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185S21 ✓ 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 PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, temp_rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF, hardness_rating: 85.0 SHORE DUROMETER A MINIMUM AND 91.0 SHORE DUROMETER A MAXIMUM OVERALL, rim_surface_width: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, peripheral_diameter: 2.609 INCHES MINIMUM AND 2.641 INCHES MAXIMUM IN, center_hole_diameter: 1.984 INCHES MINIMUM AND 2.016 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-260-9649, 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
185S21
NSN: 5330-00-260-9649
FSC: 5330
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
temp_rating-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
hardness_rating85.0 SHORE DUROMETER A MINIMUM AND 91.0 SHORE DUROMETER A MAXIMUM OVERALL
rim_surface_width0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
peripheral_diameter2.609 INCHES MINIMUM AND 2.641 INCHES MAXIMUM IN
center_hole_diameter1.984 INCHES MINIMUM AND 2.016 INCHES MAXIMUM IN
cross-sectional_shape_styleV
material_document_and_classificationMIL-P-5516,CL A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-260-9649
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 185S21 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
•
PERIPHERAL DIAMETER: 2.609 INCHES MINIMUM AND 2.641 INCHES MAXIMUM IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-5516,CL A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
HARDNESS RATING: 85.0 SHORE DUROMETER A MINIMUM AND 91.0 SHORE DUROMETER A MAXIMUM OVERALL
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
•
RIM SURFACE WIDTH: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: V
•
CENTER HOLE DIAMETER: 1.984 INCHES MINIMUM AND 2.016 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER2.609 INCHES MINIMUM AND 2.641 INCHES MAXIMUM IN
TEMP RATING-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-5516,CL A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING85.0 SHORE DUROMETER A MINIMUM AND 91.0 SHORE DUROMETER A MAXIMUM OVERALL
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
RIM SURFACE WIDTH0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEV
CENTER HOLE DIAMETER1.984 INCHES MINIMUM AND 2.016 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
MILP5516Interchangeable
interchangeable cross-reference
interchangeable
5330000546935Interchangeable
interchangeable cross-reference
interchangeable
AMS-P-5516Interchangeable
interchangeable cross-reference
interchangeable
200034Interchangeable
interchangeable cross-reference
interchangeable
425276-4Interchangeable
interchangeable cross-reference
interchangeable
B108A39Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 185S21?
185S21 is a PACKING,PREFORMED.
What parts can replace 185S21?
There are 26 known substitutes for 185S21: MILP5516, 5330000546935, AMS-P-5516 and 23 more. Substitute compatibility should be verified for your specific system.
Is 185S21 still available?
185S21 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026