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40257-4 — SHAFT ASSEMBLY,COMPRESSOR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

40257-4: SHAFT ASSEMBLY,COMPRESSOR.

The SHAFT ASSEMBLY,COMPRESSOR is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, hole_diameter: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 0.186 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN, overall_height: 0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN, overall_length: 1.250 INCHES NOMINAL IN, outside_diameter: 5.938 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-636-0403, 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
40257-4
NSN: 5340-00-636-0403
NIINs: 006360403, 006759946, 012315927, 012351264
FSC: 5340 — Hardware, Commercial
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialASBESTOS AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
hole_diameter0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width0.186 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
overall_height0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN
overall_length1.250 INCHES NOMINAL IN
outside_diameter5.938 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter3.625 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
bolt_hole_quantity8
starting_edge_shapeROUND
bolt_circle_diameter4.812 INCHES NOMINAL IN
NSN5340-00-636-0403
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 40257-4 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
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COLOR: BLACK
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SURFACE TREATMENT: ANODIZE
•
MATERIAL: ALUMINUM
TECHNICAL CHARACTERISTICS
COLORBLACK
SURFACE TREATMENTANODIZE
MATERIALALUMINUM
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 40257-4?
40257-4 is a SHAFT ASSEMBLY,COMPRESSOR.
What is the NSN for 40257-4?
40257-4 is cataloged in the U.S. Government catalog under NSN 5340-00-636-0403. This indicates validated use in U.S. government and defense supply chains.
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