The Valve,gate, cataloged under National Stock Number 4820-01-425-4242, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-425-4242 |
| Primary Part Number | D20305S1 |
| Item Name | Valve,gate |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 BY-PASS |
| Criticality Code Justification | ZZZY |
| Connection Type | BUTT WELD PIPE |
| Material Document and Classification | ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM A1823 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | ASTM A217 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A217 ASSN STD SINGLE MATERIAL RESPONSE DISK |
| Valve Size | 12.000 INCHES IN |
| Material | STEEL BODY |
| Material | STEEL DISK |
| Material | STEEL SEAT |
| Material | STEEL COMP 410 STEM |
| Reference Number Differentiating Characteristics | QUALITY CONTROLLED IN ACCORDANCE WITH NAVSUP CONTROL INSTRUCTIONS FOR SURF LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| D20305S1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| D20305 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-01-425-4242 is a Valve,gate, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-4242 has 1 manufacturer part number on file: D20305S1 (Naval Inventory Control Point Mechanicsburg).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-428-4454, 4810-01-428-4455, 4810-01-428-6425. Verify interchangeability with system specifications before substitution.
Key specifications for D20305S1: Furnished Items and Quantity: 1 BY-PASS; Criticality Code Justification: ZZZY; Connection Type: BUTT WELD PIPE; Material Document and Classification: ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE STEM. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4820-01-425-4242 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.