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ST1946-219 — ST1946-219

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

ST1946-219: ST1946-219.

The ST1946-219 is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-01-457-5114, 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
ST1946-219
NSN: 5331-01-457-5114
FSC: 5331 — O-ring
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
Part NumberST1946-219
NSN5331-01-457-5114
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST1946-219 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
•
TEMP RATING: -20.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-83485 MIL SPEC SINGLE MATERIAL RESPONSE
•
SPECIFICATION/STANDARD DATA: 81349-MIL-R-83485/1 GOVERNMENT SPECIFICATION
•
CENTER HOLE DIAMETER: 1.284 INCHES MINIMUM AND 1.308 INCHES MAXIMUM IN
•
TEST DATA DOCUMENT: 81346-ASTM-D1414 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
TECHNICAL CHARACTERISTICS
TEMP RATING-20.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
HARDNESS RATING70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-83485 MIL SPEC SINGLE MATERIAL RESPONSE
SPECIFICATION/STANDARD DATA81349-MIL-R-83485/1 GOVERNMENT SPECIFICATION
SPECIAL FEATURESIMPROVED PERFORMANCE AT LOW TEMPERATURES
CENTER HOLE DIAMETER1.284 INCHES MINIMUM AND 1.308 INCHES MAXIMUM IN
TEST DATA DOCUMENT81346-ASTM-D1414 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
MATERIALRUBBER FLUOROCARBON CLASS FPM
SUBSTITUTES & CROSS-REFERENCES 7
AMS-R-83485/1Reference document
Same NSN cross-reference
Reference document — Secondary reference
AMS-R-83485/1-219Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
5331PL1739395Reference document
Same NSN cross-reference
Reference document — Informative reference only
M83485/1-219Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MIL-R-83485/1Reference document
Same NSN cross-reference
Reference document — Secondary reference
5331PL0658562Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST1946-219?
ST1946-219 is a ST1946-219.
What parts can replace ST1946-219?
There are 7 known substitutes for ST1946-219: AMS-R-83485/1, AMS-R-83485/1-219, 5331PL1739395 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST1946-219?
ST1946-219 is cataloged in the U.S. Government catalog under NSN 5331-01-457-5114. This indicates validated use in U.S. government and defense supply chains.
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U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.