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PartsTable / COMPONENT / MV-21W5
MV-21W5 ✓ 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 FLANGE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL, special_features: ACME THREADS 4/1 LEFT,CLOCKWISE TO CLOSE,9 1/2 TURNS, attachment_method: BOLTS, stem_actuating_end_type: THREADED EXTERNALLY, largest_outside_diameter: 1.250 INCHES NOMINAL IN, nondefinitive_spec/std_data: 5 SIZE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-274-0455, 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
MV-21W5
NSN: 4730-01-274-0455
FSC: 4730
CAGE: 61661 — NEWMANS INC NEW JERSEY DIV (USA)
SPECIFICATIONS
materialSTEEL
special_featuresACME THREADS 4/1 LEFT,CLOCKWISE TO CLOSE,9 1/2 TURNS
attachment_methodBOLTS
stem_actuating_end_typeTHREADED EXTERNALLY
largest_outside_diameter1.250 INCHES NOMINAL IN
nondefinitive_spec/std_data5 SIZE
specification/standard_data81349-MIL-V-22052D/SH/ GOVERNMENT SPECIFICATION
valve_design_control_activity61661
valve_size_for_which_designed5.000 INCHES IN
valve_type_for_which_designedGLOBE
material_document_and_classificationASTM A276 GRADE 410 ASSN STD SINGLE MATERIAL RESPONSE
valve_model_number_for_which_designed21W-CB-3 W
NSN4730-01-274-0455
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MV-21W5 · 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
•
NONDEFINITIVE SPEC/STD DATA: 5 SIZE
•
SPECIFICATION/STANDARD DATA: 81349-MIL-V-22052D/SH/ GOVERNMENT SPECIFICATION
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA5 SIZE
SPECIFICATION/STANDARD DATA81349-MIL-V-22052D/SH/ GOVERNMENT SPECIFICATION
MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
MIL-DTL-22052Interchangeable
interchangeable cross-reference
interchangeable
MIL-V-22052DInterchangeable
interchangeable cross-reference
interchangeable
8347-2 1/2 IN.Interchangeable
interchangeable cross-reference
interchangeable
MILV22052Interchangeable
interchangeable cross-reference
interchangeable
C9877-7Interchangeable
interchangeable cross-reference
interchangeable
78306-B12-27PS2TS-SC40-882056343Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MV-21W5?
MV-21W5 is a FLANGE,PIPE.
What parts can replace MV-21W5?
There are 14 known substitutes for MV-21W5: MIL-DTL-22052, MIL-V-22052D, 8347-2 1/2 IN. and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MV-21W5?
MV-21W5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-274-0455. 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: July 2026