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513P639-01 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

513P639-01: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, end_diameter: 0.5750 INCHES MINIMUM AND 0.5800 INCHES MAXIMUM IN, bore_diameter: 0.4160 INCHES MINIMUM AND 0.4180 INCHES MAXIMUM IN, overall_height: 0.2250 INCHES NOMINAL IN, style_designator: SEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-327-5098, 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
513P639-01
NSN: 5340-01-327-5098
FSC: 5340 — Hardware, Commercial
CAGE: 65065 — WOODWARD FST, INC (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
end_diameter0.5750 INCHES MINIMUM AND 0.5800 INCHES MAXIMUM IN
bore_diameter0.4160 INCHES MINIMUM AND 0.4180 INCHES MAXIMUM IN
overall_height0.2250 INCHES NOMINAL IN
style_designatorSEAT
counterbore_length0.0450 INCHES NOMINAL IN
first_step_diameter0.8080 INCHES NOMINAL IN
chamfer_angle_in_deg45.0
counterbore_diameter0.5200 INCHES NOMINAL IN
distance_from_end_to_first_step1.7250 INCHES MINIMUM AND 1.7300 INCHES MAXIMUM IN
NSN5340-01-327-5098
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 513P639-01 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: 0.8080 INCHES NOMINAL IN
•
END DIAMETER: 0.5750 INCHES MINIMUM AND 0.5800 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 1.7250 INCHES MINIMUM AND 1.7300 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
COUNTERBORE LENGTH: 0.0450 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 0.5200 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.2250 INCHES NOMINAL IN
FIRST STEP DIAMETER0.8080 INCHES NOMINAL IN
END DIAMETER0.5750 INCHES MINIMUM AND 0.5800 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP1.7250 INCHES MINIMUM AND 1.7300 INCHES MAXIMUM IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
COUNTERBORE LENGTH0.0450 INCHES NOMINAL IN
COUNTERBORE DIAMETER0.5200 INCHES NOMINAL IN
CHAMFER ANGLE IN DEG45.0
BORE DIAMETER0.4160 INCHES MINIMUM AND 0.4180 INCHES MAXIMUM 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 513P639-01?
513P639-01 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 513P639-01?
513P639-01 is cataloged in the U.S. Government catalog under NSN 5340-01-327-5098. 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.