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Technical Data Sheet
PartsTable / COMPONENT / 91-556-1-001
91-556-1-001 ✓ 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 PARTS KIT,NOZZLE WEB is a the manufacturer industrial component. Key specifications include end_item_identification: USNS HENRY J. KAISER CLASS TAO.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-171-7185, 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
91-556-1-001
NSN: 4730-01-171-7185
FSC: 4730
CAGE: 54578 — GRINNELL CORP SUB OF TYCO INTL US INC (USA)
SPECIFICATIONS
end_item_identificationUSNS HENRY J. KAISER CLASS TAO
general_characteristics_item_descriptionCONSIST OF;1/2 INCH THREE-PRONGED NUT 1,1/2 INCH ROUND HEAD SCREW 1,1/2 INCH FLAT WASHER 1,1/2 INCH CRES BALL 1,1/2 INCH ID HELICAL INSERT IN
NSN4730-01-171-7185
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 91-556-1-001 · 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: CONSIST OF;1/2 INCH THREE-PRONGED NUT 1,1/2 INCH ROUND HEAD SCREW 1,1/2 INCH FLAT WASHER 1,1/2 INCH CRES BALL 1,1/2 INCH ID HELICAL INSERT IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCONSIST OF;1/2 INCH THREE-PRONGED NUT 1,1/2 INCH ROUND HEAD SCREW 1,1/2 INCH FLAT WASHER 1,1/2 INCH CRES BALL 1,1/2 INCH ID HELICAL INSERT IN
END ITEM IDENTIFICATIONUSNS HENRY J. KAISER CLASS TAO
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
12338Interchangeable
interchangeable cross-reference
interchangeable
123-0038Interchangeable
interchangeable cross-reference
interchangeable
20665001-8Interchangeable
interchangeable cross-reference
interchangeable
80EA1C1F2RGL17N16N0G0G0Interchangeable
interchangeable cross-reference
interchangeable
105481Interchangeable
interchangeable cross-reference
interchangeable
10615Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91-556-1-001?
91-556-1-001 is a PARTS KIT,NOZZLE WEB.
What parts can replace 91-556-1-001?
There are 13 known substitutes for 91-556-1-001: 12338, 123-0038, 20665001-8 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91-556-1-001?
91-556-1-001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-171-7185. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026