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55740-1 — PLUG,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

55740-1: PLUG,EXPANSION.

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include special_features: CAM ASSY, SLEEVE, WASHER, CRES STEEL 300 SERIES; NEOPRENE RUBBER TO FIT 3.00 IN. I.D.

IN. This part is cataloged in the U.S. Government catalog under NSN 5340-01-103-8083, 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
55740-1
NSN: 5340-01-103-8083
FSC: 5340 — Hardware, Commercial
CAGE: 59647 — SHAW DEVELOPMENT, LLC (USA)
SPECIFICATIONS
special_featuresCAM ASSY, SLEEVE, WASHER, CRES STEEL 300 SERIES; NEOPRENE RUBBER TO FIT 3.00 IN. I.D. IN
NSN5340-01-103-8083
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 55740-1 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESCAM ASSY, SLEEVE, WASHER, CRES STEEL 300 SERIES; NEOPRENE RUBBER TO FIT 3.00 IN. I.D. 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 2
EXP5-5694-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
5428014Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 55740-1?
55740-1 is a PLUG,EXPANSION.
What parts can replace 55740-1?
There are 2 known substitutes for 55740-1: EXP5-5694-1, 5428014. Substitute compatibility should be verified for your specific system.
What is the NSN for 55740-1?
55740-1 is cataloged in the U.S. Government catalog under NSN 5340-01-103-8083. 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.