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1602AS181 — VALVE,VACUUM BREAKING

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1602AS181: VALVE,VACUUM BREAKING.

The VALVE,VACUUM BREAKING is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, furnished_items: CAP, special_features: CLEANED FOR OXYGEN USE, media_for_which_designed: OXYGEN, LIQUID OR NITROGEN, LIQUID, first_end_connection_type: THREADED INTERNAL TUBE, first_end_thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-425-1011, 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
1602AS181
NSN: 4820-01-425-1011
FSC: 4820 — Valves, Nonpowered
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
furnished_itemsCAP
special_featuresCLEANED FOR OXYGEN USE
media_for_which_designedOXYGEN, LIQUID OR NITROGEN, LIQUID
first_end_connection_typeTHREADED INTERNAL TUBE
first_end_thread_directionRIGHT-HAND
first_end_nominal_thread_size0.250 INCHES IN
first_end_thread_series_designatorUNF
NSN4820-01-425-1011
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1602AS181 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST END THREAD SERIES DESIGNATOR: UNF
•
FIRST END THREAD DIRECTION: RIGHT-HAND
•
FIRST END CONNECTION TYPE: THREADED INTERNAL TUBE
•
MATERIAL: STEEL CORROSION RESISTING BODY
•
MEDIA FOR WHICH DESIGNED: OXYGEN, LIQUID OR NITROGEN, LIQUID
•
FURNISHED ITEMS: CAP
•
FIRST END NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
FIRST END THREAD SERIES DESIGNATORUNF
FIRST END THREAD DIRECTIONRIGHT-HAND
FIRST END CONNECTION TYPETHREADED INTERNAL TUBE
SPECIAL FEATURESCLEANED FOR OXYGEN USE
MATERIALSTEEL CORROSION RESISTING BODY
MEDIA FOR WHICH DESIGNEDOXYGEN, LIQUID OR NITROGEN, LIQUID
FURNISHED ITEMSCAP
FIRST END NOMINAL THREAD SIZE0.250 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 1
1602AS181-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1602AS181?
1602AS181 is a VALVE,VACUUM BREAKING.
What parts can replace 1602AS181?
There is 1 known substitute for 1602AS181: 1602AS181-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 1602AS181?
1602AS181 is cataloged in the U.S. Government catalog under NSN 4820-01-425-1011. 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.