PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

177APlumb Bob

L.s. Starrett Company (the) Div Tool Division · NSN 5210-00-181-1550 · FSC 5210 · No Item Name Available
Verified by PartsTable
NSN 5210-00-181-1550 — this item is cataloged by the U.S. Government under National Stock Number 5210-00-181-1550. Primary manufacturer part number: 177A.
Features
  • Plumb Bob — FSC 5210
  • Material: STEEL
  • Point Removability: REMOVABLE
  • Accessory Components and Quantity: BRAIDED 8 FT LG SILK LINE FT
  • Body Type: SOLID
  • Mercury Filled Feature: NOT INCLUDED
  • 2 verified cross-references
  • Primary manufacturer: L.s. Starrett Company (the) Div Tool Division
Applications
  • Applications requiring Steel construction
General Description

The Plumb Bob, cataloged under National Stock Number 5210-00-181-1550, is classified within Federal Supply Class 5210 (No Item Name Available) of the Measuring Tools group. The primary manufacturer of record is L.s. Starrett Company (the) Div Tool Division. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5210-00-181-1550
Primary Part Number177A
Item NamePlumb Bob
FSC / FSG5210 / 52 — No Item Name Available
ManufacturerL.s. Starrett Company (the) Div Tool Division
StatusACTIVE
MaterialSTEEL
Point RemovabilityREMOVABLE
Accessory Components and QuantityBRAIDED 8 FT LG SILK LINE FT
Body TypeSOLID
Mercury Filled FeatureNOT INCLUDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5325-00-530-961085-11-660-16 INTERCHANGEABLE
Stud,turnlock Fastener
Southco Inc
5935-00-851-28821211015A070-000 INTERCHANGEABLE
Connector,receptacle,electrical
Delta Electronics Manufacturing Corp Div Delta Electronics Mfg. Corp.
5935-01-381-02805066-0 INTERCHANGEABLE
Connector,plug,electrical
Fluke Electronics Corp
5305-01-528-1196 INTERCHANGEABLE
Screw,machine
Cross-Reference Index
Part NumberManufacturer
177A PRIMARY L.s. Starrett Company (the) Div Tool Division (USA)
50660 L.s. Starrett Company (the) Div Tool Division (USA)
Related Parts
5325-00-530-9610INTERCHANGEABLE
STUD,TURNLOCK FASTENER
85-11-660-16
5935-00-851-2882INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
1211015A070-000
5935-01-381-0280INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5066-0
5305-01-528-1196INTERCHANGEABLE
SCREW,MACHINE

Frequently Asked Questions

What is NSN 5210-00-181-1550?

NSN 5210-00-181-1550 is a Plumb Bob, manufactured by L.s. Starrett Company (the) Div Tool Division, classified under FSC 5210 (No Item Name Available). Status: active.

What are the part numbers for NSN 5210-00-181-1550?

NSN 5210-00-181-1550 has 2 cross-referenced part numbers: 177A (L.s. Starrett Company (the) Div Tool Division), 50660 (L.s. Starrett Company (the) Div Tool Division).

What NSN replaces 5210-00-181-1550?

There are 4 known substitutes for 5210-00-181-1550: 5325-00-530-9610, 5935-00-851-2882, 5935-01-381-0280 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 177A?

Key specifications for 177A: Weight: 2.750 OUNCES OZ; Material: STEEL; Special Features: HEXAGONAL HEAD TO PREVENT ROLLING; Point Removability: REMOVABLE. 7 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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