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FV31-991-1 — BLOCK,ADJUSTING SCREW

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

FV31-991-1: BLOCK,ADJUSTING SCREW.

The BLOCK,ADJUSTING SCREW is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: BRASS ASTM B16. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-278-9903, 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
FV31-991-1
NSN: 4820-01-278-9903
FSC: 4820 — Valves, Nonpowered
CAGE: 04845 — AUTOMATIC SWITCH COMPANY DBA ASCO (USA)
SPECIFICATIONS
general_characteristics_item_descriptionBRASS ASTM B16
NSN4820-01-278-9903
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: FV31-991-1 · 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
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: BRASS ASTM B16
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONBRASS ASTM B16
SUBSTITUTES & CROSS-REFERENCES 2
AV202-55 ITEM 36Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AV202-055Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 FV31-991-1?
FV31-991-1 is a BLOCK,ADJUSTING SCREW.
What parts can replace FV31-991-1?
There are 2 known substitutes for FV31-991-1: AV202-55 ITEM 36, AV202-055. Substitute compatibility should be verified for your specific system.
What is the NSN for FV31-991-1?
FV31-991-1 is cataloged in the U.S. Government catalog under NSN 4820-01-278-9903. 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.