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Technical Data Sheet
PartsTable / COMPONENT / M2051BW
M2051BW ✓ 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 PLUG,PIPE is a the manufacturer industrial component. Key specifications include length: 0.500 INCHES NOMINAL IN, material: STEEL OVERALL, end_radius: 0.344 INCHES NOMINAL IN, fork_depth: 1.625 INCHES NOMINAL IN, head_angle: 15.0 DEGREES NOMINAL, insert_size: 0.500-13 UNC CLASS 3A A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-057-5089, 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
M2051BW
NSN: 4730-01-057-5089
FSC: 4730
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
length0.500 INCHES NOMINAL IN
materialSTEEL OVERALL
end_radius0.344 INCHES NOMINAL IN
fork_depth1.625 INCHES NOMINAL IN
head_angle15.0 DEGREES NOMINAL
insert_size0.500-13 UNC CLASS 3A A
gaging_range+0.200 TO 18.200 INCHES IN
thread_class3B
hole_diameter0.374 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
overall_width0.875 INCHES NOMINAL IN
thread_length0.875 INCHES NOMINAL ROD CONNECTION IN
indicator_typeDIGITAL READOUT
NSN4730-01-057-5089
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M2051BW · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
258Interchangeable
interchangeable cross-reference
interchangeable
DHG18.258Interchangeable
interchangeable cross-reference
interchangeable
599-585-18-1Interchangeable
interchangeable cross-reference
interchangeable
220604PC4Interchangeable
interchangeable cross-reference
interchangeable
25818Interchangeable
interchangeable cross-reference
interchangeable
B25818Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M2051BW?
M2051BW is a PLUG,PIPE.
What parts can replace M2051BW?
There are 16 known substitutes for M2051BW: 258, DHG18.258, 599-585-18-1 and 13 more. Substitute compatibility should be verified for your specific system.
Is M2051BW still available?
M2051BW is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026