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78FM1995 — COUPLING,BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

78FM1995: COUPLING,BOSS.

The COUPLING,BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, thread_class: 3A SECOND END A, connection_type: THREADED INTERNAL BOSS FIRST END, connection_style: GASKET SEAL (BOSS) FIRST END, style_designator: RIGID W/OFFSET WRENCHING FACILITY, surface_treatment: ANODIZE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-540-0672, 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
78FM1995
NSN: 4730-00-540-0672
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
thread_class3A SECOND END A
connection_typeTHREADED INTERNAL BOSS FIRST END
connection_styleGASKET SEAL (BOSS) FIRST END
style_designatorRIGID W/OFFSET WRENCHING FACILITY
surface_treatmentANODIZE OVERALL
nominal_thread_size0.438 INCHES FIRST END IN
nominal_overall_length1.187 INCHES IN
thread_series_designatorUNF SECOND END
material_document_and_classificationQQ-A-354,CL 24 STT4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
reduced_passage_nominal_inside_diameter0.021 INCHES SECOND END IN
NSN4730-00-540-0672
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 78FM1995 · 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: FLARED W/ GASKET SEAL (BOSS) SECOND END
•
NOMINAL OVERALL LENGTH: 1.187 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL BOSS FIRST END
•
STYLE DESIGNATOR: RIGID W/OFFSET WRENCHING FACILITY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-354,CL 24 STT4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
REDUCED PASSAGE NOMINAL INSIDE DIAMETER: 0.021 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED W/ GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEGASKET SEAL (BOSS) FIRST END
NOMINAL OVERALL LENGTH1.187 INCHES IN
CONNECTION TYPETHREADED INTERNAL BOSS FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
STYLE DESIGNATORRIGID W/OFFSET WRENCHING FACILITY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-354,CL 24 STT4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
REDUCED PASSAGE NOMINAL INSIDE DIAMETER0.021 INCHES SECOND END IN
NOMINAL THREAD SIZE0.438 INCHES SECOND END IN
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
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
89FM1995-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 78FM1995?
78FM1995 is a COUPLING,BOSS.
What parts can replace 78FM1995?
There is 1 known substitute for 78FM1995: 89FM1995-5. Substitute compatibility should be verified for your specific system.
What is the NSN for 78FM1995?
78FM1995 is cataloged in the U.S. Government catalog under NSN 4730-00-540-0672. This indicates validated use in U.S. government and defense supply chains.
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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.