PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B1971Retainer,snap Ring

Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic · NSN 3010-00-001-7812 · FSC 3010 · No Item Name Available
Verified by PartsTable
NSN 3010-00-001-7812 — this item is cataloged by the U.S. Government under National Stock Number 3010-00-001-7812. Primary manufacturer part number: B1971.
Features
  • Retainer,snap Ring — FSC 3010
  • General Characteristics Item Description: STEEL,5.250 INCHES OD,0.375 INCH O/A LG,4.000 INCHES BORE DIA,COUNTERBORED-4.375 INCHES DIA BY 0.125 INCH DEEP. IN
  • 1 verified cross-reference
  • Primary manufacturer: Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Retainer,snap Ring, cataloged under National Stock Number 3010-00-001-7812, is classified within Federal Supply Class 3010 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 1 verified specification, 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3010-00-001-7812
Primary Part NumberB1971
Item NameRetainer,snap Ring
FSC / FSG3010 / 30 — No Item Name Available
ManufacturerTwin Disc, Incorporated Dba Twin Disc Mid-Atlantic
StatusACTIVE
General Characteristics Item DescriptionSTEEL,5.250 INCHES OD,0.375 INCH O/A LG,4.000 INCHES BORE DIA,COUNTERBORED-4.375 INCHES DIA BY 0.125 INCH DEEP. IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5945-00-463-9956B1971 INTERCHANGEABLE
Relay,thermal
Meggitt (new Hampshire), Inc
5315-00-903-5935MS20392-4C83 INTERCHANGEABLE
Pin,straight,headed
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
B1971 PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
Related Parts
5945-00-463-9956INTERCHANGEABLE
RELAY,THERMAL
B1971
5315-00-903-5935INTERCHANGEABLE
PIN,STRAIGHT,HEADED
MS20392-4C83

Frequently Asked Questions

What is NSN 3010-00-001-7812?

NSN 3010-00-001-7812 is a Retainer,snap Ring, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 3010 (No Item Name Available). Status: active.

What are the part numbers for NSN 3010-00-001-7812?

NSN 3010-00-001-7812 has 1 cross-referenced part number: B1971 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).

What NSN replaces 3010-00-001-7812?

There are 2 known substitutes for 3010-00-001-7812: 5945-00-463-9956, 5315-00-903-5935. Verify interchangeability with system specifications before substitution.

What are the specifications of B1971?

Key specifications for B1971: General Characteristics Item Description: STEEL,5.250 INCHES OD,0.375 INCH O/A LG,4.000 INCHES BORE DIA,COUNTERBORED-4.375 INCHES DIA BY 0.125 INCH DEEP. IN. 1 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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