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21T91 — INJECTOR ASSEMBLY,FUEL

✓ Government record, cited
Dell · HOSE FITTING
PRODUCT OVERVIEW

21T91: INJECTOR ASSEMBLY,FUEL.

The INJECTOR ASSEMBLY,FUEL is a Dell industrial component. Key specifications include special_features: U/O HYDRAULIC UTILITY SYS OF 1F-5 ACFT. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-231-4592, 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
21T91
NSN: 4730-01-231-4592
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 76823 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN IS DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS (USA)
SPECIFICATIONS
special_featuresU/O HYDRAULIC UTILITY SYS OF 1F-5 ACFT
NSN4730-01-231-4592
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21T91 · Dell ⚠ 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 FEATURESU/O HYDRAULIC UTILITY SYS OF 1F-5 ACFT
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 2
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
21T191-6-6-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 21T91?
21T91 is a INJECTOR ASSEMBLY,FUEL manufactured by Dell.
What parts can replace 21T91?
There are 2 known substitutes for 21T91: AS18280, 21T191-6-6-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 21T91?
21T91 is cataloged in the U.S. Government catalog under NSN 4730-01-231-4592. This indicates validated use in U.S. government and defense supply chains.
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