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Technical Data Sheet
PartsTable / O-RING / 281700
281700 ✓ 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

The NUT,TUBE COUPLING,REDUCING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY CA360 OVERALL, seat_angle: 45.0 DEGREES, thread_class: 2B INTERNAL, connection_style: FLARE, style_designator: CAP, thread_direction: RIGHT-HAND INTERNAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-078-7300, 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
281700
NSN: 5331-00-078-7300
FSC: 5331 — O-RING
CAGE: 75545 — LAWLER MANUFACTURING COMPANY, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY CA360 OVERALL
seat_angle45.0 DEGREES
thread_class2B INTERNAL
connection_styleFLARE
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
operating_pressure500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
nominal_thread_size0.438 INCHES INTERNAL IN
end_item_identificationVARIOUS APPLICATIONS
thread_series_designatorUNF INTERNAL
nondefinitive_spec/std_data37 FIGURE
specification/standard_data81343-J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5331-00-078-7300
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 281700 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: 1.966 INCHES MINIMUM AND 2.002 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
OUTSIDE DIAMETER: 2.262 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.139 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER1.966 INCHES MINIMUM AND 2.002 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
OUTSIDE DIAMETER2.262 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.139 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
352250000206Interchangeable
interchangeable cross-reference
interchangeable
2817Interchangeable
interchangeable cross-reference
interchangeable
TYPE995-4574Interchangeable
interchangeable cross-reference
interchangeable
D-67500-57Interchangeable
interchangeable cross-reference
interchangeable
AS568B-226Interchangeable
interchangeable cross-reference
interchangeable
C-67500-57Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 281700?
281700 is a NUT,TUBE COUPLING,REDUCING.
What parts can replace 281700?
There are 23 known substitutes for 281700: 352250000206, 2817, TYPE995-4574 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 281700?
281700 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-078-7300. 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