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S6165-61553-1 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

S6165-61553-1: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, end_diameter: 0.8120 INCHES NOMINAL IN, bore_diameter: 0.3800 INCHES MINIMUM AND 0.3900 INCHES MAXIMUM IN, overall_height: 0.6770 INCHES MINIMUM AND 0.6820 INCHES MAXIMUM IN, special_features: NOT CASEHARDENED;MATL-STEEL MIL-S-6758 COND C. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-831-7052, 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
S6165-61553-1
NSN: 5340-00-831-7052
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
end_diameter0.8120 INCHES NOMINAL IN
bore_diameter0.3800 INCHES MINIMUM AND 0.3900 INCHES MAXIMUM IN
overall_height0.6770 INCHES MINIMUM AND 0.6820 INCHES MAXIMUM IN
special_featuresNOT CASEHARDENED;MATL-STEEL MIL-S-6758 COND C
style_designatorSEAT
counterbore_length0.0040 INCHES MINIMUM AND 0.0080 INCHES MAXIMUM IN
first_step_diameter1.3750 INCHES NOMINAL IN
chamfer_angle_in_deg45.0
counterbore_diameter0.6820 INCHES MINIMUM AND 0.6920 INCHES MAXIMUM IN
countersink_diameter0.4210 INCHES NOMINAL IN
NSN5340-00-831-7052
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S6165-61553-1 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
•
COUNTERSINK ANGLE IN DEG: 90.0
•
FIRST STEP DIAMETER: 1.3750 INCHES NOMINAL IN
•
MATERIAL HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
•
END DIAMETER: 0.8120 INCHES NOMINAL IN
•
COUNTERSINK DIAMETER: 0.4210 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.6230 INCHES MINIMUM AND 0.6320 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.6770 INCHES MINIMUM AND 0.6820 INCHES MAXIMUM IN
COUNTERSINK ANGLE IN DEG90.0
FIRST STEP DIAMETER1.3750 INCHES NOMINAL IN
MATERIAL HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
END DIAMETER0.8120 INCHES NOMINAL IN
COUNTERSINK DIAMETER0.4210 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.6230 INCHES MINIMUM AND 0.6320 INCHES MAXIMUM IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
COUNTERBORE LENGTH0.0040 INCHES MINIMUM AND 0.0080 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 1
S6165-61553-001Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 S6165-61553-1?
S6165-61553-1 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace S6165-61553-1?
There is 1 known substitute for S6165-61553-1: S6165-61553-001. Substitute compatibility should be verified for your specific system.
What is the NSN for S6165-61553-1?
S6165-61553-1 is cataloged in the U.S. Government catalog under NSN 5340-00-831-7052. 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.