PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31-3BHook,brake Spring Pliers

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-01-520-5431 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-520-5431 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-520-5431. Primary manufacturer part number: 31-3B.
Features
  • Hook,brake Spring Pliers — FSC 5120
  • Material: STEEL
  • 1 verified cross-reference
  • Primary manufacturer: Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel construction
General Description

The Hook,brake Spring Pliers, cataloged under National Stock Number 5120-01-520-5431, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc. Government technical data includes 1 verified specification, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-520-5431
Primary Part Number31-3B
Item NameHook,brake Spring Pliers
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusACTIVE
MaterialSTEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6130-01-025-1537580008 INTERCHANGEABLE
Power Supply
Shigamo Development Inc Div American High Voltage
Cross-Reference Index
Part NumberManufacturer
31-3B PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
Related Parts
6130-01-025-1537INTERCHANGEABLE
POWER SUPPLY
580008

Frequently Asked Questions

What is NSN 5120-01-520-5431?

NSN 5120-01-520-5431 is a Hook,brake Spring Pliers, manufactured by Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-520-5431?

NSN 5120-01-520-5431 has 1 cross-referenced part number: 31-3B (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc).

What NSN replaces 5120-01-520-5431?

There is 1 known substitute for 5120-01-520-5431: 6130-01-025-1537. Verify interchangeability with system specifications before substitution.

What are the specifications of 31-3B?

Key specifications for 31-3B: Material: STEEL; End Item Identification: SNAP-ON NO. 131A BRAKE SPRING PLIERS A. 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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