PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

BW-10AWrench,open End

Williams J H Industrial Products Inc · NSN 5120-00-277-1245 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-277-1245 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-277-1245. Primary manufacturer part number: BW-10A.
Features
  • Wrench,open End — FSC 5120
  • Departure From Cited Document: AS MODIFIED BY SURFACE TREATMENT
  • Head Thickness: 0.875 INCHES MAXIMUM IN
  • Wrenching Surface Size: 1.688 INCHES NOMINAL SINGLE END IN
  • Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM
  • Material: STEEL OVERALL
  • Surface Treatment: OXIDE OVERALL
  • Torque Capacity: 17280.0 INCH-POUNDS MINIMUM IN
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,open End, cataloged under National Stock Number 5120-00-277-1245, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Williams J H Industrial Products Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-277-1245
Primary Part NumberBW-10A
Item NameWrench,open End
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerWilliams J H Industrial Products Inc
StatusCANCELLED
Departure From Cited DocumentAS MODIFIED BY SURFACE TREATMENT
Head Thickness0.875 INCHES MAXIMUM IN
Wrenching Surface Size1.688 INCHES NOMINAL SINGLE END IN
Hardness Rating40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM
MaterialSTEEL OVERALL
Surface TreatmentOXIDE OVERALL
Torque Capacity17280.0 INCH-POUNDS MINIMUM IN
Wrenching Surface ShapeOVAL SINGLE END INTERNAL
Head Angle15.0 DEGREES NOMINAL
Style DesignatorSINGLE HEAD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6625-00-078-5631 INTERCHANGEABLE
Plug-in Unit,electrical-Electron
5120-00-223-1015 INTERCHANGEABLE
Punch,drive Pin
6760-00-347-6859 INTERCHANGEABLE
Test Chart Set,microcopy Resolut
6625-00-472-99101010A INTERCHANGEABLE
Oscilloscope
Ballantine Laboratories Inc
5330-00-484-62801010A INTERCHANGEABLE
Gasket
Sears, Roebuck and Co. Dba Sears Div Sears Commercial
2805-00-774-4796300460 INTERCHANGEABLE
Valve,poppet,engine
Renk America Llc Div Renk America
5996-00-911-1608 INTERCHANGEABLE
Amplifier,radio Frequency
5360-01-046-6808300460 INTERCHANGEABLE
Spring,helical,compression
Ships Machinery International, Inc.
6750-01-052-6008 INTERCHANGEABLE
Film,photographic
6625-01-189-78981010A INTERCHANGEABLE
Microdensitometer
Applied Biosystems, Llc Dba Life Technologies
Cross-Reference Index
Part NumberManufacturer
BW-10A Williams J H Industrial Products Inc (USA)
31-054 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
30-0460 Martin Sprocket and Gear Inc (USA)
1010A Trw Inc Hand Tools Div Trw Industrial Products Group (USA)
31-054 Apex Tool Group, Llc Dba Nicholson (USA)
10A Trw Inc Hand Tools Div Trw Industrial Products Group (USA)
10A Martin Sprocket and Gear Inc (USA)
GGG-W-636 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
A-A-1357 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
GGG-W-636 TY5 General Services Administration Federal Supply Service (USA)
31-054 Armstrong Bros Tool Co (USA)
Related Parts
6625-00-078-5631INTERCHANGEABLE
PLUG-IN UNIT,ELECTRICAL-ELECTRON
5120-00-223-1015INTERCHANGEABLE
PUNCH,DRIVE PIN
6760-00-347-6859INTERCHANGEABLE
TEST CHART SET,MICROCOPY RESOLUT
6625-00-472-9910INTERCHANGEABLE
OSCILLOSCOPE
1010A
5330-00-484-6280INTERCHANGEABLE
GASKET
1010A
2805-00-774-4796INTERCHANGEABLE
VALVE,POPPET,ENGINE
300460
5996-00-911-1608INTERCHANGEABLE
AMPLIFIER,RADIO FREQUENCY
5360-01-046-6808INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
300460
6750-01-052-6008INTERCHANGEABLE
FILM,PHOTOGRAPHIC
6625-01-189-7898INTERCHANGEABLE
MICRODENSITOMETER
1010A
6220-01-226-9615INTERCHANGEABLE
LAMP UNIT,VEHICULAR
6685-01-270-8609INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
1010A

Frequently Asked Questions

What is NSN 5120-00-277-1245?

NSN 5120-00-277-1245 is a Wrench,open End, manufactured by Williams J H Industrial Products Inc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-277-1245?

NSN 5120-00-277-1245 has 11 cross-referenced part numbers: BW-10A (Williams J H Industrial Products Inc), 31-054 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.), 30-0460 (Martin Sprocket and Gear Inc), 1010A (Trw Inc Hand Tools Div Trw Industrial Products Group), 31-054 (Apex Tool Group, Llc Dba Nicholson) and 6 more.

What NSN replaces 5120-00-277-1245?

There are 12 known substitutes for 5120-00-277-1245: 6625-00-078-5631, 5120-00-223-1015, 6760-00-347-6859 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of BW-10A?

Key specifications for BW-10A: Departure From Cited Document: AS MODIFIED BY SURFACE TREATMENT; Head Thickness: 0.875 INCHES MAXIMUM IN; Wrenching Surface Size: 1.688 INCHES NOMINAL SINGLE END IN; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-277-1245 still in active supply?

NSN 5120-00-277-1245 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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