The Valve,check, cataloged under National Stock Number 4820-01-679-7687, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ta Chen International, Inc. Div Polytec Shutters. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-679-7687 |
| Primary Part Number | TC-CKF-1.50 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ta Chen International, Inc. Div Polytec Shutters |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Bolt Circle Nominal Diameter | 3.880 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | ASTM A351 GR.CF8M AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE BODY |
| Bolt Hole Nominal Diameter | 0.620 INCHES ALL ENDS IN |
| Valve Size | 1.500 INCHES IN |
| Nominal Outside Diameter | 5.000 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| Face to Face Distance | 6.500 INCHES IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE PACKING |
| Material | STEEL CORROSION RESISTING BODY |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.560 INCHES ALL ENDS IN |
| 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 |
|---|---|
| TC-CKF-1.50 PRIMARY | Ta Chen International, Inc. Div Polytec Shutters (USA) |
| Reference | Meaning |
|---|---|
| TC-CKF-ANSI 1 1/2IN | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-679-7687 is a Valve,check, manufactured by Ta Chen International, Inc. Div Polytec Shutters, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-679-7687 has 1 manufacturer part number on file: TC-CKF-1.50 (Ta Chen International, Inc. Div Polytec Shutters).
Key specifications for TC-CKF-1.50: Flange Shape: ROUND WITH HOLES ALL ENDS; Bolt Circle Nominal Diameter: 3.880 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS; Style Designator: STRAIGHT THRU FLANGED ENDS. 14 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.