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145H7316-1 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

145H7316-1: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL COMP 4130, design_type: SOLID, end_diameter: 0.6800 INCHES MINIMUM AND 0.6900 INCHES MAXIMUM IN, bore_diameter: 0.4680 INCHES MINIMUM AND 0.4720 INCHES MAXIMUM IN, overall_height: 0.3650 INCHES MINIMUM AND 0.3850 INCHES MAXIMUM IN, special_features: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-117-7709, 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
145H7316-1
NSN: 5340-01-117-7709
FSC: 5340 — Hardware, Commercial
CAGE: 77272 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 4130
design_typeSOLID
end_diameter0.6800 INCHES MINIMUM AND 0.6900 INCHES MAXIMUM IN
bore_diameter0.4680 INCHES MINIMUM AND 0.4720 INCHES MAXIMUM IN
overall_height0.3650 INCHES MINIMUM AND 0.3850 INCHES MAXIMUM IN
special_featuresNOT CASEHARDENED
style_designatorSEAT
first_step_length0.0750 INCHES MINIMUM AND 0.9500 INCHES MAXIMUM IN
counterbore_length0.1400 INCHES MINIMUM AND 0.1500 INCHES MAXIMUM IN
first_step_diameter0.7100 INCHES MINIMUM AND 0.7200 INCHES MAXIMUM IN
counterbore_diameter0.5980 INCHES MINIMUM AND 0.6080 INCHES MAXIMUM IN
second_step_diameter0.8650 INCHES MINIMUM AND 0.8850 INCHES MAXIMUM IN
NSN5340-01-117-7709
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 145H7316-1 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: 0.7100 INCHES MINIMUM AND 0.7200 INCHES MAXIMUM IN
•
END DIAMETER: 0.6800 INCHES MINIMUM AND 0.6900 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 0.2050 INCHES MINIMUM AND 0.2250 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758, COMP 4130 MIL SPEC SINGLE MATERIAL RESPONSE
•
COUNTERBORE LENGTH: 0.1400 INCHES MINIMUM AND 0.1500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.3650 INCHES MINIMUM AND 0.3850 INCHES MAXIMUM IN
FIRST STEP DIAMETER0.7100 INCHES MINIMUM AND 0.7200 INCHES MAXIMUM IN
END DIAMETER0.6800 INCHES MINIMUM AND 0.6900 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP0.2050 INCHES MINIMUM AND 0.2250 INCHES MAXIMUM IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758, COMP 4130 MIL SPEC SINGLE MATERIAL RESPONSE
COUNTERBORE LENGTH0.1400 INCHES MINIMUM AND 0.1500 INCHES MAXIMUM IN
SECOND STEP DIAMETER0.8650 INCHES MINIMUM AND 0.8850 INCHES MAXIMUM IN
COUNTERBORE DIAMETER0.5980 INCHES MINIMUM AND 0.6080 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 145H7316-1?
145H7316-1 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 145H7316-1?
145H7316-1 is cataloged in the U.S. Government catalog under NSN 5340-01-117-7709. 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.