PartsTable
Technical Data Sheet
Download PDF

Q374 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · IT_GENERAL · SOFTWARE
PRODUCT OVERVIEW

Q374: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2014 OVERALL, nut_style: TUBE FITTING LOCKNUT, nut_height: 0.281 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-277-6371, 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
IT_GENERAL→ SOFTWARE→ Q374
NSN: 4730-00-277-6371
NIINs: 002776371, 015695327
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 14170 — HUGHES MISSILE SYSTEMS CO SAN DIEGO (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2014 OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.281 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
width_across_flats0.688 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
packing_recess_depth0.042 INCHES NOMINAL IN
document_identificationTYPE 1 AND DES ENCYRPTION US SOVERIIGN AND CLASSIFIED (RESTRICTED)
end_item_identificationAN/TPN-31A, GROUND CONTROL APPROACH SYSTEM A
NSN4730-00-277-6371
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: Q374 · 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
•
WIDTH ACROSS FLATS: 0.688 INCHES NOMINAL IN
•
PACKING RECESS DIAMETER: 0.608 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/4,ALLOY 2014,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
SPECIFICATION/STANDARD DATA: 88044-AN6289 GOVERNMENT STANDARD
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.688 INCHES NOMINAL IN
PACKING RECESS DIAMETER0.608 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/4,ALLOY 2014,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
SPECIFICATION/STANDARD DATA88044-AN6289 GOVERNMENT STANDARD
NUT HEIGHT0.281 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
SUBSTITUTES & CROSS-REFERENCES 8
AN6289D4Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS5179D04Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4730PL0735267Reference document
Same NSN cross-reference
Reference document — Informative reference only
AN6289-4DSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5857-0403Reference document
Same NSN cross-reference
Reference document — Secondary reference
477 676Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
Ready to buy Q374?
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 Q374?
Q374 is a ADAPTER,STRAIGHT,TUBE TO BOSS. It is classified as a IT_GENERAL (SOFTWARE).
What parts can replace Q374?
There are 8 known substitutes for Q374: AN6289D4, AS5179D04, 4730PL0735267 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for Q374?
Q374 is cataloged in the U.S. Government catalog under NSN 4730-00-277-6371. 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 — Q374

✓ 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.