PartsTable
Technical Data Sheet
Download PDF

2621-228-02 — ADAPTER,STRAIGHT,FLANGE TO TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2621-228-02: ADAPTER,STRAIGHT,FLANGE TO TUBE.

ADAPTER,STRAIGHT,FLANGE TO TUBE. Key specifications include material: STEEL COMP 304, thickness: 0.460 INCHES NOMINAL IN, neck_height: 1.100 INCHES NOMINAL IN, socket_depth: 0.625 INCHES NOMINAL IN, bore_diameter: 3.358 INCHES NOMINAL IN, neck_diameter: 1.938 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-087-6253, 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
2621-228-02
NSN: 4730-01-087-6253
NIINs: 010876253, 011370381, 011370382, 011370383, 011370384, 011370385, 011386114, 011463108, 011464115, 011471341, 011550221, 011989590, 012815924, 012815925, 013074760, 013098147, 013142138, 013185435, 013185436, 013188465, 013188468, 013188469, 013188470, 013192766, 013264538, 013503847
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialSTEEL COMP 304
thickness0.460 INCHES NOMINAL IN
neck_height1.100 INCHES NOMINAL IN
socket_depth0.625 INCHES NOMINAL IN
bore_diameter3.358 INCHES NOMINAL IN
neck_diameter1.938 INCHES NOMINAL IN
flange_diameter8.000 INCHES NOMINAL IN
socket_diameter3.500 INCHES NOMINAL IN
face_bevel_angle15.0 DEGREES NOMINAL
special_featuresBEVELED FACE
style_designatorROUND, ONE BOLT HOLE CIRCLE
surface_treatmentCHROMATE
NSN4730-01-087-6253
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2621-228-02 · 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
•
SOCKET DIAMETER: 1.910 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: MACHINED
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 1.500 INCHES IN
•
SOCKET DEPTH: 0.620 INCHES NOMINAL IN
•
FLANGE SECTION STYLE: RAISED FACE SOCKET NECK (BULK HEAD)
•
STYLE DESIGNATOR: SQUARE, ONE BOLT HOLE CIRCLE
•
BOLT HOLE DIAMETER: 0.531 INCHES NOMINAL IN
•
NECK HEIGHT: 1.150 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SOCKET DIAMETER1.910 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONMACHINED
NOMINAL PIPE SIZE FOR WHICH DESIGNED1.500 INCHES IN
SOCKET DEPTH0.620 INCHES NOMINAL IN
FLANGE SECTION STYLERAISED FACE SOCKET NECK (BULK HEAD)
STYLE DESIGNATORSQUARE, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.531 INCHES NOMINAL IN
NECK HEIGHT1.150 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,CL 304,CONDITION A FED SPEC SINGLE MATERIAL RESPONSE
FEATURES PROVIDEDO RING
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 2
845-4687676Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
845-4687676ASSY51M0DSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 2621-228-02?
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 2621-228-02?
2621-228-02 is a ADAPTER,STRAIGHT,FLANGE TO TUBE.
What parts can replace 2621-228-02?
There are 2 known substitutes for 2621-228-02: 845-4687676, 845-4687676ASSY51M0D. Substitute compatibility should be verified for your specific system.
What is the NSN for 2621-228-02?
2621-228-02 is cataloged in the U.S. Government catalog under NSN 4730-01-087-6253. 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 — 2621-228-02

✓ 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.