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SD028 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SD028: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 SPRING, special_features: MATERIAL TURCON 52 OR GRAPHITE FILLED POLYTETRAFLUOROETHYLENE, peripheral_diameter: 3.273 INCHES NOMINAL IN, center_hole_diameter: 3.073 INCHES NOMINAL IN, cross-sectional_height: 0.150 INCHES NOMINAL IN, cross-sectional_shape_style: SPECIAL. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-491-9640, 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
SD028
NSN: 5330-01-491-9640
FSC: 5330 — Packing and Gasket Materials
CAGE: 24984 — HYDRAFLOW (USA)
SPECIFICATIONS
materialSTEEL COMP 304 SPRING
special_featuresMATERIAL TURCON 52 OR GRAPHITE FILLED POLYTETRAFLUOROETHYLENE
peripheral_diameter3.273 INCHES NOMINAL IN
center_hole_diameter3.073 INCHES NOMINAL IN
cross-sectional_height0.150 INCHES NOMINAL IN
cross-sectional_shape_styleSPECIAL
material_document_and_classificationAMS5529, 17-7 PH CRES OR 304 CRES PER MIL-5-5059 ASSN STD SINGLE MATERIAL RESPONSE SPRING
part_name_assigned_by_controlling_agencySEAL HIGH TEMPERATURE
NSN5330-01-491-9640
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SD028 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: 0.150 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5529, 17-7 PH CRES OR 304 CRES PER MIL-5-5059 ASSN STD SINGLE MATERIAL RESPONSE SPRING
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
PERIPHERAL DIAMETER: 3.273 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 3.073 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE CASE
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.150 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5529, 17-7 PH CRES OR 304 CRES PER MIL-5-5059 ASSN STD SINGLE MATERIAL RESPONSE SPRING
CROSS-SECTIONAL SHAPE STYLESPECIAL
PERIPHERAL DIAMETER3.273 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL TURCON 52 OR GRAPHITE FILLED POLYTETRAFLUOROETHYLENE
CENTER HOLE DIAMETER3.073 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL HIGH TEMPERATURE
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE CASE
MATERIALSTEEL COMP 304 SPRING
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 SD028?
SD028 is a PACKING,PREFORMED.
What is the NSN for SD028?
SD028 is cataloged in the U.S. Government catalog under NSN 5330-01-491-9640. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.