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Technical Data Sheet
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QDH5SL4M — QDH5SL4M

✓ Government record, cited
AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC · HOSE FITTING
PRODUCT OVERVIEW

QDH5SL4M: QDH5SL4M.

The QDH5SL4M is a AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC industrial component. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-457-4863, 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
QDH5SL4M
NSN: 4730-01-457-4863
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 42905 — AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC (USA)
SPECIFICATIONS
Part NumberQDH5SL4M
ManufacturerAIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC
NSN4730-01-457-4863
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: QDH5SL4M · AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESWEAPONS CODE=LOS ANGELES CLASS SSN(688)
END ITEM IDENTIFICATION4540-01-437-4226
SUBSTITUTES & CROSS-REFERENCES 2
BB100NNS26Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
BB100NNS26 ITEM 45Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is QDH5SL4M?
QDH5SL4M is a QDH5SL4M manufactured by AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC.
What parts can replace QDH5SL4M?
There are 2 known substitutes for QDH5SL4M: BB100NNS26, BB100NNS26 ITEM 45. Substitute compatibility should be verified for your specific system.
What is the NSN for QDH5SL4M?
QDH5SL4M is cataloged in the U.S. Government catalog under NSN 4730-01-457-4863. 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.