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801-6640811PC21 — ADAPTER,STRAIGHT,FLANGE TO FLANG

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

801-6640811PC21: ADAPTER,STRAIGHT,FLANGE TO FLANG.

ADAPTER,STRAIGHT,FLANGE TO FLANG. Key specifications include material: STEEL CORROSION RESISTING OVERALL, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, special_features: ONE END THD INTERNAL 4.750-12UN-2B, nominal_thickness: 1.250 INCHES ALL ENDS IN, bolt_hole_quantity: 8 ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-367-4815, 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
801-6640811PC21
NSN: 4730-01-367-4815
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
special_featuresONE END THD INTERNAL 4.750-12UN-2B
nominal_thickness1.250 INCHES ALL ENDS IN
bolt_hole_quantity8 ALL ENDS
flange_face_designRAISED STRAIGHT ALL ENDS
operating_pressure160.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
maximum_operating_temp228.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length10.000 INCHES IN
nominal_outside_diameter8.500 INCHES ALL ENDS IN
bolt_hole_nominal_diameter0.750 INCHES ALL ENDS IN
NSN4730-01-367-4815
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 801-6640811PC21 · 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
•
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
•
FLANGE FACE DESIGN: RAISED STRAIGHT ALL ENDS
•
BOLT CIRCLE NOMINAL DIAMETER: 7.000 INCHES ALL ENDS IN
•
NOMINAL OVERALL LENGTH: 10.000 INCHES IN
•
CONNECTION TYPE: FLANGE ALL ENDS
•
BOLT HOLE NOMINAL DIAMETER: 0.750 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 160.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MAXIMUM OPERATING TEMP: 228.0 FAHRENHEIT SINGLE RESPONSE DEGF
TECHNICAL CHARACTERISTICS
FLANGE SHAPEROUND WITH HOLES ALL ENDS
FLANGE FACE DESIGNRAISED STRAIGHT ALL ENDS
BOLT CIRCLE NOMINAL DIAMETER7.000 INCHES ALL ENDS IN
NOMINAL OVERALL LENGTH10.000 INCHES IN
CONNECTION TYPEFLANGE ALL ENDS
BOLT HOLE NOMINAL DIAMETER0.750 INCHES ALL ENDS IN
OPERATING PRESSURE160.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MAXIMUM OPERATING TEMP228.0 FAHRENHEIT SINGLE RESPONSE DEGF
NOMINAL OUTSIDE DIAMETER8.500 INCHES ALL ENDS IN
BOLT HOLE QUANTITY8 ALL ENDS
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
6640811Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 801-6640811PC21?
801-6640811PC21 is a ADAPTER,STRAIGHT,FLANGE TO FLANG.
What parts can replace 801-6640811PC21?
There is 1 known substitute for 801-6640811PC21: 6640811. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6640811PC21?
801-6640811PC21 is cataloged in the U.S. Government catalog under NSN 4730-01-367-4815. 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.