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H1940G-540 — ARRESTER,WELDING FLASHBACK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

H1940G-540: ARRESTER,WELDING FLASHBACK.

The ARRESTER,WELDING FLASHBACK is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: INLET PRESSURE GAGE 2.000 IN. W/4000 LB SCALE,OUTLET PRESSURE GAGE 2.000 IN.

W/30 LB SCALE LBS. This part is cataloged in the U.S. Government catalog under NSN 4820-00-418-0099, 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
H1940G-540
NSN: 4820-00-418-0099
FSC: 4820 — Valves, Nonpowered
CAGE: 55681 — SMITH EQUIPMENT MFG CO LLC (USA)
SPECIFICATIONS
general_characteristics_item_descriptionINLET PRESSURE GAGE 2.000 IN. W/4000 LB SCALE,OUTLET PRESSURE GAGE 2.000 IN. W/30 LB SCALE LBS
NSN4820-00-418-0099
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: H1940G-540 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: INLET PRESSURE GAGE 2.000 IN. W/4000 LB SCALE,OUTLET PRESSURE GAGE 2.000 IN. W/30 LB SCALE LBS
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONINLET PRESSURE GAGE 2.000 IN. W/4000 LB SCALE,OUTLET PRESSURE GAGE 2.000 IN. W/30 LB SCALE LBS
SUBSTITUTES & CROSS-REFERENCES 7
H743Reference document
Same NSN cross-reference
Reference document — Secondary reference
H1940C-540Reference document
Same NSN cross-reference
Reference document — Secondary reference
H1940-540Reference document
Same NSN cross-reference
Reference document — Secondary reference
H1940A-540Reference document
Same NSN cross-reference
Reference document — Secondary reference
H1740-540Reference document
Same NSN cross-reference
Reference document — Secondary reference
H1940D-540Reference 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 H1940G-540?
H1940G-540 is a ARRESTER,WELDING FLASHBACK.
What parts can replace H1940G-540?
There are 7 known substitutes for H1940G-540: H743, H1940C-540, H1940-540 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H1940G-540?
H1940G-540 is cataloged in the U.S. Government catalog under NSN 4820-00-418-0099. 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.