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A1803-1 — ADAPTER BUSHING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

A1803-1: ADAPTER BUSHING.

The ADAPTER BUSHING is a the manufacturer industrial component. Key specifications include material: STEEL, thickness: 0.500 INCHES NOMINAL IN, overall_length: 1.125 INCHES NOMINAL IN, surface_treatment: ZINC, width_across_flats: 1.750 INCHES NOMINAL IN, male_end_thread_size: 1-3/8-16. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-740-1014, 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
A1803-1
NSN: 4730-00-740-1014
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 46522 — DCM MANUFACTURING, INC. (USA)
SPECIFICATIONS
materialSTEEL
thickness0.500 INCHES NOMINAL IN
overall_length1.125 INCHES NOMINAL IN
surface_treatmentZINC
width_across_flats1.750 INCHES NOMINAL IN
male_end_thread_size1-3/8-16
male_end_thread_class2A A
female_end_thread_size1/2 IN.-14 IN
male_end_thread_length0.500 INCHES NOMINAL IN
female_end_thread_class3B
female_end_thread_length0.625 INCHES NOMINAL IN
wrenching_facility_shapeHEXAGON
NSN4730-00-740-1014
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A1803-1 · 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
•
WIDTH ACROSS FLATS: 1.750 INCHES NOMINAL IN
•
MALE END THREAD SIZE: 1-3/8-16
•
FEMALE END THREAD LENGTH: 0.625 INCHES NOMINAL IN
•
FEMALE END THREAD CLASS: 3B
•
MALE END THREAD DIRECTION: RIGHT-HAND
•
FEMALE END THREAD SIZE: 1/2 IN.-14 IN
•
WRENCHING FACILITY SHAPE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.750 INCHES NOMINAL IN
MALE END THREAD SIZE1-3/8-16
FEMALE END THREAD LENGTH0.625 INCHES NOMINAL IN
FEMALE END THREAD CLASS3B
OVERALL LENGTH1.125 INCHES NOMINAL IN
MALE END THREAD DIRECTIONRIGHT-HAND
FEMALE END THREAD SIZE1/2 IN.-14 IN
WRENCHING FACILITY SHAPEHEXAGON
MALE END SCREW THREAD SERIES DESIGNATORUN
SURFACE TREATMENTZINC
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
7401014Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A1803-1?
A1803-1 is a ADAPTER BUSHING.
What parts can replace A1803-1?
There is 1 known substitute for A1803-1: 7401014. Substitute compatibility should be verified for your specific system.
What is the NSN for A1803-1?
A1803-1 is cataloged in the U.S. Government catalog under NSN 4730-00-740-1014. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.