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PartsTable / COMPONENT / ASTM-733
ASTM-733 ✓ 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

RESISTOR,FIXED,WIRE WOUND,INDUCT. Key specifications include material: STEEL OVERALL, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: CLOSE, nominal_thread_size: 0.500 INCHES ALL ENDS IN, nominal_overall_length: 10.000 INCHES 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 4730-00-188-1890, 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
ASTM-733
NSN: 4730-00-188-1890
FSC: 4730
CAGE: 81346 — AMERICAN SOCIETY FOR TESTING AND MATERIALS DBA ASTM INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL OVERALL
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorCLOSE
nominal_thread_size0.500 INCHES ALL ENDS IN
nominal_overall_length10.000 INCHES IN
thread_series_designatorNPT ALL ENDS
specification/standard_data81346-ASTM-733 GOVERNMENT SPECIFICATION
NSN4730-00-188-1890
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ASTM-733 · 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
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
•
NOMINAL OVERALL LENGTH: 10.000 INCHES IN
•
SPECIFICATION/STANDARD DATA: 81346-ASTM-733 GOVERNMENT SPECIFICATION
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
NOMINAL OVERALL LENGTH10.000 INCHES IN
SPECIFICATION/STANDARD DATA81346-ASTM-733 GOVERNMENT SPECIFICATION
THREAD SERIES DESIGNATORNPT ALL ENDS
SPECIFICATION/STANDARD DATA81346-ASTM-733 GOVERNMENT SPECIFICATION
NOMINAL OVERALL LENGTH10.000 INCHES IN
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
THREAD SERIES DESIGNATORNPT ALL ENDS
STYLE DESIGNATORCLOSE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
G355639Interchangeable
interchangeable cross-reference
interchangeable
8787Interchangeable
interchangeable cross-reference
interchangeable
27591Interchangeable
interchangeable cross-reference
interchangeable
219337Interchangeable
interchangeable cross-reference
interchangeable
995-3A2R4JInterchangeable
interchangeable cross-reference
interchangeable
352250013721Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ASTM-733?
ASTM-733 is a RESISTOR,FIXED,WIRE WOUND,INDUCT.
What parts can replace ASTM-733?
There are 9 known substitutes for ASTM-733: G355639, 8787, 27591 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ASTM-733?
ASTM-733 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-188-1890. 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.
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Last verified: July 2026