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975427-1 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

975427-1: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL COMP 303, design_type: FRICTION, overall_diameter: 3.750 INCHES NOMINAL IN, special_features: H/T TO H1150 CONDITION PER MIL-H-6875,HARDNESS RC28-37, surface_treatment: PASSIVATE, inside_diameter_length: 0.313 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-297-1663, 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
975427-1
NSN: 5340-01-297-1663
FSC: 5340 — Hardware, Commercial
CAGE: 3B150 — RAYTHEON COMPANY DBA RAYTHEON CO (USA)
SPECIFICATIONS
materialSTEEL COMP 303
design_typeFRICTION
overall_diameter3.750 INCHES NOMINAL IN
special_featuresH/T TO H1150 CONDITION PER MIL-H-6875,HARDNESS RC28-37
surface_treatmentPASSIVATE
inside_diameter_length0.313 INCHES NOMINAL IN
end_item_identificationP/N 192288;AN/TPN-19
material_document_and_classificationQQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE
opening_inside_diameter_for_which_designed3.494 INCHES NOMINAL IN
NSN5340-01-297-1663
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 975427-1 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 3.750 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 3.494 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL COMP 303
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER3.750 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE
OPENING INSIDE DIAMETER FOR WHICH DESIGNED3.494 INCHES NOMINAL IN
SPECIAL FEATURESH/T TO H1150 CONDITION PER MIL-H-6875,HARDNESS RC28-37
SURFACE TREATMENTPASSIVATE
END ITEM IDENTIFICATIONP/N 192288;AN/TPN-19
MATERIALSTEEL COMP 303
INSIDE DIAMETER LENGTH0.313 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 975427-1?
975427-1 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 975427-1?
975427-1 is cataloged in the U.S. Government catalog under NSN 5340-01-297-1663. This indicates validated use in U.S. government and defense supply chains.
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