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L31538 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

L31538: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: ALUMINUM ALLOY, design_type: SOLID, end_diameter: 0.7500 INCHES NOMINAL IN, bore_diameter: 0.1875 INCHES NOMINAL IN, overall_height: 0.3750 INCHES NOMINAL IN, special_features: 1ST STEP HEX SHAPE 1.375 IN. ACROSS FLATS WITH FLATTED CORNERS IN.

This part is cataloged in the U.S. Government catalog under NSN 5340-00-117-9102, 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
L31538
NSN: 5340-00-117-9102
FSC: 5340 — Hardware, Commercial
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
design_typeSOLID
end_diameter0.7500 INCHES NOMINAL IN
bore_diameter0.1875 INCHES NOMINAL IN
overall_height0.3750 INCHES NOMINAL IN
special_features1ST STEP HEX SHAPE 1.375 IN. ACROSS FLATS WITH FLATTED CORNERS IN
style_designatorSEAT
first_step_length0.1250 INCHES NOMINAL IN
surface_treatmentANODIZE
counterbore_length0.0250 INCHES NOMINAL IN
first_step_diameter1.4920 INCHES NOMINAL IN
chamfer_angle_in_deg5.0
NSN5340-00-117-9102
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: L31538 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
•
COUNTERSINK ANGLE IN DEG: 35.0
•
FIRST STEP DIAMETER: 1.4920 INCHES NOMINAL IN
•
END DIAMETER: 0.7500 INCHES NOMINAL IN
•
COUNTERSINK DIAMETER: 0.2660 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.2500 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.3750 INCHES NOMINAL IN
COUNTERSINK ANGLE IN DEG35.0
FIRST STEP DIAMETER1.4920 INCHES NOMINAL IN
END DIAMETER0.7500 INCHES NOMINAL IN
COUNTERSINK DIAMETER0.2660 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.2500 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
COUNTERBORE LENGTH0.0250 INCHES NOMINAL IN
COUNTERBORE DIAMETER1.1250 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
69468Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
10510325Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 L31538?
L31538 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace L31538?
There are 2 known substitutes for L31538: 69468, 10510325. Substitute compatibility should be verified for your specific system.
What is the NSN for L31538?
L31538 is cataloged in the U.S. Government catalog under NSN 5340-00-117-9102. 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.