PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 371-8503-000
371-8503-000 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: COTTON OVERALL, hole_diameter: 0.130 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 1.031 INCHES NOMINAL IN, overall_length: 1.031 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 0.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-950-1970, 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
371-8503-000
NSN: 5330-00-950-1970
FSC: 5330
CAGE: 95105 — ROCKWELL COLLINS, INC. DIV COLLINS AEROSPACE - MISSION SYSTEMS (USA)
SPECIFICATIONS
materialCOTTON OVERALL
hole_diameter0.130 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width1.031 INCHES NOMINAL IN
overall_length1.031 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter0.750 INCHES NOMINAL IN
bolt_hole_quantity4
outside_corner_radius0.109 INCHES NOMINAL IN
cross-sectional_thickness0.024 INCHES NOMINAL IN
cross-sectional_shape_styleCLOTH AND SYNTHETIC RUBBER, NONMETALLIC MATERIAL
outside_edge_to_bolt_hole_center_distance_along_width0.1095 INCHES NOMINAL IN
outside_edge_to_bolt_hole_center_distance_along_length0.1095 INCHES NOMINAL IN
NSN5330-00-950-1970
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 371-8503-000 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
•
STYLE DESIGNATOR: NON-CIRCULAR
•
APERTURE DIAMETER: 0.750 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4
•
OUTSIDE CORNER RADIUS: 0.109 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH: 0.813 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH: 0.1095 INCHES NOMINAL IN
•
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH: 0.1095 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORNON-CIRCULAR
OVERALL WIDTH1.031 INCHES NOMINAL IN
APERTURE DIAMETER0.750 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
OUTSIDE CORNER RADIUS0.109 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH0.813 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH0.1095 INCHES NOMINAL IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH0.1095 INCHES NOMINAL IN
MATERIALCOTTON OVERALL
HOLE DIAMETER0.130 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
B5856SInterchangeable
interchangeable cross-reference
interchangeable
B5866SInterchangeable
interchangeable cross-reference
interchangeable
11708Interchangeable
interchangeable cross-reference
interchangeable
0N288173-1Interchangeable
interchangeable cross-reference
interchangeable
21024371-101Interchangeable
interchangeable cross-reference
interchangeable
84001221-101Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 371-8503-000?
371-8503-000 is a GASKET.
What parts can replace 371-8503-000?
There are 16 known substitutes for 371-8503-000: B5856S, B5866S, 11708 and 13 more. Substitute compatibility should be verified for your specific system.
Is 371-8503-000 still available?
371-8503-000 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026