PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8571Wrench,open End

Stanley Engineered Fastening Llc · NSN 5120-01-128-3804 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-128-3804 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-128-3804. Primary manufacturer part number: 8571.
Features
  • Wrench,open End — FSC 5120
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
  • 1 verified cross-reference
  • Primary manufacturer: Stanley Engineered Fastening Llc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Wrench,open End, cataloged under National Stock Number 5120-01-128-3804, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Stanley Engineered Fastening Llc. Government technical data includes 2 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-128-3804
Primary Part Number8571
Item NameWrench,open End
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerStanley Engineered Fastening Llc
StatusACTIVE
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2990-00-019-0459T-8571 INTERCHANGEABLE
Muffler,exhaust
Cummins Filtration Inc.
2805-00-356-0983 INTERCHANGEABLE
Gage,oil Level Bayo
2805-00-561-55608571 INTERCHANGEABLE
Spring,helical,comp
Brinkley Technology Group Llc Dba Hercules Manufacturing
6130-00-934-16278571 INTERCHANGEABLE
Power Supply
Centroid, Inc. Dba Centroid Inc
5895-01-074-51108571 INTERCHANGEABLE
Detector,radio Frequency
Telonic Berkeley, Inc. Dba Telonic Berkeley
4820-01-127-40158571 INTERCHANGEABLE
Stem,fluid Valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
6220-01-201-9970249-08571 INTERCHANGEABLE
Light,marker,clearance
Rogers Brothers Corp
6670-01-310-3516 INTERCHANGEABLE
Scale,weighing
7310-01-371-01418571 INTERCHANGEABLE
Coffee Maker,automatic
Bloomfield Industries
5325-01-390-8411857-1 INTERCHANGEABLE
Ring,retaining
Globe Food Equipment Company
Cross-Reference Index
Part NumberManufacturer
8571 Stanley Engineered Fastening Llc (USA)
Related Parts
2990-00-019-0459INTERCHANGEABLE
MUFFLER,EXHAUST
T-8571
2805-00-356-0983INTERCHANGEABLE
GAGE,OIL LEVEL BAYO
2805-00-561-5560INTERCHANGEABLE
SPRING,HELICAL,COMP
8571
6130-00-934-1627INTERCHANGEABLE
POWER SUPPLY
8571
5895-01-074-5110INTERCHANGEABLE
DETECTOR,RADIO FREQUENCY
8571
4820-01-127-4015INTERCHANGEABLE
STEM,FLUID VALVE
8571
6220-01-201-9970INTERCHANGEABLE
LIGHT,MARKER,CLEARANCE
249-08571
6670-01-310-3516INTERCHANGEABLE
SCALE,WEIGHING
7310-01-371-0141INTERCHANGEABLE
COFFEE MAKER,AUTOMATIC
8571
5325-01-390-8411INTERCHANGEABLE
RING,RETAINING
857-1
6540-01-565-0585INTERCHANGEABLE
INSERT,OPTICAL,CHEMICAL-BIOLOGIC
6515-01-573-2291INTERCHANGEABLE
GUIDEWIRE,FIXATION IMPLANT
8571

Frequently Asked Questions

What is NSN 5120-01-128-3804?

NSN 5120-01-128-3804 is a Wrench,open End, manufactured by Stanley Engineered Fastening Llc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-128-3804?

NSN 5120-01-128-3804 has 1 cross-referenced part number: 8571 (Stanley Engineered Fastening Llc).

What NSN replaces 5120-01-128-3804?

There are 12 known substitutes for 5120-01-128-3804: 2990-00-019-0459, 2805-00-356-0983, 2805-00-561-5560 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8571?

Key specifications for 8571: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.. 2 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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