PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILL3851Buckle

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5340-00-290-0956 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-290-0956 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-290-0956. Primary manufacturer part number: MILL3851.
Features
  • Buckle — FSC 5340
  • Nondefinitive Spec/std Data: 1 CLASS AND 2 STYLE AND A CONSTRUCTION
  • Material: COPPER ALLOY OVERALL
  • Buckle Style Designator: CENTER BAR
  • Insignia: NOT INCLUDED
  • Strap Accommodation Width: 2.060 INCHES NOMINAL IN
  • Enameled Feature: NOT INCLUDED
  • Specific Usage Design: EQUIPAGE ITEMS
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Buckle, cataloged under National Stock Number 5340-00-290-0956, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 7 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-290-0956
Primary Part NumberMILL3851
Item NameBuckle
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Nondefinitive Spec/std Data1 CLASS AND 2 STYLE AND A CONSTRUCTION
MaterialCOPPER ALLOY OVERALL
Buckle Style DesignatorCENTER BAR
InsigniaNOT INCLUDED
Strap Accommodation Width2.060 INCHES NOMINAL IN
Enameled FeatureNOT INCLUDED
Specific Usage DesignEQUIPAGE ITEMS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 2
Buckle
5340-00-257-4954 INTERCHANGEABLE
Loop,strap Fastener
Cross-Reference Index
Part NumberManufacturer
MILL3851 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5340-01-359-4762SUCCESSOR
BUCKLE
5340-00-257-4954INTERCHANGEABLE
LOOP,STRAP FASTENER

Frequently Asked Questions

What is NSN 5340-00-290-0956?

NSN 5340-00-290-0956 is a Buckle, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-290-0956?

NSN 5340-00-290-0956 has 1 cross-referenced part number: MILL3851 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5340-00-290-0956?

There are 2 known substitutes for 5340-00-290-0956: 5340-01-359-4762, 5340-00-257-4954. Verify interchangeability with system specifications before substitution.

What are the specifications of MILL3851?

Key specifications for MILL3851: Overall Width: 2.360 INCHES NOMINAL IN; Nondefinitive Spec/std Data: 1 CLASS AND 2 STYLE AND A CONSTRUCTION; Material: COPPER ALLOY OVERALL; Buckle Style Designator: CENTER BAR. 9 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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