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PartsTable / COMPONENT / 538550-11
538550-11 ✓ 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 PLUG,PRESSURE CHAMBER is a the manufacturer industrial component. Key specifications include end_item_identification: MODEL 53N FLOW TRANSMITTER W/NO. 2 ELEMENT, general_characteristics_item_description: STAINLESS STEEL.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-189-8140, 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
538550-11
NSN: 4730-01-189-8140
FSC: 4730
CAGE: 24821 — ROSEMOUNT ANALYTICAL, INC. DIV PROCESS ANALYTICAL DIVISION (USA)
SPECIFICATIONS
end_item_identificationMODEL 53N FLOW TRANSMITTER W/NO. 2 ELEMENT
general_characteristics_item_descriptionSTAINLESS STEEL
NSN4730-01-189-8140
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 538550-11 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STAINLESS STEEL
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONMODEL 53N FLOW TRANSMITTER W/NO. 2 ELEMENT
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTAINLESS STEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
138526Interchangeable
interchangeable cross-reference
interchangeable
MILW6986TYPEAInterchangeable
interchangeable cross-reference
interchangeable
TC15-1645Interchangeable
interchangeable cross-reference
interchangeable
2111-12Interchangeable
interchangeable cross-reference
interchangeable
61Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 538550-11?
538550-11 is a PLUG,PRESSURE CHAMBER.
What parts can replace 538550-11?
There are 5 known substitutes for 538550-11: 138526, MILW6986TYPEA, TC15-1645 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 538550-11?
538550-11 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-189-8140. 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