PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11-851Crowfoot Attachment,socket Wrenc

Armstrong Bros Tool Co · NSN 5120-01-367-3320 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-367-3320 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-367-3320. Primary manufacturer part number: 11-851.
Features
  • Crowfoot Attachment,socket Wrenc — FSC 5120
  • Style Designator: OPEN END
  • Wrenching Surface Shape: OVAL SINGLE END INTERNAL
  • Wrenching Surface Size: 0.438 INCHES NOMINAL SINGLE END IN
  • Material: STEEL OVERALL
  • Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
  • Surface Treatment: CHROMIUM OVERALL
  • Drive End Shape: SQUARE SINGLE END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Crowfoot Attachment,socket Wrenc, cataloged under National Stock Number 5120-01-367-3320, 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 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN5120-01-367-3320
Primary Part Number11-851
Item NameCrowfoot Attachment,socket Wrenc
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerArmstrong Bros Tool Co
StatusACTIVE
Style DesignatorOPEN END
Wrenching Surface ShapeOVAL SINGLE END INTERNAL
Wrenching Surface Size0.438 INCHES NOMINAL SINGLE END IN
MaterialSTEEL OVERALL
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Surface TreatmentCHROMIUM OVERALL
Drive End ShapeSQUARE SINGLE END INTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5950-00-175-485311851 INTERCHANGEABLE
Saturable Reactor
Standex Electronics, Inc.
3040-00-354-3393 INTERCHANGEABLE
Shaft,shouldered
5950-00-767-5135 INTERCHANGEABLE
Coil,radio Frequency
6625-00-831-4046 INTERCHANGEABLE
Test Set,interconnecting Box
5945-00-923-42919M0990 INTERCHANGEABLE
Relay,electromagnetic
Caterpillar Inc Div Caterpillar Defense
5940-01-121-03657K4474 INTERCHANGEABLE
Terminal,quick Disconnect
Caterpillar Inc Div Caterpillar Defense
2530-01-593-852230-591 INTERCHANGEABLE
Reservoir,remote,power Steering
Konrad Marine Inc Div Konrad Marine
Cross-Reference Index
Part NumberManufacturer
11-851 Armstrong Bros Tool Co (USA)
11-851 Apex Tool Group, Llc Dba Nicholson (USA)
11-851 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
Related Parts
5950-00-175-4853INTERCHANGEABLE
SATURABLE REACTOR
11851
3040-00-354-3393INTERCHANGEABLE
SHAFT,SHOULDERED
5950-00-767-5135INTERCHANGEABLE
COIL,RADIO FREQUENCY
6625-00-831-4046INTERCHANGEABLE
TEST SET,INTERCONNECTING BOX
5945-00-923-4291INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
9M0990
5940-01-121-0365INTERCHANGEABLE
TERMINAL,QUICK DISCONNECT
7K4474
2530-01-593-8522INTERCHANGEABLE
RESERVOIR,REMOTE,POWER STEERING
30-591

Frequently Asked Questions

What is NSN 5120-01-367-3320?

NSN 5120-01-367-3320 is a Crowfoot Attachment,socket Wrenc, manufactured by Armstrong Bros Tool Co, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-367-3320?

NSN 5120-01-367-3320 has 3 cross-referenced part numbers: 11-851 (Armstrong Bros Tool Co), 11-851 (Apex Tool Group, Llc Dba Nicholson), 11-851 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.).

What NSN replaces 5120-01-367-3320?

There are 7 known substitutes for 5120-01-367-3320: 5950-00-175-4853, 3040-00-354-3393, 5950-00-767-5135 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11-851?

Key specifications for 11-851: Overall Length: 2.125 INCHES NOMINAL IN; Style Designator: OPEN END; Wrenching Surface Shape: OVAL SINGLE END INTERNAL; Wrenching Surface Size: 0.438 INCHES NOMINAL SINGLE END IN. 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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