PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55SDampener,fluid Pressure

Operating & Maintenance Specialties Inc · NSN 6685-01-133-4304 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-133-4304 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-133-4304. Primary manufacturer part number: 55S.
Features
  • Dampener,fluid Pressure — FSC 6685
  • Thread Size: 7/16-20
  • Material: STEEL COMP 316
  • Material Document and Classification: AISI 316 ASSN STD SINGLE MATERIAL RESPONSE
  • 2 verified cross-references
  • Primary manufacturer: Operating & Maintenance Specialties Inc
Applications
  • Applications requiring Steel Comp 316 construction
General Description

The Dampener,fluid Pressure, cataloged under National Stock Number 6685-01-133-4304, 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 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN6685-01-133-4304
Primary Part Number55S
Item NameDampener,fluid Pressure
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerOperating & Maintenance Specialties Inc
StatusACTIVE
Thread Size7/16-20
MaterialSTEEL COMP 316
Material Document and ClassificationAISI 316 ASSN STD SINGLE MATERIAL RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5905-00-108-4936 INTERCHANGEABLE
Resistor,variable,wire Wound,non
2530-00-385-6985F3647 INTERCHANGEABLE
Parts Kit,hydraulic Brake Wheel
Federal Mogul Corp Sub Wagner Brake Moog Automotive Div
Cross-Reference Index
Part NumberManufacturer
55S PRIMARY Operating & Maintenance Specialties Inc (USA)
55-1-4IN316SS Operating & Maintenance Specialties Inc (USA)
Related Parts
5905-00-108-4936INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
2530-00-385-6985INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE WHEEL
F3647

Frequently Asked Questions

What is NSN 6685-01-133-4304?

NSN 6685-01-133-4304 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 6685-01-133-4304?

NSN 6685-01-133-4304 has 2 cross-referenced part numbers: 55S (Operating & Maintenance Specialties Inc), 55-1-4IN316SS (Operating & Maintenance Specialties Inc).

What NSN replaces 6685-01-133-4304?

There are 2 known substitutes for 6685-01-133-4304: 5905-00-108-4936, 2530-00-385-6985. Verify interchangeability with system specifications before substitution.

What are the specifications of 55S?

Key specifications for 55S: Thread Size: 7/16-20; Material: STEEL COMP 316; Material Document and Classification: AISI 316 ASSN STD SINGLE MATERIAL RESPONSE; End Item Identification: POSEIDON SUB/NANY STRATEGIC WEAPON SYS. 4 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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