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PartsTable / COMPONENT / MS21953-4H
MS21953-4H ✓ 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

CONNECTOR,MULTIPLE,FLUID PRESSUR. Key specifications include material: ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2014, thickness: 1.182 INCHES MINIMUM AND 1.192 INCHES MAXIMUM IN, thread_size: 7/16 IN. -20 LOCATION NOT OTHERWISE SPECIFIED IN, thread_class: 3A LOCATION NOT OTHERWISE SPECIFIED A, overall_width: 1.620 INCHES MINIMUM AND 1.792 INCHES MAXIMUM IN, overall_length: 2.248 INCHES MINIMUM AND 2.332 INCHES MAXIMUM IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-288-8151, 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
MS21953-4H
NSN: 4730-00-288-8151
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2014
thickness1.182 INCHES MINIMUM AND 1.192 INCHES MAXIMUM IN
thread_size7/16 IN. -20 LOCATION NOT OTHERWISE SPECIFIED IN
thread_class3A LOCATION NOT OTHERWISE SPECIFIED A
overall_width1.620 INCHES MINIMUM AND 1.792 INCHES MAXIMUM IN
overall_length2.248 INCHES MINIMUM AND 2.332 INCHES MAXIMUM IN
furnished_itemsSEAT LOCATION NOT OTHERWISE SPECIFIED
connection_styleFLARED LOCATION NOT OTHERWISE SPECIFIED
style_designator1 FLUID CONNECTION
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
seat_angle_in_deg37.0 LOCATION NOT OTHERWISE SPECIFIED
NSN4730-00-288-8151
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21953-4H · 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
•
FLUID CONNECTION QUANTITY: 1 LOCATION NOT OTHERWISE SPECIFIED
•
MATERIAL: ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2014
•
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED: 1/4 IN. OD TUBE IN
•
STYLE DESIGNATOR: 1 FLUID CONNECTION
•
FURNISHED ITEMS: SEAT LOCATION NOT OTHERWISE SPECIFIED
•
THICKNESS: 1.182 INCHES MINIMUM AND 1.192 INCHES MAXIMUM IN
•
CONNECTION STYLE: FLARED LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS (FLIS)
FLUID CONNECTION QUANTITY1 LOCATION NOT OTHERWISE SPECIFIED
MATERIALALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2014
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED1/4 IN. OD TUBE IN
OVERALL LENGTH2.248 INCHES MINIMUM AND 2.332 INCHES MAXIMUM IN
STYLE DESIGNATOR1 FLUID CONNECTION
FURNISHED ITEMSSEAT LOCATION NOT OTHERWISE SPECIFIED
THICKNESS1.182 INCHES MINIMUM AND 1.192 INCHES MAXIMUM IN
CONNECTION STYLEFLARED LOCATION NOT OTHERWISE SPECIFIED
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
BOLT HOLE DIAMETER0.812 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
6210001764955Interchangeable
interchangeable cross-reference
interchangeable
LC35GT2Interchangeable
interchangeable cross-reference
interchangeable
352250013917Interchangeable
interchangeable cross-reference
interchangeable
105-01464Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21953-4H?
MS21953-4H is a CONNECTOR,MULTIPLE,FLUID PRESSUR.
What parts can replace MS21953-4H?
There are 4 known substitutes for MS21953-4H: 6210001764955, LC35GT2, 352250013917 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21953-4H?
MS21953-4H is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-288-8151. 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