PartsTable
Technical Data Sheet
D-21A ✓ 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 CAP,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 838 OR COPPER ALLOY OVERALL, connection_style: PLAIN (OPTIONAL END), special_features: POLISHED OUTSIDE SURFACE, style_designator: CAP, thread_direction: RIGHT-HAND INTERNAL, nominal_thread_size: 0.750 INCHES INTERNAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-231-2386, 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
D-21A
NSN: 4730-00-231-2386
FSC: 4730
CAGE: 30793 — INSINGER MACHINE CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY 838 OR COPPER ALLOY OVERALL
connection_stylePLAIN (OPTIONAL END)
special_featuresPOLISHED OUTSIDE SURFACE
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
nominal_thread_size0.750 INCHES INTERNAL IN
thread_series_designatorNPT INTERNAL
specification/standard_data81348-WW-P-460 GOVERNMENT SPECIFICATION AND 96906-MS14310 GOVERNMENT STANDARD
material_document_and_classificationQQ-C-390,C+3 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM B145 AL 4B ASSN STD SINGLE MATERIAL RESPONSE OVERALL
nominal_pipe_size_for_which_designed0.750 INCHES IN
NSN4730-00-231-2386
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: D-21A · 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
CONNECTION STYLE: PLAIN (OPTIONAL END)
THREAD DIRECTION: RIGHT-HAND INTERNAL
STYLE DESIGNATOR: CAP
MATERIAL: COPPER ALLOY 838 OR COPPER ALLOY OVERALL
THREAD SERIES DESIGNATOR: NPT INTERNAL
SPECIFICATION/STANDARD DATA: 81348-WW-P-460 GOVERNMENT SPECIFICATION AND 96906-MS14310 GOVERNMENT STANDARD
NOMINAL THREAD SIZE: 0.750 INCHES INTERNAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEPLAIN (OPTIONAL END)
SPECIAL FEATURESPOLISHED OUTSIDE SURFACE
THREAD DIRECTIONRIGHT-HAND INTERNAL
STYLE DESIGNATORCAP
MATERIALCOPPER ALLOY 838 OR COPPER ALLOY OVERALL
THREAD SERIES DESIGNATORNPT INTERNAL
SPECIFICATION/STANDARD DATA81348-WW-P-460 GOVERNMENT SPECIFICATION AND 96906-MS14310 GOVERNMENT STANDARD
NOMINAL THREAD SIZE0.750 INCHES INTERNAL IN
NOMINAL PIPE SIZE FOR WHICH DESIGNED0.750 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390,C+3 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM B145 AL 4B ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
50A2481Interchangeable
interchangeable cross-reference
interchangeable
MS51952-1Interchangeable
interchangeable cross-reference
interchangeable
12F22C2148AAF4C05Interchangeable
interchangeable cross-reference
interchangeable
50 SA10GInterchangeable
interchangeable cross-reference
interchangeable
8210G009Interchangeable
interchangeable cross-reference
interchangeable
WWP460CLASSAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D-21A?
D-21A is a CAP,PIPE.
What parts can replace D-21A?
There are 21 known substitutes for D-21A: 50A2481, MS51952-1, 12F22C2148AAF4C05 and 18 more. Substitute compatibility should be verified for your specific system.
Is D-21A still available?
D-21A is currently cancelled.
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