PartsTable
Technical Data Sheet
Download PDF

121B374 — CAP,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

121B374: CAP,TUBE.

The CAP,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, thread_class: 3B INTERNAL, connection_style: PLAIN (OPTIONAL END), style_designator: CAP, thread_direction: RIGHT-HAND INTERNAL, nominal_thread_size: 1.312 INCHES INTERNAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-083-3031, 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
121B374
NSN: 4730-01-083-3031
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 97942 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
thread_class3B INTERNAL
connection_stylePLAIN (OPTIONAL END)
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
nominal_thread_size1.312 INCHES INTERNAL IN
thread_quantity_per_inch18 INTERNAL
thread_series_designatorUNS INTERNAL
material_document_and_classificationQQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
tube_outside_diameter_for_which_designed1.340 INCHES MINIMUM AND 1.345 INCHES MAXIMUM IN
NSN4730-01-083-3031
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 121B374 · 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 (OPTIONAL END)
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.340 INCHES MINIMUM AND 1.345 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CAP
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND INTERNAL
•
NOMINAL THREAD SIZE: 1.312 INCHES INTERNAL IN
•
THREAD CLASS: 3B INTERNAL
•
THREAD QUANTITY PER INCH: 18 INTERNAL
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (OPTIONAL END)
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.340 INCHES MINIMUM AND 1.345 INCHES MAXIMUM IN
STYLE DESIGNATORCAP
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND INTERNAL
NOMINAL THREAD SIZE1.312 INCHES INTERNAL IN
THREAD CLASS3B INTERNAL
THREAD QUANTITY PER INCH18 INTERNAL
MATERIALALUMINUM ALLOY OVERALL
THREAD SERIES DESIGNATORUNS INTERNAL
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
121B374H01Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 121B374?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 121B374?
121B374 is a CAP,TUBE.
What parts can replace 121B374?
There is 1 known substitute for 121B374: 121B374H01. Substitute compatibility should be verified for your specific system.
What is the NSN for 121B374?
121B374 is cataloged in the U.S. Government catalog under NSN 4730-01-083-3031. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 121B374