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490-142 — SHIELD,ELECTRON TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

490-142: SHIELD,ELECTRON TUBE.

The SHIELD,ELECTRON TUBE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1137 OVERALL, nut_style: PLATE, nut_height: 0.368 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN, nut_length: 1.286 INCHES MINIMUM AND 2.296 INCHES MAXIMUM IN, plate_width: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN, thread_class: 3B. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-193-2711, 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
490-142
NSN: 4730-00-193-2711
NIINs: 001932711, 002620011, 009410161
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 72741 — DORMAN PRODUCTS, INC. DBA DORMAN (USA)
SPECIFICATIONS
materialSTEEL COMP 1137 OVERALL
nut_stylePLATE
nut_height0.368 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN
nut_length1.286 INCHES MINIMUM AND 2.296 INCHES MAXIMUM IN
plate_width0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
overall_length2.188 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
hardness_rating24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.055 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
NSN4730-00-193-2711
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 490-142 · 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 (PIPE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.500 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: SHORT
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B43 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
•
SPECIFICATION/STANDARD DATA: 81346-ASTM B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51846 GOVERNMENT STANDARD
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
NOMINAL OVERALL LENGTH1.500 INCHES IN
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
STYLE DESIGNATORSHORT
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B43 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA81346-ASTM B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51846 GOVERNMENT STANDARD
SPECIAL FEATURESSHORT PIPE WRENCHING FACILITY
MATERIALCOPPER ALLOY OVERALL
THREAD SERIES DESIGNATORNPT ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 4
WWN351Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS51846-42Reference document
Same NSN cross-reference
Reference document — Secondary reference
ASTM-B687Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
ASTMB687R-42BReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 490-142?
490-142 is a SHIELD,ELECTRON TUBE.
What parts can replace 490-142?
There are 4 known substitutes for 490-142: WWN351, MS51846-42, ASTM-B687 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 490-142?
490-142 is cataloged in the U.S. Government catalog under NSN 4730-00-193-2711. This indicates validated use in U.S. government and defense supply chains.
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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.