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158334 PIECE 4 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

158334 PIECE 4: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: NICKEL ALLOY, design_type: SOLID, end_diameter: 8.5000 INCHES NOMINAL IN, bore_diameter: 4.0000 INCHES NOMINAL IN, overall_height: 1.7500 INCHES NOMINAL IN, special_features: THE ITEM IS MADE OF ASTM-B-164;THER IS A SECOND PIECE INCLUDED CLLED A HUB. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-441-0288, 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
158334 PIECE 4
NSN: 5340-01-441-0288
FSC: 5340 — Hardware, Commercial
CAGE: 13344 — NEWTERRA CORPORATION, INC. (USA)
SPECIFICATIONS
materialNICKEL ALLOY
design_typeSOLID
end_diameter8.5000 INCHES NOMINAL IN
bore_diameter4.0000 INCHES NOMINAL IN
overall_height1.7500 INCHES NOMINAL IN
special_featuresTHE ITEM IS MADE OF ASTM-B-164;THER IS A SECOND PIECE INCLUDED CLLED A HUB
style_designatorSEAT
first_step_diameter11.7500 INCHES NOMINAL IN
distance_from_end_to_first_step0.7500 INCHES NOMINAL IN
NSN5340-01-441-0288
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 158334 PIECE 4 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: 11.7500 INCHES NOMINAL IN
•
END DIAMETER: 8.5000 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.7500 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
BORE DIAMETER: 4.0000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.7500 INCHES NOMINAL IN
FIRST STEP DIAMETER11.7500 INCHES NOMINAL IN
END DIAMETER8.5000 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.7500 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
SPECIAL FEATURESTHE ITEM IS MADE OF ASTM-B-164;THER IS A SECOND PIECE INCLUDED CLLED A HUB
BORE DIAMETER4.0000 INCHES NOMINAL IN
MATERIALNICKEL ALLOY
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 158334 PIECE 4?
158334 PIECE 4 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 158334 PIECE 4?
158334 PIECE 4 is cataloged in the U.S. Government catalog under NSN 5340-01-441-0288. 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.