PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55B3Dampener,fluid Pressure

Operating & Maintenance Specialties Inc · NSN 6685-00-316-2601 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-316-2601 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-316-2601. Primary manufacturer part number: 55B3.
Features
  • Dampener,fluid Pressure — FSC 6685
  • Tube Connection Type: FLARELESS
  • Removable Piston: PROVIDED
  • Material: COPPER ALLOY
  • Threaded Direct Pressure Connection: PROVIDED
  • Thread Location: EXTERNAL AND INTERNAL
  • Piston Size Designation: 3
  • Operating Pressure Range: +0.0 TO 15000.0 POUNDS PER SQUARE INCH LBS
Applications
  • Applications requiring Copper Alloy construction
General Description

The Dampener,fluid Pressure, cataloged under National Stock Number 6685-00-316-2601, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Operating & Maintenance Specialties Inc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN6685-00-316-2601
Primary Part Number55B3
Item NameDampener,fluid Pressure
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerOperating & Maintenance Specialties Inc
StatusACTIVE
Tube Connection TypeFLARELESS
Removable PistonPROVIDED
MaterialCOPPER ALLOY
Threaded Direct Pressure ConnectionPROVIDED
Thread LocationEXTERNAL AND INTERNAL
Piston Size Designation3
Operating Pressure Range+0.0 TO 15000.0 POUNDS PER SQUARE INCH LBS
Nominal Pipe Size Designation0.250 INCHES IN
Connection Quantity2
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
1660-00-464-357255B3 INTERCHANGEABLE
Sensor,temperature
Horizon Aerospace Llc Dba Magnetics Division
4930-01-274-167855B3 INTERCHANGEABLE
Separator,oil
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
Cross-Reference Index
Part NumberManufacturer
55B3 PRIMARY Operating & Maintenance Specialties Inc (USA)
AH188 Tropic-Aire Carrier Division of Mc Graw-Edison Co (USA)
Related Parts
1660-00-464-3572INTERCHANGEABLE
SENSOR,TEMPERATURE
55B3
4930-01-274-1678INTERCHANGEABLE
SEPARATOR,OIL
55B3

Frequently Asked Questions

What is NSN 6685-00-316-2601?

NSN 6685-00-316-2601 is a Dampener,fluid Pressure, manufactured by Operating & Maintenance Specialties Inc, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-316-2601?

NSN 6685-00-316-2601 has 2 cross-referenced part numbers: 55B3 (Operating & Maintenance Specialties Inc), AH188 (Tropic-Aire Carrier Division of Mc Graw-Edison Co).

What NSN replaces 6685-00-316-2601?

There are 2 known substitutes for 6685-00-316-2601: 1660-00-464-3572, 4930-01-274-1678. Verify interchangeability with system specifications before substitution.

What are the specifications of 55B3?

Key specifications for 55B3: Tube Connection Type: FLARELESS; Removable Piston: PROVIDED; Overall Length: 1.850 INCHES NOMINAL IN; Material: COPPER ALLOY. 11 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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