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Technical Data Sheet
PartsTable / COMPONENT / 04-21259
04-21259 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The NIPPLE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_item_identification: 6115-01-561-7718 GENERATOR SET, DIESEL ENGINE; LOGISTICS SUPPORT VESSEL, material_document_and_classification: ASTM A53 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A733 ASSN STD SINGLE MATERIAL RESPONSE OVERALL, part_name_assigned_by_controlling_agency: FITTING, NIPPLE 1/8-27 INCH NPT IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-599-2855, 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
04-21259
NSN: 4730-01-599-2855
FSC: 4730
CAGE: 30554 — DEPARTMENT OF DEFENSE PROJECT MANAGER-MOBILE ELECTRIC POWER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_item_identification6115-01-561-7718 GENERATOR SET, DIESEL ENGINE; LOGISTICS SUPPORT VESSEL
material_document_and_classificationASTM A53 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A733 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyFITTING, NIPPLE 1/8-27 INCH NPT IN
NSN4730-01-599-2855
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 04-21259 · 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
•
MATERIAL: STEEL OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A53 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A733 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATION6115-01-561-7718 GENERATOR SET, DIESEL ENGINE; LOGISTICS SUPPORT VESSEL
PART NAME ASSIGNED BY CONTROLLING AGENCYFITTING, NIPPLE 1/8-27 INCH NPT IN
MATERIALSTEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A53 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A733 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
105404Interchangeable
interchangeable cross-reference
interchangeable
6V1813Interchangeable
interchangeable cross-reference
interchangeable
030082Interchangeable
interchangeable cross-reference
interchangeable
MS51953-1BInterchangeable
Same NIIN cross-reference
interchangeable
ASTM-A733Interchangeable
Same NIIN cross-reference
interchangeable
WWN351Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 04-21259?
04-21259 is a NIPPLE,PIPE.
What parts can replace 04-21259?
There are 6 known substitutes for 04-21259: 105404, 6V1813, 030082 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 04-21259?
04-21259 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-599-2855. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026