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351-50570 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

351-50570: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, end_diameter: 0.8600 INCHES NOMINAL IN, bore_diameter: 0.5820 INCHES NOMINAL IN, overall_height: 0.4420 INCHES NOMINAL IN, style_designator: SEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-018-6136, 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
351-50570
NSN: 5340-01-018-6136
FSC: 5340 — Hardware, Commercial
CAGE: KCTG3 — CHASE INTERNATIONAL (CONTRACT SERVICES) LTD (GBR)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
end_diameter0.8600 INCHES NOMINAL IN
bore_diameter0.5820 INCHES NOMINAL IN
overall_height0.4420 INCHES NOMINAL IN
style_designatorSEAT
bore_taper_in_deg6.0
features_providedCASEHARDENED
first_step_length0.1050 INCHES NOMINAL IN
first_step_diameter1.0870 INCHES NOMINAL IN
chamfer_angle_in_deg15.0
second_step_diameter1.4300 INCHES NOMINAL IN
NSN5340-01-018-6136
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 351-50570 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: 1.0870 INCHES NOMINAL IN
•
END DIAMETER: 0.8600 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.2100 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
FEATURES PROVIDED: CASEHARDENED
•
SECOND STEP DIAMETER: 1.4300 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.4420 INCHES NOMINAL IN
FIRST STEP DIAMETER1.0870 INCHES NOMINAL IN
END DIAMETER0.8600 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.2100 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
FEATURES PROVIDEDCASEHARDENED
SECOND STEP DIAMETER1.4300 INCHES NOMINAL IN
BORE TAPER IN DEG6.0
FIRST STEP LENGTH0.1050 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 351-50570?
351-50570 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 351-50570?
351-50570 is cataloged in the U.S. Government catalog under NSN 5340-01-018-6136. 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.