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MS-28774-142 — RING,PISTON

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS-28774-142: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include ring_style: CONCENTRIC, joint_style: VERTICAL JOINT. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-027-1308, 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
MS-28774-142
NSN: 5330-01-027-1308
NIINs: 010271308, 013596491
FSC: 5330 — Packing and Gasket Materials
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
ring_styleCONCENTRIC
joint_styleVERTICAL JOINT
NSN5330-01-027-1308
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS-28774-142 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 HEIGHT: 0.045 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE-AS8791 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR
•
CUT TYPE: DIAGONAL OVERALL
•
PERIPHERAL DIAMETER: 2.725 INCHES MINIMUM AND 2.729 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 2.555 INCHES NOMINAL IN
•
MATERIAL: PLASTIC TETRAFLUOROETHYLENE OVERALL
•
JOINT TYPE: SCARF-PERIPHERAL ONE SIDE
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.045 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE-AS8791 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR
CUT TYPEDIAGONAL OVERALL
PERIPHERAL DIAMETER2.725 INCHES MINIMUM AND 2.729 INCHES MAXIMUM IN
CENTER HOLE DIAMETER2.555 INCHES NOMINAL IN
MATERIALPLASTIC TETRAFLUOROETHYLENE OVERALL
JOINT TYPESCARF-PERIPHERAL ONE SIDE
SUBSTITUTES & CROSS-REFERENCES 3
MS28774Reference document
Same NSN cross-reference
Reference document — Identification reference
5330PL1432498Reference document
Same NSN cross-reference
Reference document — Informative reference only
SAE-AS8791Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS-28774-142?
MS-28774-142 is a RING,PISTON.
What parts can replace MS-28774-142?
There are 3 known substitutes for MS-28774-142: MS28774, 5330PL1432498, SAE-AS8791. Substitute compatibility should be verified for your specific system.
What is the NSN for MS-28774-142?
MS-28774-142 is cataloged in the U.S. Government catalog under NSN 5330-01-027-1308. This indicates validated use in U.S. government and defense supply chains.
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