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Technical Data Sheet
PartsTable / COMPONENT / 10557566
10557566 ✓ 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,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OR COPPER ALLOY 345 OR COPPER ALLOY 350 OR COPPER ALLOY 377 TEE, nut_style: TUBE COUPLING, flow_angle: 90.0 DEGREES, leg_length: 1.00 INCHES NOMINAL FIRST END IN, nut_height: 0.880 INCHES NOMINAL IN, seat_angle: 45.0 DEGREES FIRST END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-7775, 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
10557566
NSN: 4730-00-277-7775
FSC: 4730
CAGE: 56161 — GENERAL DYNAMICS LAND SYSTEMS CANADACORP (CAN)
SPECIFICATIONS
materialCOPPER ALLOY 360 OR COPPER ALLOY 345 OR COPPER ALLOY 350 OR COPPER ALLOY 377 TEE
nut_styleTUBE COUPLING
flow_angle90.0 DEGREES
leg_length1.00 INCHES NOMINAL FIRST END IN
nut_height0.880 INCHES NOMINAL IN
seat_angle45.0 DEGREES FIRST END
head_height0.340 INCHES NOMINAL IN
thread_size11/16-18
thread_class2A FIRST END A
physical_formLIQUID
thread_seriesUNF
overall_length0.680 INCHES NOMINAL IN
NSN4730-00-277-7775
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 10557566 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
A149Interchangeable
interchangeable cross-reference
interchangeable
278-2116-010Interchangeable
interchangeable cross-reference
interchangeable
777Interchangeable
interchangeable cross-reference
interchangeable
4659Interchangeable
interchangeable cross-reference
interchangeable
9K7951Interchangeable
interchangeable cross-reference
interchangeable
8106068Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10557566?
10557566 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 10557566?
There are 12 known substitutes for 10557566: A149, 278-2116-010, 777 and 9 more. Substitute compatibility should be verified for your specific system.
Is 10557566 still available?
10557566 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