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MS51873-111B — NIPPLE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS51873-111B: NIPPLE,PIPE.

The NIPPLE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: LONG, surface_treatment: OXIDE OVERALL, nominal_thread_size: 0.750 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-169-8658, 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
MS51873-111B
NSN: 4730-01-169-8658
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
materialSTEEL OVERALL
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorLONG
surface_treatmentOXIDE OVERALL
nominal_thread_size0.750 INCHES ALL ENDS IN
nominal_overall_length8.000 INCHES IN
end_item_identificationCRYOGENICS
thread_series_designatorNPT ALL ENDS
specification/standard_data96906-MS51873 GOVERNMENT STANDARD
pipe_wall_thickness_designation_for_which_designedSCHEDULE 80S ALL ENDS
NSN4730-01-169-8658
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51873-111B · 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
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 8.000 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: LONG
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
•
SPECIFICATION/STANDARD DATA: 96906-MS51873 GOVERNMENT STANDARD
•
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNED: SCHEDULE 80S ALL ENDS
•
SURFACE TREATMENT: OXIDE OVERALL
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
NOMINAL OVERALL LENGTH8.000 INCHES IN
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
STYLE DESIGNATORLONG
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA96906-MS51873 GOVERNMENT STANDARD
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNEDSCHEDULE 80S ALL ENDS
SURFACE TREATMENTOXIDE OVERALL
END ITEM IDENTIFICATIONCRYOGENICS
MATERIALSTEEL OVERALL
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
W138326P15Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51873-111B?
MS51873-111B is a NIPPLE,PIPE.
What parts can replace MS51873-111B?
There is 1 known substitute for MS51873-111B: W138326P15. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51873-111B?
MS51873-111B is cataloged in the U.S. Government catalog under NSN 4730-01-169-8658. 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.