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DF2740-2540 FN 5L1 — PLUG,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

DF2740-2540 FN 5L1: PLUG,PIPE.

The PLUG,PIPE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, nominal_thread_size: 1.125 INCHES EXTERNAL IN, thread_series_designator: UNF EXTERNAL, criticality_code_justification: ZZZY, material_document_and_classification: QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE BODY. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-395-4636, 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
DF2740-2540 FN 5L1
NSN: 4730-01-395-4636
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
nominal_thread_size1.125 INCHES EXTERNAL IN
thread_series_designatorUNF EXTERNAL
criticality_code_justificationZZZY
material_document_and_classificationQQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE BODY
reference_number_differentiating_characteristicsQUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
NSN4730-01-395-4636
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: DF2740-2540 FN 5L1 · OEM ⚠ 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
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
NOMINAL THREAD SIZE: 1.125 INCHES EXTERNAL IN
•
MATERIAL: NICKEL ALLOY OVERALL
•
THREAD SERIES DESIGNATOR: UNF EXTERNAL
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE BODY
NOMINAL THREAD SIZE1.125 INCHES EXTERNAL IN
MATERIALNICKEL ALLOY OVERALL
THREAD SERIES DESIGNATORUNF EXTERNAL
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSQUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
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 3
211066721Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
DF2740-2540 FN 5Reference document
Same NSN cross-reference
Reference document — Secondary reference
211066721L1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is DF2740-2540 FN 5L1?
DF2740-2540 FN 5L1 is a PLUG,PIPE.
What parts can replace DF2740-2540 FN 5L1?
There are 3 known substitutes for DF2740-2540 FN 5L1: 211066721, DF2740-2540 FN 5, 211066721L1. Substitute compatibility should be verified for your specific system.
What is the NSN for DF2740-2540 FN 5L1?
DF2740-2540 FN 5L1 is cataloged in the U.S. Government catalog under NSN 4730-01-395-4636. 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.