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MS21913D2 — PLUG,TUBE FITTING,THREADED

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS21913D2: PLUG,TUBE FITTING,THREADED.

The PLUG,TUBE FITTING,THREADED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, seat_angle: 6.0 DEGREES, head_height: 0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN, thread_class: 3A EXTERNAL A, overall_length: 0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN, connection_style: FLARELESS. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-540-2231, 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
MS21913D2
NSN: 4730-00-540-2231
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
seat_angle6.0 DEGREES
head_height0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
thread_class3A EXTERNAL A
overall_length0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
connection_styleFLARELESS
style_designatorPLUG, TUBE FITTING FLARELESS (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
thread_directionRIGHT-HAND EXTERNAL
surface_treatmentANODIZE OVERALL
nominal_thread_size0.312 INCHES EXTERNAL IN
end_item_identification09F AIRCRAFT, DELTA DART F-106; MRAP BUFFALO MK2A2
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) EXTERNAL
NSN4730-00-540-2231
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21913D2 · 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
•
HEAD HEIGHT: 0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: FLARELESS
•
STYLE DESIGNATOR: PLUG, TUBE FITTING FLARELESS (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND EXTERNAL
•
NOMINAL THREAD SIZE: 0.312 INCHES EXTERNAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEFLARELESS
STYLE DESIGNATORPLUG, TUBE FITTING FLARELESS (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND EXTERNAL
NOMINAL THREAD SIZE0.312 INCHES EXTERNAL IN
SEAT ANGLE6.0 DEGREES
SPECIFICATION/STANDARD DATA81343-AS21913 GOVERNMENT STANDARD
SUBSTITUTES & CROSS-REFERENCES 7
AS21913Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS21913W2Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS18280BReference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
AS21913D2Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS21913D2?
MS21913D2 is a PLUG,TUBE FITTING,THREADED.
What parts can replace MS21913D2?
There are 7 known substitutes for MS21913D2: AS21913, MS21913W2, AS18280 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21913D2?
MS21913D2 is cataloged in the U.S. Government catalog under NSN 4730-00-540-2231. 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.