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28G7 ✓ 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 PACKING MATERIAL is a the manufacturer industrial component. Key specifications include material: ASBESTOS, fabrication_method: TWISTED, cross-sectional_shape_style: CIRCULAR, nondefinitive_spec/std_data: 3 TYPE AND A GRADE AND 4 CLASS, cross_section_outside_diameter: 0.125 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-576-9309, 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
28G7
NSN: 5330-00-576-9309
FSC: 5330
CAGE: 76371 — MECHANICAL EQUIPMENT COMPANY, INC. DBA MECHANICAL EQUIPMENT CO INC (USA)
SPECIFICATIONS
materialASBESTOS
fabrication_methodTWISTED
cross-sectional_shape_styleCIRCULAR
nondefinitive_spec/std_data3 TYPE AND A GRADE AND 4 CLASS
cross_section_outside_diameter0.125 INCHES NOMINAL IN
NSN5330-00-576-9309
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 28G7 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: CIRCULAR
•
FABRICATION METHOD: TWISTED
•
CROSS SECTION OUTSIDE DIAMETER: 0.125 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS
•
NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND A GRADE AND 4 CLASS
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLECIRCULAR
FABRICATION METHODTWISTED
CROSS SECTION OUTSIDE DIAMETER0.125 INCHES NOMINAL IN
MATERIALASBESTOS
NONDEFINITIVE SPEC/STD DATA3 TYPE AND A GRADE AND 4 CLASS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
SP64543Interchangeable
interchangeable cross-reference
interchangeable
MILP16404Interchangeable
interchangeable cross-reference
interchangeable
SP64541Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28G7?
28G7 is a PACKING MATERIAL.
What parts can replace 28G7?
There are 3 known substitutes for 28G7: SP64543, MILP16404, SP64541. Substitute compatibility should be verified for your specific system.
Is 28G7 still available?
28G7 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