PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11-1257Puller,mechanical

Telsmith Inc Div of Astec Industries Inc · NSN 5120-00-142-3807 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-142-3807 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-142-3807. Primary manufacturer part number: 11-1257.
Features
  • Puller,mechanical — FSC 5120
  • Spread Range: 1.500 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN
  • Reach Length: 3.250 INCHES NOMINAL IN
  • Style Designator: GEAR AND TERMINAL, TWO JAW, EXTERNAL
  • 3 verified cross-references
  • Primary manufacturer: Telsmith Inc Div of Astec Industries Inc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Puller,mechanical, cataloged under National Stock Number 5120-00-142-3807, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Telsmith Inc Div of Astec Industries Inc. Government technical data includes 3 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-142-3807
Primary Part Number11-1257
Item NamePuller,mechanical
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerTelsmith Inc Div of Astec Industries Inc
StatusACTIVE
Spread Range1.500 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN
Reach Length3.250 INCHES NOMINAL IN
Style DesignatorGEAR AND TERMINAL, TWO JAW, EXTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5920-00-557-2647 INTERCHANGEABLE
Fuse,cartridge
5910-00-852-0272111257 INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services
Cross-Reference Index
Part NumberManufacturer
11-1257 Unison Industries Llc (USA)
11-1257 Amphenol Corp Div Amphenol Aerospace Operations (USA)
11-1257 PRIMARY Telsmith Inc Div of Astec Industries Inc (USA)
Related Parts
5920-00-557-2647INTERCHANGEABLE
FUSE,CARTRIDGE
5910-00-852-0272INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
111257

Frequently Asked Questions

What is NSN 5120-00-142-3807?

NSN 5120-00-142-3807 is a Puller,mechanical, manufactured by Telsmith Inc Div of Astec Industries Inc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-142-3807?

NSN 5120-00-142-3807 has 3 cross-referenced part numbers: 11-1257 (Unison Industries Llc), 11-1257 (Amphenol Corp Div Amphenol Aerospace Operations), 11-1257 (Telsmith Inc Div of Astec Industries Inc).

What NSN replaces 5120-00-142-3807?

There are 2 known substitutes for 5120-00-142-3807: 5920-00-557-2647, 5910-00-852-0272. Verify interchangeability with system specifications before substitution.

What are the specifications of 11-1257?

Key specifications for 11-1257: Spread Range: 1.500 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN; Reach Length: 3.250 INCHES NOMINAL IN; Style Designator: GEAR AND TERMINAL, TWO JAW, EXTERNAL. 3 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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