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736353 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

736353: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include end_diameter: 1.4040 INCHES MINIMUM AND 1.4640 INCHES MAXIMUM IN, bore_diameter: 0.3230 INCHES MINIMUM AND 3.3330 INCHES MAXIMUM IN, overall_height: 1.0470 INCHES MINIMUM AND 1.0770 INCHES MAXIMUM IN, special_features: APPL TO B-1B, style_designator: SEAT, counterbore_length: 0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-217-3201, 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
736353
NSN: 5340-01-217-3201
FSC: 5340 — Hardware, Commercial
CAGE: 55820 — RTX CORPORATION DIV PRATT & WHITNEY (USA)
SPECIFICATIONS
end_diameter1.4040 INCHES MINIMUM AND 1.4640 INCHES MAXIMUM IN
bore_diameter0.3230 INCHES MINIMUM AND 3.3330 INCHES MAXIMUM IN
overall_height1.0470 INCHES MINIMUM AND 1.0770 INCHES MAXIMUM IN
special_featuresAPPL TO B-1B
style_designatorSEAT
counterbore_length0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN
first_step_diameter3.2750 INCHES MINIMUM AND 3.3150 INCHES MAXIMUM IN
counterbore_diameter1.3440 INCHES MINIMUM AND 1.4040 INCHES MAXIMUM IN
fsc_application_dataVALVE,SHUTOFF,APU
supplementary_featuresUSE WITH VALVE P/N 736633,FSCM 99167,FSC 4810 AND P/N 736262,NSN 4810-01-165-5918
distance_from_end_to_first_step0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN
distance_from_center_to_beginning_of_ridge1.4060 INCHES NOMINAL IN
NSN5340-01-217-3201
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 736353 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
•
FSC APPLICATION DATA: VALVE,SHUTOFF,APU
•
FIRST STEP DIAMETER: 3.2750 INCHES MINIMUM AND 3.3150 INCHES MAXIMUM IN
•
END DIAMETER: 1.4040 INCHES MINIMUM AND 1.4640 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN
•
SUPPLEMENTARY FEATURES: USE WITH VALVE P/N 736633,FSCM 99167,FSC 4810 AND P/N 736262,NSN 4810-01-165-5918
•
STYLE DESIGNATOR: SEAT
•
COUNTERBORE LENGTH: 0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.0470 INCHES MINIMUM AND 1.0770 INCHES MAXIMUM IN
FSC APPLICATION DATAVALVE,SHUTOFF,APU
FIRST STEP DIAMETER3.2750 INCHES MINIMUM AND 3.3150 INCHES MAXIMUM IN
END DIAMETER1.4040 INCHES MINIMUM AND 1.4640 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN
SUPPLEMENTARY FEATURESUSE WITH VALVE P/N 736633,FSCM 99167,FSC 4810 AND P/N 736262,NSN 4810-01-165-5918
STYLE DESIGNATORSEAT
COUNTERBORE LENGTH0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN
COUNTERBORE DIAMETER1.3440 INCHES MINIMUM AND 1.4040 INCHES MAXIMUM IN
DISTANCE FROM CENTER TO BEGINNING OF RIDGE1.4060 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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 736353?
736353 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 736353?
736353 is cataloged in the U.S. Government catalog under NSN 5340-01-217-3201. 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.