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PartsTable / COMPONENT / N28557
N28557 ✓ 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 TRANSFORMER,POWER is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND RUBBER NATURAL OVERALL, body_width: 2.625 INCHES NOMINAL IN, body_height: 3.187 INCHES NOMINAL IN, body_length: 3.062 INCHES NOMINAL IN, hole_diameter: 0.410 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 2.620 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-700-6868, 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
N28557
NSN: 5330-00-700-6868
FSC: 5330
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialASBESTOS AND RUBBER NATURAL OVERALL
body_width2.625 INCHES NOMINAL IN
body_height3.187 INCHES NOMINAL IN
body_length3.062 INCHES NOMINAL IN
hole_diameter0.410 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width2.620 INCHES NOMINAL IN
inclosure_typeHERMETICALLY SEALED
overall_length2.690 INCHES NOMINAL IN
aperture_length2.030 INCHES NOMINAL IN
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating60.0 HERTZ NOMINAL SINGLE COMPONENT
nominal_thread_size0.164 INCHES SINGLE GROUP IN
NSN5330-00-700-6868
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: N28557 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
•
MATERIAL: ASBESTOS AND RUBBER NATURAL OVERALL
•
HOLE DIAMETER: 0.410 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH: 1.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
APERTURE LENGTH: 2.030 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.020 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALASBESTOS AND RUBBER NATURAL OVERALL
HOLE DIAMETER0.410 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH1.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL LENGTH2.690 INCHES NOMINAL IN
OVERALL WIDTH2.620 INCHES NOMINAL IN
APERTURE LENGTH2.030 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.020 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
133494R2Interchangeable
interchangeable cross-reference
interchangeable
967610R91Interchangeable
interchangeable cross-reference
interchangeable
7581HInterchangeable
interchangeable cross-reference
interchangeable
NMC5038Interchangeable
interchangeable cross-reference
interchangeable
580R008H01Interchangeable
interchangeable cross-reference
interchangeable
16P30Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N28557?
N28557 is a TRANSFORMER,POWER.
What parts can replace N28557?
There are 26 known substitutes for N28557: 133494R2, 967610R91, 7581H and 23 more. Substitute compatibility should be verified for your specific system.
Is N28557 still available?
N28557 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