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R138864 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

R138864: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include part_name_assigned_by_controlling_agency: SPRING SEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-140-0386, 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
R138864
NSN: 5340-01-140-0386
FSC: 5340 — Hardware, Commercial
CAGE: 7Y333 — ARGO TURBOSERVE CORPORATION DIV ARGO TURBOSERVE CORP. (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencySPRING SEAT
NSN5340-01-140-0386
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: R138864 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
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYSPRING SEAT
SUBSTITUTES & CROSS-REFERENCES 3
541802 PIECE 73Reference document
Same NSN cross-reference
Reference document — Secondary reference
18864Reference document
Same NSN cross-reference
Reference document — Secondary reference
138864Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is R138864?
R138864 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace R138864?
There are 3 known substitutes for R138864: 541802 PIECE 73, 18864, 138864. Substitute compatibility should be verified for your specific system.
What is the NSN for R138864?
R138864 is cataloged in the U.S. Government catalog under NSN 5340-01-140-0386. 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.