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Technical Data Sheet
PartsTable / COMPONENT / 13-D-020
13-D-020 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The COUPLING,SHAFT,FLEXIBLE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, thickness: 0.562 INCHES NOMINAL IN, neck_height: 0.438 INCHES NOMINAL IN, flange_diameter: 5.562 INCHES NOMINAL IN, special_features: MATERIAL IS NICKEL-COPPER PER QQ-N-281 SPEC;2 INCH, TYPE A, CLASS 1 IN, style_designator: ROUND, ONE BOLT HOLE CIRCLE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-256-8588, 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
13-D-020
NSN: 4730-00-256-8588
FSC: 4730
CAGE: 0ASY6 — DERBYSHIRE MARINE PRODUCTS, LLC DBA DERBYSHIRE MARINE PRODUCTS LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thickness0.562 INCHES NOMINAL IN
neck_height0.438 INCHES NOMINAL IN
flange_diameter5.562 INCHES NOMINAL IN
special_featuresMATERIAL IS NICKEL-COPPER PER QQ-N-281 SPEC;2 INCH, TYPE A, CLASS 1 IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.562 INCHES NOMINAL IN
bolt_hole_quantity6
nominal_thread_size2.000 INCHES IN
bolt_circle_diameter4.438 INCHES NOMINAL IN
flange_section_stylePLAIN FACE, RAISED NECK
thread_quantity_per_inch11-1/2
NSN4730-00-256-8588
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 13-D-020 · 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
•
BOLT HOLE QUANTITY: 6
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 2.000 INCHES IN
•
FLANGE DIAMETER: 5.562 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: MACHINED
•
MATERIAL: COPPER ALLOY
•
NOMINAL THREAD SIZE: 2.000 INCHES IN
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 1 CLASS
TECHNICAL CHARACTERISTICS (FLIS)
BOLT HOLE QUANTITY6
NOMINAL PIPE SIZE FOR WHICH DESIGNED2.000 INCHES IN
FLANGE DIAMETER5.562 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONMACHINED
MATERIALCOPPER ALLOY
NOMINAL THREAD SIZE2.000 INCHES IN
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
NONDEFINITIVE SPEC/STD DATAA TYPE AND 1 CLASS
SPECIAL FEATURESMATERIAL IS NICKEL-COPPER PER QQ-N-281 SPEC;2 INCH, TYPE A, CLASS 1 IN
OPERATING PRESSURE AND TYPE100.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
1205-0202Interchangeable
interchangeable cross-reference
interchangeable
509843-1Interchangeable
interchangeable cross-reference
interchangeable
AM938APS38AInterchangeable
interchangeable cross-reference
interchangeable
25940Interchangeable
interchangeable cross-reference
interchangeable
FG2020V RSBInterchangeable
interchangeable cross-reference
interchangeable
57-3206-2652PC54Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 13-D-020?
13-D-020 is a COUPLING,SHAFT,FLEXIBLE.
What parts can replace 13-D-020?
There are 24 known substitutes for 13-D-020: 1205-0202, 509843-1, AM938APS38A and 21 more. Substitute compatibility should be verified for your specific system.
Is 13-D-020 still available?
13-D-020 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026