PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

BACS12B-2Fastener,flare Lock

The Boeing Company Div Defense · NSN 5340-00-597-6074 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-597-6074 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-597-6074. Primary manufacturer part number: BACS12B-2.
Features
  • Fastener,flare Lock — FSC 5340
  • Mounting Method: SCREW
  • Screw Minimum Length for Which Designed: 0.625 INCHES IN
  • Hole Size for Which Designed: 0.297 INCHES NOMINAL IN
  • Features Provided: OPEN SLEEVE
  • Material Thickness Range for Which Designed: +0.045 TO 0.080 INCHES IN
  • Thread Quantity Per Inch: 32
  • Head Diameter: 0.406 INCHES NOMINAL IN
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Fastener,flare Lock, cataloged under National Stock Number 5340-00-597-6074, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is The Boeing Company Div Defense. Government technical data includes 13 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-597-6074
Primary Part NumberBACS12B-2
Item NameFastener,flare Lock
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusACTIVE
Mounting MethodSCREW
Screw Minimum Length for Which Designed0.625 INCHES IN
Hole Size for Which Designed0.297 INCHES NOMINAL IN
Features ProvidedOPEN SLEEVE
Material Thickness Range for Which Designed+0.045 TO 0.080 INCHES IN
Thread Quantity Per Inch32
Head Diameter0.406 INCHES NOMINAL IN
Head StyleFLAT
Head Height0.025 INCHES NOMINAL IN
Style DesignatorCOUNTERBORED SLEEVE
Internal Drive StyleRECESSED
Thread Series DesignatorUNF
Nominal Thread Size0.190 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 5
2990-00-234-3041T-6981 INTERCHANGEABLE
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Cummins Filtration Inc.
5950-00-503-0632136BT INTERCHANGEABLE
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Superior Electric Holding Group Llc Div Specialty Product Technologies
5961-01-099-0082698-1 INTERCHANGEABLE
Rectifier,semiconductor Device,u
Micro Uspd Inc
4320-01-310-644721317 INTERCHANGEABLE
Plate Assembly,balance
Eaton Corporation Div Eaton Fluid Power
5915-01-361-7699A3060816-011 INTERCHANGEABLE
Filter,band Pass
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
Cross-Reference Index
Part NumberManufacturer
6981 Eaton Corporation Dba Air Controls Division Div Air Controls Division (USA)
BACS12B-2 PRIMARY The Boeing Company Div Defense (USA)
Related Parts
2990-00-234-3041INTERCHANGEABLE
MUFFLER,EXHAUST
T-6981
5950-00-503-0632INTERCHANGEABLE
TRANSFORMER,POWER
136BT
5961-01-099-0082INTERCHANGEABLE
RECTIFIER,SEMICONDUCTOR DEVICE,U
698-1
4320-01-310-6447INTERCHANGEABLE
PLATE ASSEMBLY,BALANCE
21317
5915-01-361-7699INTERCHANGEABLE
FILTER,BAND PASS
A3060816-011

Frequently Asked Questions

What is NSN 5340-00-597-6074?

NSN 5340-00-597-6074 is a Fastener,flare Lock, manufactured by The Boeing Company Div Defense, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-597-6074?

NSN 5340-00-597-6074 has 2 cross-referenced part numbers: 6981 (Eaton Corporation Dba Air Controls Division Div Air Controls Division), BACS12B-2 (The Boeing Company Div Defense).

What NSN replaces 5340-00-597-6074?

There are 5 known substitutes for 5340-00-597-6074: 2990-00-234-3041, 5950-00-503-0632, 5961-01-099-0082 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of BACS12B-2?

Key specifications for BACS12B-2: Mounting Method: SCREW; Screw Minimum Length for Which Designed: 0.625 INCHES IN; Hole Size for Which Designed: 0.297 INCHES NOMINAL IN; Features Provided: OPEN SLEEVE. 13 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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