PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21391Strap,safety,industrial

Buckingham Mfg Co Inc · NSN 4240-01-340-7936 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-01-340-7936 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-340-7936. Primary manufacturer part number: 21391.
Features
  • Strap,safety,industrial — FSC 4240
  • Material: PLASTIC POLYAMIDE NYLON
  • Length: 52.000 INCHES NOMINAL IN
  • Style Designator: DOUBLE TONGUE BUCKEL
  • Width: 1.000 INCHES NOMINAL IN
  • 1 verified cross-reference
  • Primary manufacturer: Buckingham Mfg Co Inc
Applications
  • Applications requiring Plastic Polyamide Nylon construction
General Description

The Strap,safety,industrial, cataloged under National Stock Number 4240-01-340-7936, is classified within Federal Supply Class 4240 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Buckingham Mfg Co Inc. Government technical data includes 4 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4240-01-340-7936
Primary Part Number21391
Item NameStrap,safety,industrial
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerBuckingham Mfg Co Inc
StatusACTIVE
MaterialPLASTIC POLYAMIDE NYLON
Length52.000 INCHES NOMINAL IN
Style DesignatorDOUBLE TONGUE BUCKEL
Width1.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4330-00-277-329721391 INTERCHANGEABLE
Filter Element,fluid
Arvinmeritor Inc
5915-00-412-4384402793-001 INTERCHANGEABLE
Filter,band Pass
Tegam, Inc.
5999-00-499-627621-391 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
5970-00-616-63352-139-1 INTERCHANGEABLE
Insulator,plate
Precision Aerospace Corporation Dba Precision Engine Control
5930-00-844-847021391 INTERCHANGEABLE
Switch,thermostatic
Sensata Technologies, Inc. Div Sensata Attleboro
4820-01-424-120221391-001 INTERCHANGEABLE
Valve,linear,directional Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
5975-01-632-0556 INTERCHANGEABLE
Socket and Cap Asse
Cross-Reference Index
Part NumberManufacturer
21391 PRIMARY Buckingham Mfg Co Inc (USA)
Related Parts
4330-00-277-3297INTERCHANGEABLE
FILTER ELEMENT,FLUID
21391
5915-00-412-4384INTERCHANGEABLE
FILTER,BAND PASS
402793-001
5999-00-499-6276INTERCHANGEABLE
CONTACT,ELECTRICAL
21-391
5970-00-616-6335INTERCHANGEABLE
INSULATOR,PLATE
2-139-1
5930-00-844-8470INTERCHANGEABLE
SWITCH,THERMOSTATIC
21391
4820-01-424-1202INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21391-001
5975-01-632-0556INTERCHANGEABLE
SOCKET AND CAP ASSE

Frequently Asked Questions

What is NSN 4240-01-340-7936?

NSN 4240-01-340-7936 is a Strap,safety,industrial, manufactured by Buckingham Mfg Co Inc, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-01-340-7936?

NSN 4240-01-340-7936 has 1 cross-referenced part number: 21391 (Buckingham Mfg Co Inc).

What NSN replaces 4240-01-340-7936?

There are 7 known substitutes for 4240-01-340-7936: 4330-00-277-3297, 5915-00-412-4384, 5999-00-499-6276 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21391?

Key specifications for 21391: Material: PLASTIC POLYAMIDE NYLON; Length: 52.000 INCHES NOMINAL IN; Style Designator: DOUBLE TONGUE BUCKEL; Width: 1.000 INCHES NOMINAL IN. 4 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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