PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C491Wrench,spanner

The Stanley Works Dba Stanley Proto · NSN 5120-01-428-5017 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-428-5017 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-428-5017. Primary manufacturer part number: C491.
Features
  • Wrench,spanner — FSC 5120
  • Style Designator: ADJUSTABLE PIN
  • Surface Treatment: OXIDE OVERALL
  • Material: STEEL OVERALL
  • Nondefinitive Spec/std Data: 2 TYPE AND 2 CLASS
  • Specification/standard Data: 0U583-SAE AS6018 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Pin Diameter: 0.125 INCHES NOMINAL IN
  • Opening Diameter: 0.750 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,spanner, cataloged under National Stock Number 5120-01-428-5017, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The Stanley Works Dba Stanley Proto. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 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
NSN5120-01-428-5017
Primary Part NumberC491
Item NameWrench,spanner
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusACTIVE
Style DesignatorADJUSTABLE PIN
Surface TreatmentOXIDE OVERALL
MaterialSTEEL OVERALL
Nondefinitive Spec/std Data2 TYPE AND 2 CLASS
Specification/standard Data0U583-SAE AS6018 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Pin Diameter0.125 INCHES NOMINAL IN
Opening Diameter0.750 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5120-00-061-4785 INTERCHANGEABLE
Wrench,spanner
5120-00-157-21330-474 INTERCHANGEABLE
Wrench,spanner
Martin Sprocket and Gear Inc
5120-00-288-9281 INTERCHANGEABLE
Wrench,spanner
2910-00-354-47569B4955 INTERCHANGEABLE
Tip
Caterpillar Inc Div Caterpillar Defense
5120-00-729-631011523T1 INTERCHANGEABLE
Wrench,spanner
Dresser Industries Inc Leroi Div
2520-00-768-0743291 INTERCHANGEABLE
Disk,clutch,vehicular
Cmbf Products Inc
5120-01-037-26830-471 INTERCHANGEABLE
Wrench,spanner
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
5120-01-184-7985304APSKA INTERCHANGEABLE
Wrench Set,spanner
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
5120-01-335-0709APS357C INTERCHANGEABLE
Wrench,spanner
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
5120-01-335-0710APS363B INTERCHANGEABLE
Wrench,spanner
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
Cross-Reference Index
Part NumberManufacturer
C491 The Stanley Works Dba Stanley Proto (USA)
AS6018 Society of Automotive Engineers Inc (USA)
AS6018 TY2CL2 General Services Administration Federal Supply Service (USA)
AS6018 Sae International Dba Sae International (USA)
JC491 The Stanley Works Dba Stanley Proto (USA)
1FJ44 W.w. Grainger, Inc. Div Government Sales Division (USA)
Related Parts
5120-00-061-4785INTERCHANGEABLE
WRENCH,SPANNER
5120-00-157-2133INTERCHANGEABLE
WRENCH,SPANNER
0-474
5120-00-288-9281INTERCHANGEABLE
WRENCH,SPANNER
2910-00-354-4756INTERCHANGEABLE
TIP
9B4955
5120-00-729-6310INTERCHANGEABLE
WRENCH,SPANNER
11523T1
2520-00-768-0743INTERCHANGEABLE
DISK,CLUTCH,VEHICULAR
291
5120-01-037-2683INTERCHANGEABLE
WRENCH,SPANNER
0-471
5120-01-184-7985INTERCHANGEABLE
WRENCH SET,SPANNER
304APSKA
5120-01-335-0709INTERCHANGEABLE
WRENCH,SPANNER
APS357C
5120-01-335-0710INTERCHANGEABLE
WRENCH,SPANNER
APS363B
5120-01-335-0711INTERCHANGEABLE
WRENCH,SPANNER
APS366C
5120-01-337-0510INTERCHANGEABLE
WRENCH,SPANNER

Frequently Asked Questions

What is NSN 5120-01-428-5017?

NSN 5120-01-428-5017 is a Wrench,spanner, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-428-5017?

NSN 5120-01-428-5017 has 6 cross-referenced part numbers: C491 (The Stanley Works Dba Stanley Proto), AS6018 (Society of Automotive Engineers Inc), AS6018 TY2CL2 (General Services Administration Federal Supply Service), AS6018 (Sae International Dba Sae International), JC491 (The Stanley Works Dba Stanley Proto) and 1 more.

What NSN replaces 5120-01-428-5017?

There are 12 known substitutes for 5120-01-428-5017: 5120-00-061-4785, 5120-00-157-2133, 5120-00-288-9281 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C491?

Key specifications for C491: Overall Length: 6.375 INCHES NOMINAL IN; Style Designator: ADJUSTABLE PIN; Surface Treatment: OXIDE OVERALL; Material: STEEL OVERALL. 8 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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