NSN 4820-01-645-1658 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-645-1658. Manufacturer of record part number: B-6C-1/3.
Also searched as4820-01-645-1658 ·
4820016451658 ·
NIIN 016451658 ·
01-645-1658 ·
FSC 4820 Valves, Nonpowered · CAGE 3T9T9 · B-6C-1/3
Nearby stock numbers← 4820-01-645-1657 Parts Kit, Pressure Regulating VA
·
4820-01-645-1659 Valve, Check →
4820-01-645-1658 — Valves, Nonpowered
Features
Valve,check — FSC 4820
Flow Control Device: POPPET
Style Designator: STRAIGHT THRU
Operating Pressure: 2200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Valve Size: 0.375 INCHES IN
Maximum Operating Temp: 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
Material: COPPER ALLOY OVERALL
Valve Operation Method: MANUAL
Identification
NSN: 4820-01-645-1658
NIIN: 016451658
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: B-6C-1/3
Manufacturer: Swagelok Co
General Description
The Valve,check, cataloged under National Stock Number 4820-01-645-1658, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. Government technical data includes 7 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-645-1658
Primary Part Number
B-6C-1/3
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Swagelok Co
Status
ACTIVE
Flow Control Device
POPPET
Style Designator
STRAIGHT THRU
Operating Pressure
2200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-645-1658?
NSN 4820-01-645-1658 is a Valve,check, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-645-1658?
NSN 4820-01-645-1658 has 1 manufacturer part number on file: B-6C-1/3 (Swagelok Co).
What are the specifications of B-6C-1/3?
Key specifications for B-6C-1/3: Flow Control Device: POPPET; Style Designator: STRAIGHT THRU; Operating Pressure: 2200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Size: 0.375 INCHES IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-645-1658 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.