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: COPPER ALLOY
•
DESIGN TYPE: THREADED
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1.250-18 UNEF
•
WIDTH ACROSS FLATS: 1.750 INCHES NOMINAL IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
•
INSIDE DIAMETER LENGTH: 2.000 INCHES NOMINAL IN
•
THREAD CLASS: 2B
•
OVERALL DIAMETER: 1.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY
DESIGN TYPETHREADED
THREAD SIZE AND SERIES/TYPE DESIGNATOR1.250-18 UNEF
WIDTH ACROSS FLATS1.750 INCHES NOMINAL IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
INSIDE DIAMETER LENGTH2.000 INCHES NOMINAL IN
THREAD CLASS2B
OVERALL DIAMETER1.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
8551Upgraded Successor
successor cross-reference
successor
4083-5501Interchangeable
interchangeable cross-reference
interchangeable
AW-924Interchangeable
interchangeable cross-reference
interchangeable
P-551Interchangeable
interchangeable cross-reference
interchangeable
3420037Interchangeable
interchangeable cross-reference
interchangeable
C8TZ-2078-FInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 8551PC26?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 8551PC26?
8551PC26 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 8551PC26?
There are 10 known substitutes for 8551PC26: 8551, 4083-5501, AW-924 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8551PC26?
8551PC26 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-067-9987. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 8551PC26

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026