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Technical Data Sheet
PartsTable / MRO / 127921
127921 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The SWITCH,PRESSURE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SPRING END,GROUND BOTH ENDS, load_rating: 0.305 POUNDS NOMINAL LBS, bore_diameter: 0.248 INCHES NOMINAL IN, coil_quantity: 12, overall_length: 0.210 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-498-5806, 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
MRO→ MRO_GENERAL→ 127921
NSN: 5331-00-498-5806
FSC: 5331 — O-RING
CAGE: 92003 — PARKER HANNIFIN CORPORATION DIV AEROSPACE GROUP HEADQUARTERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,GROUND BOTH ENDS
load_rating0.305 POUNDS NOMINAL LBS
bore_diameter0.248 INCHES NOMINAL IN
coil_quantity12
overall_length0.210 INCHES MAXIMUM IN
hardness_rating70.0 SHORE DUROMETER A NOMINAL
inside_diameter0.190 INCHES NOMINAL IN
mounting_methodTERMINAL
terminal_length0.500 INCHES MINIMUM IN
outside_diameter3.443 INCHES NOMINAL IN
overall_diameter0.230 INCHES MAXIMUM IN
NSN5331-00-498-5806
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 127921 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: 3.213 INCHES MINIMUM AND 3.261 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 3.443 INCHES NOMINAL IN
•
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
ELONGATION PERCENTAGE: 125 MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER3.213 INCHES MINIMUM AND 3.261 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.443 INCHES NOMINAL IN
MATERIALRUBBER FLUOROSILICONE CLASS FQ
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
ELONGATION PERCENTAGE125 MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
510364REVALINE7Interchangeable
interchangeable cross-reference
interchangeable
3330209REVCPC9Interchangeable
interchangeable cross-reference
interchangeable
515294PC6Interchangeable
interchangeable cross-reference
interchangeable
2N2368Interchangeable
interchangeable cross-reference
interchangeable
12792-1Interchangeable
interchangeable cross-reference
interchangeable
M25988-1-152Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 127921?
127921 is a SWITCH,PRESSURE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 127921?
There are 13 known substitutes for 127921: 510364REVALINE7, 3330209REVCPC9, 515294PC6 and 10 more. Substitute compatibility should be verified for your specific system.
Is 127921 still available?
127921 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