The Valve,check, cataloged under National Stock Number 4820-01-499-8665, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Haywardindl. Products, Inc.. Government technical data includes 5 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-499-8665 |
| Primary Part Number | TC10100ST |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Haywardindl. Products, Inc. |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Valve Size | 3.000 INCHES IN |
| Face to Face Distance | 7.750 INCHES IN |
| Material | PLASTIC POLYVINYL CHLORIDE (PVC) OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| TC10100ST PRIMARY | Haywardindl. Products, Inc. (USA) |
NSN 4820-01-499-8665 is a Valve,check, manufactured by Haywardindl. Products, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-499-8665 has 1 manufacturer part number on file: TC10100ST (Haywardindl. Products, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-646-5183. Verify interchangeability with system specifications before substitution.
Key specifications for TC10100ST: Flow Control Device: BALL; Style Designator: STRAIGHT THRU FLANGED ENDS; Valve Size: 3.000 INCHES IN; Special Features: 150.0 PSI AT 70 DEGREES F,NON-STOCK;1.250 POUNDS;CONSISTS OF BODY, O-RING;SEALS, SQUARE CUT O-RING SEAT;SEAL RETAINER;END CONNECTOR;UNION NUT LBS. 5 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.
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.