PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

H14Wrench,open End

Armstrong Bros Tool Co · NSN 5120-00-277-2341 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-277-2341 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-277-2341. Primary manufacturer part number: H14.
Features
  • Wrench,open End — FSC 5120
  • Large End Head Angle: 15.0 DEGREES NOMINAL
  • Wrenching Surface Size: 0.344 INCHES NOMINAL SECOND END IN
  • Wrenching Surface Size: 0.312 INCHES NOMINAL FIRST END IN
  • Style Designator: DOUBLE HEAD
  • Small End Head Thickness: 0.125 INCHES NOMINAL IN
  • Large End Head Thickness: 0.125 INCHES NOMINAL IN
  • Small End Head Angle: 15.0 DEGREES NOMINAL
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Wrench,open End, cataloged under National Stock Number 5120-00-277-2341, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Armstrong Bros Tool Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-277-2341
Primary Part NumberH14
Item NameWrench,open End
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerArmstrong Bros Tool Co
StatusACTIVE
Large End Head Angle15.0 DEGREES NOMINAL
Wrenching Surface Size0.344 INCHES NOMINAL SECOND END IN
Wrenching Surface Size0.312 INCHES NOMINAL FIRST END IN
Style DesignatorDOUBLE HEAD
Small End Head Thickness0.125 INCHES NOMINAL IN
Large End Head Thickness0.125 INCHES NOMINAL IN
Small End Head Angle15.0 DEGREES NOMINAL
Wrenching Surface ShapeRECTANGULAR BOTH ENDS INTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6850-00-003-1194 INTERCHANGEABLE
Cleaning and Lubricating Compoun
4320-00-218-4323H14 INTERCHANGEABLE
Ring,lantern
Circor Naval Solutions Llc Dba Warren Pumps
3455-00-222-4065 INTERCHANGEABLE
File,rotary
3110-00-554-3291 INTERCHANGEABLE
Bearing,ball,annular
5340-00-598-8041H14 INTERCHANGEABLE
Strap,retaining
Minerallac Electric Co
5935-00-761-4374H14 INTERCHANGEABLE
Clamp,cable,electrical Connector
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
5999-00-785-7854H14 INTERCHANGEABLE
Heater,thermal Release
Siemens Energy and Automation Inc Siemens Furnas Controls Div
5950-00-806-5113H14 INTERCHANGEABLE
Transformer,audio Frequency
Magnetika Inc
5945-01-097-1754H-14 INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
5120-01-116-1038H-14FG INTERCHANGEABLE
Hammer,hand
Ampco Partners, Ltd. Dba Ampco Safety Tools
Cross-Reference Index
Part NumberManufacturer
H14 Armstrong Bros Tool Co (USA)
H14 Apex Tool Group, Llc Dba Nicholson (USA)
H14 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
H14 Bonney Forge Corp (USA)
Related Parts
6850-00-003-1194INTERCHANGEABLE
CLEANING AND LUBRICATING COMPOUN
4320-00-218-4323INTERCHANGEABLE
RING,LANTERN
H14
3455-00-222-4065INTERCHANGEABLE
FILE,ROTARY
3110-00-554-3291INTERCHANGEABLE
BEARING,BALL,ANNULAR
5340-00-598-8041INTERCHANGEABLE
STRAP,RETAINING
H14
5935-00-761-4374INTERCHANGEABLE
CLAMP,CABLE,ELECTRICAL CONNECTOR
H14
5999-00-785-7854INTERCHANGEABLE
HEATER,THERMAL RELEASE
H14
5950-00-806-5113INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
H14
5945-01-097-1754INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
H-14
5120-01-116-1038INTERCHANGEABLE
HAMMER,HAND
H-14FG
6635-01-286-1847INTERCHANGEABLE
COMPARATOR,OPTICAL PROJECTION
1377-01-523-3601INTERCHANGEABLE
CUTTER,CARTRIDGE ACTUATED
012009-1

Frequently Asked Questions

What is NSN 5120-00-277-2341?

NSN 5120-00-277-2341 is a Wrench,open End, manufactured by Armstrong Bros Tool Co, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-277-2341?

NSN 5120-00-277-2341 has 4 cross-referenced part numbers: H14 (Armstrong Bros Tool Co), H14 (Apex Tool Group, Llc Dba Nicholson), H14 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.), H14 (Bonney Forge Corp).

What NSN replaces 5120-00-277-2341?

There are 12 known substitutes for 5120-00-277-2341: 6850-00-003-1194, 4320-00-218-4323, 3455-00-222-4065 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of H14?

Key specifications for H14: Large End Head Angle: 15.0 DEGREES NOMINAL; Wrenching Surface Size: 0.344 INCHES NOMINAL SECOND END IN; Wrenching Surface Size: 0.312 INCHES NOMINAL FIRST END IN; Style Designator: DOUBLE HEAD. 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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