PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

P-51BPilot,counterbore

Wright Machine & Tool Co., Inc. · NSN 3460-01-140-0261 · FSC 3460 · No Item Name Available
Verified by PartsTable
NSN 3460-01-140-0261 — this item is cataloged by the U.S. Government under National Stock Number 3460-01-140-0261. Primary manufacturer part number: P-51B.
Features
  • Pilot,counterbore — FSC 3460
  • Shank Type: THREADED
  • Head Length: 0.625 INCHES NOMINAL IN
  • Shank Diameter: 0.312 INCHES NOMINAL IN
  • Head Diameter: 0.648 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Wright Machine & Tool Co., Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Pilot,counterbore, cataloged under National Stock Number 3460-01-140-0261, is classified within Federal Supply Class 3460 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Wright Machine & Tool Co., Inc.. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3460-01-140-0261
Primary Part NumberP-51B
Item NamePilot,counterbore
FSC / FSG3460 / 34 — No Item Name Available
ManufacturerWright Machine & Tool Co., Inc.
StatusACTIVE
Shank TypeTHREADED
Head Length0.625 INCHES NOMINAL IN
Shank Diameter0.312 INCHES NOMINAL IN
Head Diameter0.648 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
3940-01-632-7879P51B INTERCHANGEABLE
Block,tackle
Rock Exotica
Cross-Reference Index
Part NumberManufacturer
P-51B Ex-Cell-O Corp Tool and Abrasive Products Div (USA)
P-51B PRIMARY Wright Machine & Tool Co., Inc. (USA)
Related Parts
3940-01-632-7879INTERCHANGEABLE
BLOCK,TACKLE
P51B

Frequently Asked Questions

What is NSN 3460-01-140-0261?

NSN 3460-01-140-0261 is a Pilot,counterbore, manufactured by Wright Machine & Tool Co., Inc., classified under FSC 3460 (No Item Name Available). Status: active.

What are the part numbers for NSN 3460-01-140-0261?

NSN 3460-01-140-0261 has 2 cross-referenced part numbers: P-51B (Ex-Cell-O Corp Tool and Abrasive Products Div), P-51B (Wright Machine & Tool Co., Inc.).

What NSN replaces 3460-01-140-0261?

There is 1 known substitute for 3460-01-140-0261: 3940-01-632-7879. Verify interchangeability with system specifications before substitution.

What are the specifications of P-51B?

Key specifications for P-51B: Shank Type: THREADED; Head Length: 0.625 INCHES NOMINAL IN; Shank Diameter: 0.312 INCHES NOMINAL IN; Head Diameter: 0.648 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN. 4 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com