PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A121-55Insulator,bushing

Seastrom Manufacturing Co Inc · NSN 5970-00-630-1605 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-00-630-1605 — this item is cataloged by the U.S. Government under National Stock Number 5970-00-630-1605. Primary manufacturer part number: A121-55.
Features
  • Insulator,bushing — FSC 5970
  • Shank Height: 0.020 INCHES MINIMUM AND 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM0.030 INCHES MAXIMUM IN
  • Shank Outside Diameter: 0.333 INCHES MINIMUM AND 0.333 INCHES MINIMUM AND 0.343 INCHES MAXIMUM0.343 INCHES MAXIMUM IN
  • Style Designator: SHOULDERSHOULDER
  • Material: PLASTIC POLYAMIDE NYLON OVERALLPLASTIC POLYAMIDE NYLON OVERALL
  • Inside Diameter: 0.255 INCHES MINIMUM AND 0.255 INCHES MINIMUM AND 0.265 INCHES MAXIMUM0.265 INCHES MAXIMUM IN
  • Outside Diameter: 0.500 INCHES MINIMUM AND 0.500 INCHES MINIMUM AND 0.516 INCHES MAXIMUM0.516 INCHES MAXIMUM IN
  • 1 verified cross-reference
Applications
  • Applications requiring Plastic Polyamide Nylon Overallplastic Polyamide Nylon Overall construction
General Description

The Insulator,bushing, cataloged under National Stock Number 5970-00-630-1605, is classified within Federal Supply Class 5970 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Seastrom Manufacturing Co Inc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5970-00-630-1605
Primary Part NumberA121-55
Item NameInsulator,bushing
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerSeastrom Manufacturing Co Inc
StatusACTIVE
Shank Height0.020 INCHES MINIMUM AND 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM0.030 INCHES MAXIMUM IN
Shank Outside Diameter0.333 INCHES MINIMUM AND 0.333 INCHES MINIMUM AND 0.343 INCHES MAXIMUM0.343 INCHES MAXIMUM IN
Style DesignatorSHOULDERSHOULDER
MaterialPLASTIC POLYAMIDE NYLON OVERALLPLASTIC POLYAMIDE NYLON OVERALL
Inside Diameter0.255 INCHES MINIMUM AND 0.255 INCHES MINIMUM AND 0.265 INCHES MAXIMUM0.265 INCHES MAXIMUM IN
Outside Diameter0.500 INCHES MINIMUM AND 0.500 INCHES MINIMUM AND 0.516 INCHES MAXIMUM0.516 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6610-00-955-200612155 INTERCHANGEABLE
Compensator Assy
Aerosonic Llc
Cross-Reference Index
Part NumberManufacturer
A121-55 PRIMARY Seastrom Manufacturing Co Inc (USA)
Related Parts
6610-00-955-2006INTERCHANGEABLE
COMPENSATOR ASSY
12155

Frequently Asked Questions

What is NSN 5970-00-630-1605?

NSN 5970-00-630-1605 is a Insulator,bushing, manufactured by Seastrom Manufacturing Co Inc, classified under FSC 5970 (No Item Name Available). Status: active.

What are the part numbers for NSN 5970-00-630-1605?

NSN 5970-00-630-1605 has 1 cross-referenced part number: A121-55 (Seastrom Manufacturing Co Inc).

What NSN replaces 5970-00-630-1605?

There is 1 known substitute for 5970-00-630-1605: 6610-00-955-2006. Verify interchangeability with system specifications before substitution.

What are the specifications of A121-55?

Key specifications for A121-55: Shank Height: 0.020 INCHES MINIMUM AND 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM0.030 INCHES MAXIMUM IN; Shank Outside Diameter: 0.333 INCHES MINIMUM AND 0.333 INCHES MINIMUM AND 0.343 INCHES MAXIMUM0.343 INCHES MAXIMUM IN; Style Designator: SHOULDERSHOULDER; Material: PLASTIC POLYAMIDE NYLON OVERALLPLASTIC POLYAMIDE NYLON OVERALL. 7 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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