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973428 — RETAINER,PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

973428: RETAINER,PACKING.

The RETAINER,PACKING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C OVERALL, special_features: HEAT TREAT PER MIL-H-6875 FOR HRC 58 MINIMUM, outer_groove_depth: 0.176 INCHES NOMINAL IN, outer_groove_width: 0.190 INCHES NOMINAL IN, peripheral_diameter: 1.989 INCHES NOMINAL IN, center_hole_diameter: 1.278 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-473-7520, 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
973428
NSN: 5330-01-473-7520
FSC: 5330 — Packing and Gasket Materials
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
materialSTEEL COMP 440C OVERALL
special_featuresHEAT TREAT PER MIL-H-6875 FOR HRC 58 MINIMUM
outer_groove_depth0.176 INCHES NOMINAL IN
outer_groove_width0.190 INCHES NOMINAL IN
peripheral_diameter1.989 INCHES NOMINAL IN
center_hole_diameter1.278 INCHES NOMINAL IN
cross-sectional_height0.330 INCHES NOMINAL IN
end_item_identificationLAUNCHER,ROCKET,ARMORED VEHICLE MOUNTED MULTIPLE ROCKET SYSTEM (MLRS),SURFACE TO AIR MISSILES NSN 1055014504243
cross-sectional_shape_styleSPECIAL
material_document_and_classificationAMS5880 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyRING,MATING
NSN5330-01-473-7520
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 973428 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
•
OUTER GROOVE DEPTH: 0.176 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.330 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5880 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
PERIPHERAL DIAMETER: 1.989 INCHES NOMINAL IN
•
OUTER GROOVE WIDTH: 0.190 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.278 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTER GROOVE DEPTH0.176 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.330 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5880 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESPECIAL
PERIPHERAL DIAMETER1.989 INCHES NOMINAL IN
OUTER GROOVE WIDTH0.190 INCHES NOMINAL IN
SPECIAL FEATURESHEAT TREAT PER MIL-H-6875 FOR HRC 58 MINIMUM
CENTER HOLE DIAMETER1.278 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYRING,MATING
END ITEM IDENTIFICATIONLAUNCHER,ROCKET,ARMORED VEHICLE MOUNTED MULTIPLE ROCKET SYSTEM (MLRS),SURFACE TO AIR MISSILES NSN 1055014504243
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 973428?
973428 is a RETAINER,PACKING.
What is the NSN for 973428?
973428 is cataloged in the U.S. Government catalog under NSN 5330-01-473-7520. 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.