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16104354 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

16104354: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, end_diameter: 0.4210 INCHES NOMINAL IN, bore_diameter: 0.2810 INCHES NOMINAL IN, overall_height: 0.3120 INCHES NOMINAL IN, style_designator: SEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-217-0157, 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
16104354
NSN: 5340-00-217-0157
FSC: 5340 — Hardware, Commercial
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
end_diameter0.4210 INCHES NOMINAL IN
bore_diameter0.2810 INCHES NOMINAL IN
overall_height0.3120 INCHES NOMINAL IN
style_designatorSEAT
first_step_diameter0.6880 INCHES NOMINAL IN
countersink_angle_in_deg45.0
material_hardness_rating41.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
distance_from_end_to_first_step0.1870 INCHES NOMINAL IN
NSN5340-00-217-0157
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 16104354 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: 45.0
•
FIRST STEP DIAMETER: 0.6880 INCHES NOMINAL IN
•
MATERIAL HARDNESS RATING: 41.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
•
END DIAMETER: 0.4210 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.1870 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.3120 INCHES NOMINAL IN
COUNTERSINK ANGLE IN DEG45.0
FIRST STEP DIAMETER0.6880 INCHES NOMINAL IN
MATERIAL HARDNESS RATING41.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
END DIAMETER0.4210 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.1870 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
BORE DIAMETER0.2810 INCHES NOMINAL IN
MATERIALSTEEL
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 2
NAFB6363AReference document
Same NSN cross-reference
Reference document — Secondary reference
AFB6363AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 16104354?
16104354 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace 16104354?
There are 2 known substitutes for 16104354: NAFB6363A, AFB6363A. Substitute compatibility should be verified for your specific system.
What is the NSN for 16104354?
16104354 is cataloged in the U.S. Government catalog under NSN 5340-00-217-0157. 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.