PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1-271770Seat,valve

Neac Compressor Service Usa Inc · NSN 4820-00-449-4149 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-449-4149 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-449-4149. Primary manufacturer part number: 1-271770.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: FLAT
  • Material: STEEL OVERALL
  • Flange Diameter: 5.800 INCHES NOMINAL IN
  • 4 verified cross-references
  • Primary manufacturer: Neac Compressor Service Usa Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-449-4149, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Neac Compressor Service Usa Inc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-449-4149
Primary Part Number1-271770
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNeac Compressor Service Usa Inc
StatusCANCELLED
Seating Surface ShapeFLAT
MaterialSTEEL OVERALL
Flange Diameter5.800 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
2920-00-358-76091271770 INTERCHANGEABLE
Ring
Chrysler Realty Company Llc Dba Daimler Chrysler
Cross-Reference Index
Part NumberManufacturer
1-271770 PRIMARY Neac Compressor Service Usa Inc (USA)
2-271770 Chicago Pneumatic Tool Co (USA)
1-271770 Chicago Pneumatic Tool Co (USA)
1-271770 Chicago Pneumatic Tool Co (USA)
Related Parts
2920-00-358-7609INTERCHANGEABLE
RING
1271770

Frequently Asked Questions

What is NSN 4820-00-449-4149?

NSN 4820-00-449-4149 is a Seat,valve, manufactured by Neac Compressor Service Usa Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-449-4149?

NSN 4820-00-449-4149 has 4 cross-referenced part numbers: 1-271770 (Neac Compressor Service Usa Inc), 2-271770 (Chicago Pneumatic Tool Co), 1-271770 (Chicago Pneumatic Tool Co), 1-271770 (Chicago Pneumatic Tool Co).

What NSN replaces 4820-00-449-4149?

There is 1 known substitute for 4820-00-449-4149: 2920-00-358-7609. Verify interchangeability with system specifications before substitution.

What are the specifications of 1-271770?

Key specifications for 1-271770: Overall Height: 0.819 INCHES NOMINAL IN; Seating Surface Shape: FLAT; Material: STEEL OVERALL; Flange Diameter: 5.800 INCHES NOMINAL IN. 4 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-449-4149 still in active supply?

NSN 4820-00-449-4149 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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