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243974 — TUBE,AIR RETURN

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

243974: TUBE,AIR RETURN.

The TUBE,AIR RETURN is a the manufacturer industrial component. Key specifications include end_item_identification: AIRCRAFT MODEL F-18, general_characteristics_item_description: ALUMINUM ALLOY PER MIL-T-7081; ANODIZE PER MIL-A-8625,TYPE 2,CLASS 1; 1.090 IN. LG; 0.375 IN.

DIA IN. This part is cataloged in the U.S. Government catalog under NSN 4820-01-083-2508, 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
243974
NSN: 4820-01-083-2508
NIINs: 010832508, 011872192
FSC: 4820 — Valves, Nonpowered
CAGE: 06853 — BENDIX COMMERCIAL VEHICLE SYSTEMS LLC DBA BENDIX COMMERCIAL VEHICLE SYSTEMS (USA)
SPECIFICATIONS
end_item_identificationAIRCRAFT MODEL F-18
general_characteristics_item_descriptionALUMINUM ALLOY PER MIL-T-7081; ANODIZE PER MIL-A-8625,TYPE 2,CLASS 1; 1.090 IN. LG; 0.375 IN. DIA IN
NSN4820-01-083-2508
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 243974 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTSIDE DIAMETER: 4.140 INCHES NOMINAL IN
•
INSIDE DIAMETER: 3.500 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER4.140 INCHES NOMINAL IN
INSIDE DIAMETER3.500 INCHES NOMINAL IN
MATERIALALUMINUM
SUBSTITUTES & CROSS-REFERENCES 1
2WR87Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 243974?
243974 is a TUBE,AIR RETURN.
What parts can replace 243974?
There is 1 known substitute for 243974: 2WR87. Substitute compatibility should be verified for your specific system.
What is the NSN for 243974?
243974 is cataloged in the U.S. Government catalog under NSN 4820-01-083-2508. 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.