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2U316 — NIPPLE,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2U316: NIPPLE,TUBE.

The NIPPLE,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, leg_length: 0.344 INCHES MINIMUM ALL ENDS IN, seat_angle: 20.0 DEGREES ALL ENDS, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: FLARELESS (TUBE) ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-652-4633, 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
2U316
NSN: 4730-00-652-4633
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 28968 — CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. DBA HOKE GYROLOK (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
leg_length0.344 INCHES MINIMUM ALL ENDS IN
seat_angle20.0 DEGREES ALL ENDS
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARELESS (TUBE) ALL ENDS
style_designatorFLARELESS W/ CENTER WRENCHING FACILITY
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.312 INCHES ALL ENDS IN
nominal_overall_length0.875 INCHES IN
end_item_identificationSHIP, OHIO CLASS SSN (TRIDENT)
media_for_which_designedFLUID SINGLE RESPONSE
NSN4730-00-652-4633
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2U316 · 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: 2 SHORT COUPLING NUT AND 4 FERRULE SLEEVE
•
CONNECTION STYLE: FLARELESS (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 0.875 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: FLARELESS W/ CENTER WRENCHING FACILITY
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.125 INCHES ALL ENDS IN
•
LEG LENGTH: 0.344 INCHES MINIMUM ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.312 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY2 SHORT COUPLING NUT AND 4 FERRULE SLEEVE
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH0.875 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
STYLE DESIGNATORFLARELESS W/ CENTER WRENCHING FACILITY
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.125 INCHES ALL ENDS IN
LEG LENGTH0.344 INCHES MINIMUM ALL ENDS IN
NOMINAL THREAD SIZE0.312 INCHES ALL ENDS IN
SEAT ANGLE20.0 DEGREES ALL ENDS
SURFACE TREATMENTPASSIVATE OVERALL
SUBSTITUTES & CROSS-REFERENCES 5
3666-3-29Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1034-B320-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
D5160-545-01 ITReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
2-2 HBZ-SSSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
200-6-316Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2U316?
2U316 is a NIPPLE,TUBE.
What parts can replace 2U316?
There are 5 known substitutes for 2U316: 3666-3-29, 1034-B320-4, D5160-545-01 IT and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2U316?
2U316 is cataloged in the U.S. Government catalog under NSN 4730-00-652-4633. 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.