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Technical Data Sheet
PartsTable / COMPONENT / LS3901-14
LS3901-14 ✓ 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 ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, nut_style: TUBE COUPLING, nut_height: 1.220 INCHES NOMINAL IN, seat_angle: 37.0 DEGREES NOMINAL, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT (UNJ). This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-555-2895, 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
LS3901-14
NSN: 4730-00-555-2895
FSC: 4730
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
nut_styleTUBE COUPLING
nut_height1.220 INCHES NOMINAL IN
seat_angle37.0 DEGREES NOMINAL
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
fabrication_methodMACHINED OR FORGED
length_to_shoulder1.017 INCHES NOMINAL IN
width_across_flats2.000 INCHES NOMINAL IN
nominal_thread_size1.625 INCHES IN
NSN4730-00-555-2895
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: LS3901-14 · 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
•
SMALLEST INSIDE DIAMETER: 1.347 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 88044-AN818 GOVERNMENT STANDARD
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL COMP 304 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
NUT HEIGHT: 1.220 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 12
TECHNICAL CHARACTERISTICS (FLIS)
SMALLEST INSIDE DIAMETER1.347 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA88044-AN818 GOVERNMENT STANDARD
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 304 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NUT HEIGHT1.220 INCHES NOMINAL IN
THREAD QUANTITY PER INCH12
THREAD DIRECTIONRIGHT-HAND
FABRICATION METHODMACHINED OR FORGED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
1412M15P02Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-18866Interchangeable
interchangeable cross-reference
interchangeable
12BTXSSInterchangeable
interchangeable cross-reference
interchangeable
11240409-5Interchangeable
interchangeable cross-reference
interchangeable
3-2149-7Interchangeable
interchangeable cross-reference
interchangeable
A318Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LS3901-14?
LS3901-14 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace LS3901-14?
There are 30 known substitutes for LS3901-14: 1412M15P02, MIL-F-18866, 12BTXSS and 27 more. Substitute compatibility should be verified for your specific system.
Is LS3901-14 still available?
LS3901-14 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026