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747872-4 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

747872-4: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, end_diameter: 0.2750 INCHES NOMINAL IN, bore_diameter: 0.1280 INCHES NOMINAL IN, overall_height: 0.3320 INCHES NOMINAL IN, special_features: BORE 0.250 IN. DP FROM FLANGED END IN, style_designator: SEAT.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-049-6541, 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
747872-4
NSN: 5340-01-049-6541
FSC: 5340 — Hardware, Commercial
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL
end_diameter0.2750 INCHES NOMINAL IN
bore_diameter0.1280 INCHES NOMINAL IN
overall_height0.3320 INCHES NOMINAL IN
special_featuresBORE 0.250 IN. DP FROM FLANGED END IN
style_designatorSEAT
first_step_diameter0.3050 INCHES NOMINAL IN
second_step_diameter0.3850 INCHES NOMINAL IN
NSN5340-01-049-6541
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 747872-4 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
•
FIRST STEP DIAMETER: 0.3050 INCHES NOMINAL IN
•
END DIAMETER: 0.2750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SEAT
•
SECOND STEP DIAMETER: 0.3850 INCHES NOMINAL IN
•
BORE DIAMETER: 0.1280 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.3320 INCHES NOMINAL IN
FIRST STEP DIAMETER0.3050 INCHES NOMINAL IN
END DIAMETER0.2750 INCHES NOMINAL IN
STYLE DESIGNATORSEAT
SECOND STEP DIAMETER0.3850 INCHES NOMINAL IN
SPECIAL FEATURESBORE 0.250 IN. DP FROM FLANGED END IN
BORE DIAMETER0.1280 INCHES NOMINAL IN
MATERIALSTEEL
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 747872-4?
747872-4 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 747872-4?
747872-4 is cataloged in the U.S. Government catalog under NSN 5340-01-049-6541. 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.