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1961-BD4 — FITTING,LUBRICATION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1961-BD4: FITTING,LUBRICATION.

The FITTING,LUBRICATION is a the manufacturer industrial component. Key specifications include overall_width: 3.125 INCHES NOMINAL IN, indicator_type: DIAL W/POINTER, overall_height: 1.313 INCHES NOMINAL IN, overall_length: 3.750 INCHES NOMINAL IN, unable_to_decode: UNABLE TO DECODE, end_item_identification: MRAP - UNIQUE NSN - MRAP NO PERMANENT WSDC IDENTIFIED. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-643-0595, 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
1961-BD4
NSN: 4730-01-643-0595
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
overall_width3.125 INCHES NOMINAL IN
indicator_typeDIAL W/POINTER
overall_height1.313 INCHES NOMINAL IN
overall_length3.750 INCHES NOMINAL IN
unable_to_decodeUNABLE TO DECODE
end_item_identificationMRAP - UNIQUE NSN - MRAP NO PERMANENT WSDC IDENTIFIED
scale_division_quantity30 SINGLE INDICATOR SINGLE RANGE
circuit_current_for_which_designedDC
NSN4730-01-643-0595
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1961-BD4 · 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
SUBSTITUTES & CROSS-REFERENCES 7
20809009 REV H ITEM 23Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
26M01-5711-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
26M01-5711-6D4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
803-7550727-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
803-7550727-6D4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1961-BSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1961-BD4?
1961-BD4 is a FITTING,LUBRICATION.
What parts can replace 1961-BD4?
There are 7 known substitutes for 1961-BD4: 20809009 REV H ITEM 23, 26M01-5711-6, 26M01-5711-6D4 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1961-BD4?
1961-BD4 is cataloged in the U.S. Government catalog under NSN 4730-01-643-0595. 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.