Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW
The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROSILICONE CLASS FQ, center_hole_diameter: 3.581 INCHES MINIMUM AND 3.637 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM 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 5331-01-005-3218, 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
MIL-R-25988/4
NSN:5331-01-005-3218 FSC:5331 — O-RING CAGE:81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
material
RUBBER FLUOROSILICONE CLASS FQ
center_hole_diameter
3.581 INCHES MINIMUM AND 3.637 INCHES MAXIMUM IN
cross-sectional_height
0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN
5331-01-005-3218
COMPONENT DIAGRAM
KEY FEATURES
•
TEMP RATING: -90.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.302 INCHES MINIMUM AND 1.334 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
HARDNESS RATING: 80.0 SHORE DUROMETER A NOMINAL
•
CENTER HOLE DIAMETER: 1.102 INCHES MINIMUM AND 1.122 INCHES MAXIMUM IN
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FREQUENTLY ASKED QUESTIONS
What is MIL-R-25988/4?
MIL-R-25988/4 is a O-RING.
What parts can replace MIL-R-25988/4?
There are 29 known substitutes for MIL-R-25988/4: 100-534-8800, 5605-5815-001, 100-534-8809 and 26 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-R-25988/4?
MIL-R-25988/4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-005-3218. This indicates validated use in U.S. government and defense supply chains.
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