PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILL3851Loop,strap Fastener

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5340-00-257-4954 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-257-4954 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-257-4954. Primary manufacturer part number: MILL3851.
Features
  • Loop,strap Fastener — FSC 5340
  • Outside Width: 0.844 INCHES NOMINAL IN
  • Material: COPPER ALLOY
  • Style Designator: DOUBLE OPENING
  • Inside Length: 1.312 INCHES NOMINAL IN
  • Painted Feature: NOT INCLUDED
  • 1 verified cross-reference
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Applications requiring Copper Alloy construction
General Description

The Loop,strap Fastener, cataloged under National Stock Number 5340-00-257-4954, 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 5 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.

Technical Specifications
ParameterValue
NSN5340-00-257-4954
Primary Part NumberMILL3851
Item NameLoop,strap Fastener
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Outside Width0.844 INCHES NOMINAL IN
MaterialCOPPER ALLOY
Style DesignatorDOUBLE OPENING
Inside Length1.312 INCHES NOMINAL IN
Painted FeatureNOT INCLUDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
Buckle
5340-00-290-0956 INTERCHANGEABLE
Buckle
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
5340-00-290-0956INTERCHANGEABLE
BUCKLE

Frequently Asked Questions

What is NSN 5340-00-257-4954?

NSN 5340-00-257-4954 is a Loop,strap Fastener, 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 5340-00-257-4954?

NSN 5340-00-257-4954 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 5340-00-257-4954?

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

What are the specifications of MILL3851?

Key specifications for MILL3851: Overall Length: 1.625 INCHES NOMINAL IN; Outside Width: 0.844 INCHES NOMINAL IN; Material: COPPER ALLOY; Style Designator: DOUBLE OPENING. 6 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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