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3408A55 — PLUNGER,DETENT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3408A55: PLUNGER,DETENT.

The PLUNGER,DETENT is a the manufacturer industrial component. Key specifications include length: 0.072 INCHES NOMINAL KNOB IN, diameter: 0.281 INCHES NOMINAL KNOB IN, material: STEEL CORROSION RESISTING OVERALL, special_features: NOSE FORCE EXTENDED 6 POUNDS, COMPRESSED 12 LBS, part_name_assigned_by_controlling_agency: SLOTTED SPRING PLUNGER. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-691-5916, 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
3408A55
NSN: 5340-01-691-5916
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
length0.072 INCHES NOMINAL KNOB IN
diameter0.281 INCHES NOMINAL KNOB IN
materialSTEEL CORROSION RESISTING OVERALL
special_featuresNOSE FORCE EXTENDED 6 POUNDS, COMPRESSED 12 LBS
part_name_assigned_by_controlling_agencySLOTTED SPRING PLUNGER
NSN5340-01-691-5916
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3408A55 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
•
LENGTH: 0.072 INCHES NOMINAL KNOB IN
•
DIAMETER: 0.281 INCHES NOMINAL KNOB IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
LENGTH0.072 INCHES NOMINAL KNOB IN
LENGTH0.75 INCHES NOMINAL PLUNGER IN
DIAMETER0.281 INCHES NOMINAL KNOB IN
SPECIAL FEATURESNOSE FORCE EXTENDED 6 POUNDS, COMPRESSED 12 LBS
PART NAME ASSIGNED BY CONTROLLING AGENCYSLOTTED SPRING PLUNGER
MATERIALSTEEL CORROSION RESISTING OVERALL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3408A55?
3408A55 is a PLUNGER,DETENT.
What is the NSN for 3408A55?
3408A55 is cataloged in the U.S. Government catalog under NSN 5340-01-691-5916. 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.