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4BU316 — NIPPLE,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4BU316: NIPPLE,TUBE.

The NIPPLE,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, seat_angle: 20.0 DEGREES ALL ENDS, thread_class: 3A FIRST END BULKHEAD A, connection_style: FLARELESS (TUBE) ALL ENDS, style_designator: FLARELESS W/ OFFSET WRENCHING FACILITY, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-061-6932, 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
4BU316
NSN: 4730-00-061-6932
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 01355 — J R DOUGLASS COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
seat_angle20.0 DEGREES ALL ENDS
thread_class3A FIRST END BULKHEAD A
connection_styleFLARELESS (TUBE) ALL ENDS
style_designatorFLARELESS W/ OFFSET WRENCHING FACILITY
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.438 INCHES ALL ENDS IN
nominal_overall_length1.690 INCHES IN
end_item_identificationLIGHTWEIGHT WATER PURIFIER 4610-01-495-0046
thread_series_designatorUNF ALL ENDS
furnished_items_and_quantity1 LOCKNUT AND 2 TUBE COUPLING NUT W/SLEEVE
nominal_outside_diameter_tube_accommodated0.250 INCHES ALL ENDS IN
NSN4730-00-061-6932
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4BU316 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 LOCKNUT AND 2 TUBE COUPLING NUT W/SLEEVE
•
CONNECTION STYLE: FLARELESS (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.690 INCHES IN
•
STYLE DESIGNATOR: FLARELESS W/ OFFSET WRENCHING FACILITY
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.438 INCHES FIRST END BULKHEAD IN
•
SEAT ANGLE: 20.0 DEGREES ALL ENDS
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 LOCKNUT AND 2 TUBE COUPLING NUT W/SLEEVE
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH1.690 INCHES IN
STYLE DESIGNATORFLARELESS W/ OFFSET WRENCHING FACILITY
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.438 INCHES FIRST END BULKHEAD IN
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
SEAT ANGLE20.0 DEGREES ALL ENDS
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3A FIRST END BULKHEAD A
SUBSTITUTES & CROSS-REFERENCES 8
CV0166-007Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
I4-4BU-SSReference document
Same NSN cross-reference
Reference document — Secondary reference
SS-400-61Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
782FSS1-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
5335988Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
SS-40-61Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4BU316?
4BU316 is a NIPPLE,TUBE.
What parts can replace 4BU316?
There are 8 known substitutes for 4BU316: CV0166-007, I4-4BU-SS, SS-400-61 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4BU316?
4BU316 is cataloged in the U.S. Government catalog under NSN 4730-00-061-6932. 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.