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SS4021 7-16B — PACKING WITH RETAINER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SS4021 7-16B: PACKING WITH RETAINER.

The PACKING WITH RETAINER is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 RETAINER, construction: ONE-PIECE, outside_diameter: 0.745 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN, surface_treatment: ANODIZE RETAINER, retainer_thickness: 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN, packing_inside_diameter: 0.417 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-857-2902, 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
SS4021 7-16B
NSN: 5330-00-857-2902
NIINs: 008572902, 010800764
FSC: 5330 — Packing and Gasket Materials
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 RETAINER
constructionONE-PIECE
outside_diameter0.745 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN
surface_treatmentANODIZE RETAINER
retainer_thickness0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
packing_inside_diameter0.417 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
specification/standard_data80205-NAS 1523 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
material_document_and_classificationMIL-R-6855 CL 1 GR 60 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
packing_ring_cross-sectional_diameter0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
surface_treatment_document_and_classificationMIL-A-8625 TY 2 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE RETAINER
NSN5330-00-857-2902
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SS4021 7-16B 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
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SS4021 7-16B?
SS4021 7-16B is a PACKING WITH RETAINER.
What is the NSN for SS4021 7-16B?
SS4021 7-16B is cataloged in the U.S. Government catalog under NSN 5330-00-857-2902. This indicates validated use in U.S. government and defense supply chains.
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