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Technical Data Sheet
PartsTable / COMPONENT / 5M988-5
5M988-5 ✓ 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: NICKEL ALLOY 400 INSERT, hole_diameter: 0.172 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 1.188 INCHES NOMINAL IN, overall_length: 1.188 INCHES NOMINAL IN, aperture_diameter: 0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN, cross-sectional_thickness: 0.045 INCHES MINIMUM AND 0.065 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 5330-00-189-9424, 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
5M988-5
NSN: 5330-00-189-9424
FSC: 5330
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 INSERT
hole_diameter0.172 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width1.188 INCHES NOMINAL IN
overall_length1.188 INCHES NOMINAL IN
aperture_diameter0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
cross-sectional_thickness0.045 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
cross-sectional_shape_styleFIBRE OR COMPOSITION WITH WIRE INSERT
material_document_and_classificationMIL-R-5847,CL 3 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
center_to_center_distance_between_bolt_holes_along_width0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
center_to_center_distance_between_bolt_holes_along_length0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
NSN5330-00-189-9424
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5M988-5 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
•
CROSS-SECTIONAL SHAPE STYLE: FIBRE OR COMPOSITION WITH WIRE INSERT
•
MATERIAL: RUBBER SILICONE CLASS Q OVERALL
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH: 0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-5847,CL 3 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
APERTURE DIAMETER: 0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEFIBRE OR COMPOSITION WITH WIRE INSERT
OVERALL LENGTH1.188 INCHES NOMINAL IN
MATERIALRUBBER SILICONE CLASS Q OVERALL
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-5847,CL 3 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE INSERT
MATERIALNICKEL ALLOY 400 INSERT
APERTURE DIAMETER0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
CROSS-SECTIONAL THICKNESS0.045 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
51863Interchangeable
interchangeable cross-reference
interchangeable
R26343Interchangeable
interchangeable cross-reference
interchangeable
R1885SNInterchangeable
interchangeable cross-reference
interchangeable
35.216Interchangeable
interchangeable cross-reference
interchangeable
2068Interchangeable
interchangeable cross-reference
interchangeable
8806Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5M988-5?
5M988-5 is a GASKET.
What parts can replace 5M988-5?
There are 14 known substitutes for 5M988-5: 51863, R26343, R1885SN and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5M988-5?
5M988-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-189-9424. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026