PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25BBuffer,protective L

Ocean Products Research, Inc. Dba Ocean Products Research · NSN 4030-01-257-8489 · FSC 4030 · No Item Name Available
Verified by PartsTable
NSN 4030-01-257-8489 — this item is cataloged by the U.S. Government under National Stock Number 4030-01-257-8489. Primary manufacturer part number: 25B.
Features
  • Buffer,protective L — FSC 4030
  • 1 verified cross-reference
  • Primary manufacturer: Ocean Products Research, Inc. Dba Ocean Products Research
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Buffer,protective L, cataloged under National Stock Number 4030-01-257-8489, is classified within Federal Supply Class 4030 (No Item Name Available) of the Rope, Cable, Chain, and Fittings group. The primary manufacturer of record is Ocean Products Research, Inc. Dba Ocean Products Research. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBuffer,protective L
FSC / FSG4030 — No Item Name Available (FSG 40)
ManufacturersOcean Products Research, Inc. Dba Ocean Products Research (CAGE 27232)
Technical Specifications
ParameterValue
NSN4030-01-257-8489
Primary Part Number25B
Item NameBuffer,protective L
FSC / FSG4030 / 40 — No Item Name Available
ManufacturerOcean Products Research, Inc. Dba Ocean Products Research
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
6685-00-063-97221-4 1112BE INTERCHANGEABLE
Dampener,fluid Pressure
Ashcroft Inc Dba Heise
4310-00-173-527025B INTERCHANGEABLE
Ring,piston
Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
5940-00-237-8867 INTERCHANGEABLE
Terminal Board
6625-00-610-5791 INTERCHANGEABLE
Detecting Element,directional Co
6685-00-682-74591-4 1112BG INTERCHANGEABLE
Dampener,fluid Pressure
Ashcroft Inc Dba Heise
5130-01-237-2241 INTERCHANGEABLE
Cutter,hydraulic,portable
5340-01-307-21792.5-B INTERCHANGEABLE
Ferrule,grooved Clamp Coupling
Vernatherm Llc
6625-01-374-9122 INTERCHANGEABLE
Counter,electronic,digital Reado
6625-01-541-558925B INTERCHANGEABLE
Meter,electrical Frequency
Phase Matrix, Inc. Dba Ni Microwave Components
Cross-Reference Index
Part NumberManufacturer
25B PRIMARY Ocean Products Research, Inc. Dba Ocean Products Research (USA)
Related Parts
6685-00-063-9722INTERCHANGEABLE
DAMPENER,FLUID PRESSURE
1-4 1112BE
4310-00-173-5270INTERCHANGEABLE
RING,PISTON
25B
5940-00-237-8867INTERCHANGEABLE
TERMINAL BOARD
6625-00-610-5791INTERCHANGEABLE
DETECTING ELEMENT,DIRECTIONAL CO
6685-00-682-7459INTERCHANGEABLE
DAMPENER,FLUID PRESSURE
1-4 1112BG
5130-01-237-2241INTERCHANGEABLE
CUTTER,HYDRAULIC,PORTABLE
5340-01-307-2179INTERCHANGEABLE
FERRULE,GROOVED CLAMP COUPLING
2.5-B
6625-01-374-9122INTERCHANGEABLE
COUNTER,ELECTRONIC,DIGITAL READO
6625-01-541-5589INTERCHANGEABLE
METER,ELECTRICAL FREQUENCY
25B

Frequently Asked Questions

What is NSN 4030-01-257-8489?

NSN 4030-01-257-8489 is a Buffer,protective L, manufactured by Ocean Products Research, Inc. Dba Ocean Products Research, classified under FSC 4030 (No Item Name Available). Status: active.

What are the part numbers for NSN 4030-01-257-8489?

NSN 4030-01-257-8489 has 1 cross-referenced part number: 25B (Ocean Products Research, Inc. Dba Ocean Products Research).

What NSN replaces 4030-01-257-8489?

There are 9 known substitutes for 4030-01-257-8489: 6685-00-063-9722, 4310-00-173-5270, 5940-00-237-8867 and 6 more. Verify interchangeability with system specifications before substitution.

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