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AN756D40 — FLANGE,PIPE,SWIVEL RETAINING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AN756D40: FLANGE,PIPE,SWIVEL RETAINING.

The FLANGE,PIPE,SWIVEL RETAINING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY, thickness: 0.297 INCHES NOMINAL IN, flange_width: 4.000 INCHES NOMINAL IN, socket_depth: 0.168 INCHES NOMINAL IN, recess_diameter: 3.291 INCHES NOMINAL IN, style_designator: SQUARE, ONE BOLT HOLE CIRCLE. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-640-5095, 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
AN756D40
NSN: 4730-00-640-5095
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
thickness0.297 INCHES NOMINAL IN
flange_width4.000 INCHES NOMINAL IN
socket_depth0.168 INCHES NOMINAL IN
recess_diameter3.291 INCHES NOMINAL IN
style_designatorSQUARE, ONE BOLT HOLE CIRCLE
surface_treatmentANODIZE
bolt_hole_diameter0.328 INCHES NOMINAL IN
bolt_hole_quantity6
bolt_circle_diameter3.812 INCHES NOMINAL IN
flange_section_stylePLAIN FACE, SOCKET NECK
specification/standard_data81349-MIL-F-5509 GOVERNMENT SPECIFICATION
NSN4730-00-640-5095
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN756D40 · 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
•
FACE SEATING SURFACE CONDITION: MACHINED
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 2 MIL SPEC 1ST TREATMENT RESPONSE
•
SOCKET DEPTH: 0.168 INCHES NOMINAL IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 2.500 INCHES NOMINAL IN
•
FLANGE SECTION STYLE: PLAIN FACE, SOCKET NECK
•
STYLE DESIGNATOR: SQUARE, ONE BOLT HOLE CIRCLE
•
BOLT HOLE DIAMETER: 0.328 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 81349-MIL-F-5509 GOVERNMENT SPECIFICATION
TECHNICAL CHARACTERISTICS
FACE SEATING SURFACE CONDITIONMACHINED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2 MIL SPEC 1ST TREATMENT RESPONSE
SOCKET DEPTH0.168 INCHES NOMINAL IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED2.500 INCHES NOMINAL IN
FLANGE SECTION STYLEPLAIN FACE, SOCKET NECK
STYLE DESIGNATORSQUARE, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.328 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA81349-MIL-F-5509 GOVERNMENT SPECIFICATION
RECESS DIAMETER3.291 INCHES NOMINAL IN
BOLT HOLE QUANTITY6
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 3
MS20756D40Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS4875Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-F-5509Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AN756D40?
AN756D40 is a FLANGE,PIPE,SWIVEL RETAINING.
What parts can replace AN756D40?
There are 3 known substitutes for AN756D40: MS20756D40, AS4875, MIL-F-5509. Substitute compatibility should be verified for your specific system.
What is the NSN for AN756D40?
AN756D40 is cataloged in the U.S. Government catalog under NSN 4730-00-640-5095. 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.