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Technical Data Sheet
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MC15909 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
Trust · ORING SEAL
PRODUCT OVERVIEW

MC15909: SEAT,HELICAL COMPRESSION SPRING.

- Exclusively designed for your Netbook, MacBook or MacBook Air. - Protective, soft padded notebook compartment. - Zipper-locked front and backside pockets to store your iPod, mobile phone, etc.

- Extra interior pockets for additional space to safely store your power supply, cables, etc. - Durable and adjustable shoulder-strap to ensure comfortable carrying - High strength Nylon fabric for heavy duty use. - Notebook compartment size (HxWxD in mm): 30 x 330 x 235.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-172-9501, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
MC15909
NSN: 5340-01-172-9501
FSC: 5340 — Hardware, Commercial
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 630
design_typeSOLID
end_diameter0.2330 INCHES NOMINAL IN
bore_diameter0.0630 INCHES NOMINAL IN
overall_height0.3200 INCHES NOMINAL IN
special_featuresSURFACE TREAT.-PASSIVATE PER MCP38,KELSEY-HAYES CO.;NOT CASEHARDENED
style_designatorSEAT
bore_taper_in_deg45.0
first_step_length0.0600 INCHES NOMINAL IN
seat_angle_in_deg30.0
surface_treatmentPASSIVATE
counterbore_length0.2610 INCHES NOMINAL IN
NSN5340-01-172-9501
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MC15909 MFR: Trust ⚠ 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
•
FSC APPLICATION DATA: ACFT HYD SYSTEM
•
FIRST STEP DIAMETER: 0.3800 INCHES NOMINAL IN
•
MATERIAL HARDNESS RATING: 77.7 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 82.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
•
END DIAMETER: 0.2330 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 30.0
•
DISTANCE FROM END TO FIRST STEP: 0.0590 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.3200 INCHES NOMINAL IN
COUNTERSINK ANGLE IN DEG45.0
FSC APPLICATION DATAACFT HYD SYSTEM
FIRST STEP DIAMETER0.3800 INCHES NOMINAL IN
MATERIAL HARDNESS RATING77.7 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 82.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
END DIAMETER0.2330 INCHES NOMINAL IN
SEAT ANGLE IN DEG30.0
DISTANCE FROM END TO FIRST STEP0.0590 INCHES NOMINAL IN
DESIGN TYPESOLID
SECOND STEP LENGTH0.0710 INCHES NOMINAL 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 MC15909?
MC15909 is a SEAT,HELICAL COMPRESSION SPRING manufactured by Trust.
What is the NSN for MC15909?
MC15909 is cataloged in the U.S. Government catalog under NSN 5340-01-172-9501. 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.