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D2021 — Technical Data Sheet

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— · 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

DRIVE,ENGINE,ELECTRICAL STARTER. Key specifications include special_features: GEAR DRIVEN; SPRING ACTUATED, end_item_identification: 3930-01-158-0849, criticality_code_justification: ZZZY, reference_number_differentiating_characteristics: QUALITY ASSURANCE TESTED FOR SUBMARINE ANTENNA APPLICATION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-01-128-9216, 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
D2021
NSN: 4730-01-128-9216
FSC: 4730
CAGE: 30793 — INSINGER MACHINE CO (USA)
SPECIFICATIONS
special_featuresGEAR DRIVEN; SPRING ACTUATED
end_item_identification3930-01-158-0849
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsQUALITY ASSURANCE TESTED FOR SUBMARINE ANTENNA APPLICATION
NSN4730-01-128-9216
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: D2021 · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESSTAINLESS STEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
12F22C2148AAF4C05InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
50 SA10GInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8210G009InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
WW-P-460InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS14310-5InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS14310-5AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D2021?
D2021 is a DRIVE,ENGINE,ELECTRICAL STARTER.
What parts can replace D2021?
There are 18 known substitutes for D2021: 12F22C2148AAF4C05, 50 SA10G, 8210G009 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D2021?
D2021 is cataloged in the Federal Logistics Information System under NSN 4730-01-128-9216. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026