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58638-6 — WEB,STRUCTURAL COMPONENT,AIRCRAF

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

58638-6: WEB,STRUCTURAL COMPONENT,AIRCRAF.

WEB,STRUCTURAL COMPONENT,AIRCRAF. Key specifications include length: 0.563 INCHES NOMINAL IN, diameter: 0.212 INCHES MINIMUM IN, flange_diameter: 0.250 INCHES NOMINAL IN, flange_thickness: 0.125 INCHES NOMINAL IN, style_designator: FLANGED LEFT INTERNAL THREAD, cross-sectional_shape: HEXAGON. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-203-1957, 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
58638-6
NSN: 5340-01-203-1957
NIINs: 012031957, 014926404, 014926405
FSC: 5340 — Hardware, Commercial
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
length0.563 INCHES NOMINAL IN
diameter0.212 INCHES MINIMUM IN
flange_diameter0.250 INCHES NOMINAL IN
flange_thickness0.125 INCHES NOMINAL IN
style_designatorFLANGED LEFT INTERNAL THREAD
cross-sectional_shapeHEXAGON
NSN5340-01-203-1957
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 58638-6 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
•
FLANGE DIAMETER: 0.250 INCHES NOMINAL IN
•
LENGTH: 0.563 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLANGED LEFT INTERNAL THREAD
•
DIAMETER: 0.212 INCHES MINIMUM IN
•
CROSS-SECTIONAL SHAPE: HEXAGON
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER0.250 INCHES NOMINAL IN
LENGTH0.563 INCHES NOMINAL IN
FLANGE THICKNESS0.125 INCHES NOMINAL IN
STYLE DESIGNATORFLANGED LEFT INTERNAL THREAD
DIAMETER0.212 INCHES MINIMUM IN
CROSS-SECTIONAL SHAPEHEXAGON
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 58638-6?
58638-6 is a WEB,STRUCTURAL COMPONENT,AIRCRAF.
What is the NSN for 58638-6?
58638-6 is cataloged in the U.S. Government catalog under NSN 5340-01-203-1957. 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.