PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3744Stop,mechanical

Bmi Defense Systems, Inc · NSN 5340-01-599-5677 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-599-5677 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-599-5677. Primary manufacturer part number: 3744.
Features
  • Stop,mechanical — FSC 5340
  • Mounting Hole Quantity: 2
  • Mounting Hole Type: COUNTERSUNK
  • Mounting Hole Diameter: 0.250 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Bmi Defense Systems, Inc
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Stop,mechanical, cataloged under National Stock Number 5340-01-599-5677, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Bmi Defense Systems, Inc. Government technical data includes 3 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5340-01-599-5677
Primary Part Number3744
Item NameStop,mechanical
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerBmi Defense Systems, Inc
StatusACTIVE
Mounting Hole Quantity2
Mounting Hole TypeCOUNTERSUNK
Mounting Hole Diameter0.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4920-00-032-96093744 INTERCHANGEABLE
Guide,turbine Rotor
Allison Transmission Inc Dba Allison Transmission, Inc
5935-00-173-7846 INTERCHANGEABLE
Connector,receptacle,electrical
2825-00-399-37443744 INTERCHANGEABLE
Seal Ring Assy
Becker Brothers Graphite Corp
2590-00-737-24187372418 INTERCHANGEABLE
Cable,electrical,in
U S Army Tank Automotive Command Amsta-Im-Mm
5950-00-943-9221T053-002-0001 INTERCHANGEABLE
Transformer,power
L3harris Interstate Electronics Corporation
4820-01-314-3975B-M-374-4 ITEM 374 INTERCHANGEABLE
Valve,check
Hunt Valve Company, Inc.
6515-01-380-35110037440 INTERCHANGEABLE
Catheter,urethral
Davol Inc
6540-01-553-015111735 INTERCHANGEABLE
Ophthalmoscope Head,prestige Coa
Welch Allyn, Inc.
Cross-Reference Index
Part NumberManufacturer
3744 PRIMARY Bmi Defense Systems, Inc (USA)
3924458C1 Nd Defense Llc (USA)
Related Parts
4920-00-032-9609INTERCHANGEABLE
GUIDE,TURBINE ROTOR
3744
5935-00-173-7846INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
2825-00-399-3744INTERCHANGEABLE
SEAL RING ASSY
3744
2590-00-737-2418INTERCHANGEABLE
CABLE,ELECTRICAL,IN
7372418
5950-00-943-9221INTERCHANGEABLE
TRANSFORMER,POWER
T053-002-0001
4820-01-314-3975INTERCHANGEABLE
VALVE,CHECK
B-M-374-4 ITEM 374
6515-01-380-3511INTERCHANGEABLE
CATHETER,URETHRAL
0037440
6540-01-553-0151INTERCHANGEABLE
OPHTHALMOSCOPE HEAD,PRESTIGE COA
11735

Frequently Asked Questions

What is NSN 5340-01-599-5677?

NSN 5340-01-599-5677 is a Stop,mechanical, manufactured by Bmi Defense Systems, Inc, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-599-5677?

NSN 5340-01-599-5677 has 2 cross-referenced part numbers: 3744 (Bmi Defense Systems, Inc), 3924458C1 (Nd Defense Llc).

What NSN replaces 5340-01-599-5677?

There are 8 known substitutes for 5340-01-599-5677: 4920-00-032-9609, 5935-00-173-7846, 2825-00-399-3744 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3744?

Key specifications for 3744: Mounting Hole Quantity: 2; Part Name Assigned by Controlling Agency: STOP, ALIGNMENT, GUNNER STAND; Overall Length: 1.750 INCHES NOMINAL IN; Overall Height: 0.375 INCHES NOMINAL IN. 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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