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Technical Data Sheet
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W138326 ✓ 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, construction: SEAMLESS, connection_type: THREADED EXTERNAL PIPE ALL ENDS, first_end_style: THREADED EXTERNAL, connection_style: PLAIN (PIPE) ALL ENDS, special_features: 0.109 IN. WALL THK;0.840 IN.

OD IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-8890, 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
W138326
NSN: 4730-00-277-8890
FSC: 4730
CAGE: 88663 — DRESSER-RAND CO INGERSOLL-RAND OPNS A JOINT VENTURE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
constructionSEAMLESS
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
first_end_styleTHREADED EXTERNAL
connection_stylePLAIN (PIPE) ALL ENDS
special_features0.109 IN. WALL THK;0.840 IN. OD IN
style_designatorLONG
surface_treatmentOXIDE OVERALL
nominal_thread_size0.500 INCHES ALL ENDS IN
nominal_overall_length5.250 INCHES IN
first_end_thread_seriesNPT
thread_series_designatorNPT ALL ENDS
NSN4730-00-277-8890
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: W138326 · 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
•
SURFACE TREATMENT: OXIDE OVERALL
•
STYLE DESIGNATOR: LONG
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 3.500 INCHES IN
•
SPECIFICATION/STANDARD DATA: 81346-ASTM A733-3 1/2-1 1/2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 1.500 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTOXIDE OVERALL
STYLE DESIGNATORLONG
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
NOMINAL OVERALL LENGTH3.500 INCHES IN
SPECIFICATION/STANDARD DATA81346-ASTM A733-3 1/2-1 1/2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A120 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE1.500 INCHES ALL ENDS IN
NONDEFINITIVE SPEC/STD DATALONG TYPE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
219375Interchangeable
interchangeable cross-reference
interchangeable
219378Interchangeable
interchangeable cross-reference
interchangeable
W138326Interchangeable
interchangeable cross-reference
interchangeable
W138326P8Interchangeable
interchangeable cross-reference
interchangeable
W138326P13Interchangeable
interchangeable cross-reference
interchangeable
W138326P11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is W138326?
W138326 is a NIPPLE,PIPE.
What parts can replace W138326?
There are 14 known substitutes for W138326: 219375, 219378, W138326 and 11 more. Substitute compatibility should be verified for your specific system.
Is W138326 still available?
W138326 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