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20749 — TUBE ASSY

✓ Government record, cited
Legrand · ORING SEAL
PRODUCT OVERVIEW

20749: TUBE ASSY.

With a large sign in his hand and a really guilty conscience, a blue friend says: “Sorry – I feel very bad about it! Can you forgive me?” - Fun Fact : “I am truly sorry”. Key specifications include height: 0.390 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN, material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, inside_diameter: 0.875 INCHES NOMINAL IN, outside_diameter: 1.250 INCHES NOMINAL IN, end_item_identification: 4210-01-5669-6073 FIRE SUPPRESSION SYSTEM (FSS), cross-sectional_shape_style: V INTERMEDIATE RING.

This part is cataloged in the U.S. Government catalog under NSN 5330-00-178-7683, 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
20749
NSN: 5330-00-178-7683
NIINs: 001787683, 009369392, 009428399, 015278773, 015955475
FSC: 5330 — Packing and Gasket Materials
CAGE: 01425 — LOUIS ALLIS CO THE THIS COMPANY HAS GONE BANKRUPT AND HAS BEEN PURCHASED BY 3 COMPANIES (USA)
SPECIFICATIONS
height0.390 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
inside_diameter0.875 INCHES NOMINAL IN
outside_diameter1.250 INCHES NOMINAL IN
special_featuresPACKING ASSY COMPRISED OF 2 MALE RINGS (THICKNESS OF 0.073 IN & P/N 01151), 2 FEMALE RINGS (THICKNESS OF 0.187 IN & P/N 01152), & 2 VEE/ INTERMEDIATE RINGS (THICKNESS OF 0.083 IN & P/N 01150) IN
end_item_identification4210-01-5669-6073 FIRE SUPPRESSION SYSTEM (FSS)
intermediate_ring_quantity2
cross-sectional_shape_styleV INTERMEDIATE RING
part_name_assigned_by_controlling_agencyPACKING SET - STANDARD VEE, 0.88 IN STEM IN
NSN5330-00-178-7683
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 20749 MFR: Legrand ⚠ 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
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
SUBSTITUTES & CROSS-REFERENCES 2
20749WReference document
Same NSN cross-reference
Reference document — Design control — primary reference
15S190PC54Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20749?
20749 is a TUBE ASSY manufactured by Legrand.
What parts can replace 20749?
There are 2 known substitutes for 20749: 20749W, 15S190PC54. Substitute compatibility should be verified for your specific system.
What is the NSN for 20749?
20749 is cataloged in the U.S. Government catalog under NSN 5330-00-178-7683. This indicates validated use in U.S. government and defense supply chains.
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