PartsTable
Technical Data Sheet
Download PDF

AS1737D56 — FERRULE,SWAGE,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS1737D56: FERRULE,SWAGE,TUBE COUPLING.

The FERRULE,SWAGE,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY, slot_depth: 0.136 INCHES NOMINAL IN, special_features: FLANGED END HAS 4 DRILLED HOLES 0.052 IN. IN, style_designator: SINGLE FLANGE, flange_inside_diameter: 3.479 INCHES NOMINAL IN, casehardening_indicator: NOT CASEHARDENED.

This part is cataloged in the U.S. Government catalog under NSN 4730-01-332-8720, 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
AS1737D56
NSN: 4730-01-332-8720
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
slot_depth0.136 INCHES NOMINAL IN
slot_quantity5
special_featuresFLANGED END HAS 4 DRILLED HOLES 0.052 IN. IN
style_designatorSINGLE FLANGE
flange_inside_diameter3.479 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
flange_outside_diameter3.869 INCHES NOMINAL IN
sleeve_outside_diameter3.645 INCHES NOMINAL IN
nondefinitive_spec/std_data56 SIZE
specification/standard_data81343-AS1737 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
hose/tube_outside_diameter_for_which_designed3.500 INCHES NOMINAL IN
NSN4730-01-332-8720
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS1737D56 · 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
•
SLOT QUANTITY: 5
•
STYLE DESIGNATOR: SINGLE FLANGE
•
FLANGE INSIDE DIAMETER: 3.479 INCHES NOMINAL IN
•
SLEEVE OUTSIDE DIAMETER: 3.645 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 81343-AS1737 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
NONDEFINITIVE SPEC/STD DATA: 56 SIZE
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
SLOT DEPTH: 0.136 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SLOT QUANTITY5
STYLE DESIGNATORSINGLE FLANGE
FLANGE INSIDE DIAMETER3.479 INCHES NOMINAL IN
SLEEVE OUTSIDE DIAMETER3.645 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA81343-AS1737 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NONDEFINITIVE SPEC/STD DATA56 SIZE
CASEHARDENING INDICATORNOT CASEHARDENED
SLOT DEPTH0.136 INCHES NOMINAL IN
SPECIAL FEATURESFLANGED END HAS 4 DRILLED HOLES 0.052 IN. IN
MATERIALALUMINUM ALLOY
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
SAE-AS1730Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy AS1737D56?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is AS1737D56?
AS1737D56 is a FERRULE,SWAGE,TUBE COUPLING.
What parts can replace AS1737D56?
There is 1 known substitute for AS1737D56: SAE-AS1730. Substitute compatibility should be verified for your specific system.
What is the NSN for AS1737D56?
AS1737D56 is cataloged in the U.S. Government catalog under NSN 4730-01-332-8720. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — AS1737D56

✓ 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.