NSN 4820-01-641-5993 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-641-5993. Manufacturer of record part number: LF215.
Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE SEAT
Valve Size: 4.5 INCHES IN
Material: STEEL CORROSION RESISTING SEAT
Maximum Inlet Pressure Rating: ERR-060
2 manufacturer part numbers on file
Manufacturer of record: Watts Regulator Company
Identification
NSN: 4820-01-641-5993
NIIN: 016415993
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: LF215
Manufacturer: Watts Regulator Company
General Description
The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-641-5993, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-641-5993
Primary Part Number
LF215
Item Name
Valve,regulating,fluid Pressure
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Watts Regulator Company
Status
ACTIVE
Temp Rating
120.0 FAHRENHEIT MAXIMUM DEGF
Material Document and Classification
QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE SEAT
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 4820-01-641-5993?
NSN 4820-01-641-5993 is a Valve,regulating,fluid Pressure, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-641-5993?
NSN 4820-01-641-5993 has 2 manufacturer part numbers on file: LF215 (Watts Regulator Company), 3878T41 (Mcmaster-Carr Supply Company).
What are the specifications of LF215?
Key specifications for LF215: Temp Rating: 120.0 FAHRENHEIT MAXIMUM DEGF; Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE SEAT; Valve Size: 4.5 INCHES IN; Part Name Assigned by Controlling Agency: LOW PRESSURE REGULATOR. 5 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-641-5993 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.