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Technical Data Sheet
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900538 — FLANGE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

900538: FLANGE,PIPE.

The FLANGE,PIPE is a the manufacturer industrial component. Key specifications include end_item_identification: NSN 1240-01-487-0870; PERISCOPE. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-483-1102, 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
900538
NSN: 4730-00-483-1102
NIINs: 004831102, 014877948
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 05779 — PARKER-HANNIFIN CORPORATION DBA HYDRAULIC FILTER DIVISION DIV HYDRAULIC & FUEL FILTER DIVISION (USA)
SPECIFICATIONS
end_item_identificationNSN 1240-01-487-0870; PERISCOPE
NSN4730-00-483-1102
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 900538 · 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
•
FLANGE WIDTH ACROSS FLATS: 4.000 INCHES MINIMUM AND 4.062 INCHES MAXIMUM IN
•
BOLT HOLE DIAMETER: 0.531 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 2.000 INCHES IN
•
REDUCER FLANGE HOLE TYPE: CONCENTRIC
•
RECESS DIAMETER: 2.500 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH: 3.062 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FACE SEATING SURFACE CONDITIONMACHINED
FLANGE WIDTH ACROSS FLATS4.000 INCHES MINIMUM AND 4.062 INCHES MAXIMUM IN
BOLT HOLE DIAMETER0.531 INCHES NOMINAL IN
NOMINAL THREAD SIZE2.000 INCHES IN
REDUCER FLANGE HOLE TYPECONCENTRIC
RECESS DIAMETER2.500 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH3.062 INCHES NOMINAL IN
RAISED FACE DIAMETER2.812 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORNPT
SUBSTITUTES & CROSS-REFERENCES 1
10921644Same 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
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FREQUENTLY ASKED QUESTIONS
What is 900538?
900538 is a FLANGE,PIPE.
What parts can replace 900538?
There is 1 known substitute for 900538: 10921644. Substitute compatibility should be verified for your specific system.
What is the NSN for 900538?
900538 is cataloged in the U.S. Government catalog under NSN 4730-00-483-1102. 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.