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20400-15 — ADAPTER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

20400-15: ADAPTER.

The ADAPTER is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 RETAINER, construction: ONE-PIECE, outside_diameter: 7.875 INCHES NOMINAL IN, special_features: SIXTEEN 0.281 IN. DIA MOUNTING HOLES EQUALLY SPACED ON 7.250 IN.

DIA BOLT CIRCLE IN, surface_treatment: ANODIZE RETAINER, retainer_thickness: 0.090 INCHES NOMINAL IN. This part is cataloged in the U.S. Government catalog under NSN 5330-00-406-7725, 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
20400-15
NSN: 5330-00-406-7725
NIINs: 004067725, 011205765, 016596848
FSC: 5330 — Packing and Gasket Materials
CAGE: 83259 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV COMPOSITE SEALING SYSTEMS DIVISION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 RETAINER
constructionONE-PIECE
outside_diameter7.875 INCHES NOMINAL IN
special_featuresSIXTEEN 0.281 IN. DIA MOUNTING HOLES EQUALLY SPACED ON 7.250 IN. DIA BOLT CIRCLE IN
surface_treatmentANODIZE RETAINER
retainer_thickness0.090 INCHES NOMINAL IN
packing_inside_diameter6.500 INCHES NOMINAL IN
retainer_inside_diameter6.701 INCHES NOMINAL IN
material_document_and_classificationQQ-A-25/11 T6 FED SPEC SINGLE MATERIAL RESPONSE RETAINER
packing_ring_cross-sectional_diameter0.130 INCHES NOMINAL IN
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE RETAINER
NSN5330-00-406-7725
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 20400-15 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
•
RETAINER INSIDE DIAMETER: 6.701 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE RETAINER
•
PACKING INSIDE DIAMETER: 6.500 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 7.875 INCHES NOMINAL IN
•
PACKING RING CROSS-SECTIONAL DIAMETER: 0.130 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-6855 CL 1,GR 60 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
•
RETAINER THICKNESS: 0.090 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
RETAINER INSIDE DIAMETER6.701 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE RETAINER
PACKING INSIDE DIAMETER6.500 INCHES NOMINAL IN
OUTSIDE DIAMETER7.875 INCHES NOMINAL IN
PACKING RING CROSS-SECTIONAL DIAMETER0.130 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-6855 CL 1,GR 60 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-25/11 T6 FED SPEC SINGLE MATERIAL RESPONSE RETAINER
RETAINER THICKNESS0.090 INCHES NOMINAL IN
SPECIAL FEATURESSIXTEEN 0.281 IN. DIA MOUNTING HOLES EQUALLY SPACED ON 7.250 IN. DIA BOLT CIRCLE IN
SURFACE TREATMENTANODIZE RETAINER
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 20400-15?
20400-15 is a ADAPTER.
What is the NSN for 20400-15?
20400-15 is cataloged in the U.S. Government catalog under NSN 5330-00-406-7725. 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.