PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G5-49-1Diaphragm,gas Side

Newport Scientific, Inc. · NSN 4310-00-139-5423 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-00-139-5423 — this item is cataloged by the U.S. Government under National Stock Number 4310-00-139-5423. Primary manufacturer part number: G5-49-1.
Features
  • Diaphragm,gas Side — FSC 4310
  • General Characteristics Item Description: AMERICAN INSTRUMENT CO INC,PART NO. G5-49-1
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
  • 5 verified cross-references
  • Primary manufacturer: Newport Scientific, Inc.
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Diaphragm,gas Side, cataloged under National Stock Number 4310-00-139-5423, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Newport Scientific, Inc.. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4310-00-139-5423
Primary Part NumberG5-49-1
Item NameDiaphragm,gas Side
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerNewport Scientific, Inc.
StatusACTIVE
General Characteristics Item DescriptionAMERICAN INSTRUMENT CO INC,PART NO. G5-49-1
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
2805-00-561-9463 INTERCHANGEABLE
Guide,valve Stem
2805-00-691-589401803 INTERCHANGEABLE
Guide,valve Stem
Safeguard Powertech Systems
Cross-Reference Index
Part NumberManufacturer
G5-49-1 Newport Scientific, Inc. (USA)
G5-49-1CP Naval Inventory Control Point Mechanicsburg (USA)
G5-49CP Newport Scientific, Inc. (USA)
75054011903P Newport Scientific, Inc. (USA)
G5-49 Newport Scientific, Inc. (USA)
Related Parts
2805-00-561-9463INTERCHANGEABLE
GUIDE,VALVE STEM
2805-00-691-5894INTERCHANGEABLE
GUIDE,VALVE STEM
01803

Frequently Asked Questions

What is NSN 4310-00-139-5423?

NSN 4310-00-139-5423 is a Diaphragm,gas Side, manufactured by Newport Scientific, Inc., classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-00-139-5423?

NSN 4310-00-139-5423 has 5 cross-referenced part numbers: G5-49-1 (Newport Scientific, Inc.), G5-49-1CP (Naval Inventory Control Point Mechanicsburg), G5-49CP (Newport Scientific, Inc.), 75054011903P (Newport Scientific, Inc.), G5-49 (Newport Scientific, Inc.).

What NSN replaces 4310-00-139-5423?

There are 2 known substitutes for 4310-00-139-5423: 2805-00-561-9463, 2805-00-691-5894. Verify interchangeability with system specifications before substitution.

What are the specifications of G5-49-1?

Key specifications for G5-49-1: General Characteristics Item Description: AMERICAN INSTRUMENT CO INC,PART NO. G5-49-1; Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. 3 total characteristics are documented in the Federal Logistics Information System.

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