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137W91D20 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

137W91D20: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: COPPER ALLOY, design_type: SOLID, end_diameter: 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN, bore_diameter: 0.0940 INCHES MINIMUM AND 0.0950 INCHES MAXIMUM IN, overall_height: 0.1600 INCHES NOMINAL IN, special_features: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-905-8192, 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
137W91D20
NSN: 5340-00-905-8192
FSC: 5340 — Hardware, Commercial
CAGE: 09790 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV VALVE & ACTUATOR (USA)
SPECIFICATIONS
materialCOPPER ALLOY
design_typeSOLID
end_diameter0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN
bore_diameter0.0940 INCHES MINIMUM AND 0.0950 INCHES MAXIMUM IN
overall_height0.1600 INCHES NOMINAL IN
special_featuresNOT CASEHARDENED
style_designatorSEAT
first_step_diameter0.3100 INCHES NOMINAL IN
chamfer_angle_in_deg30.0
fsc_application_dataAIRBLEED VALVE,ENGINE,AIRCRAFT
distance_from_end_to_first_step0.1100 INCHES NOMINAL IN
NSN5340-00-905-8192
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 137W91D20 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
•
FSC APPLICATION DATA: AIRBLEED VALVE,ENGINE,AIRCRAFT
•
FIRST STEP DIAMETER: 0.3100 INCHES NOMINAL IN
•
END DIAMETER: 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 0.1100 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.1600 INCHES NOMINAL IN
FSC APPLICATION DATAAIRBLEED VALVE,ENGINE,AIRCRAFT
FIRST STEP DIAMETER0.3100 INCHES NOMINAL IN
END DIAMETER0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP0.1100 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
SPECIAL FEATURESNOT CASEHARDENED
CHAMFER ANGLE IN DEG30.0
BORE DIAMETER0.0940 INCHES MINIMUM AND 0.0950 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 137W91D20?
137W91D20 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 137W91D20?
137W91D20 is cataloged in the U.S. Government catalog under NSN 5340-00-905-8192. 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.