PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B&L BLOCK CO.FIG # 4241Pulley,groove

Apex Tool Group, Llc · NSN 3020-00-927-1617 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-927-1617 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-927-1617. Primary manufacturer part number: B&L BLOCK CO.FIG # 4241.
Features
  • Pulley,groove — FSC 3020
  • Integral Cooling Vane: NOT INCLUDED
  • Groove Shape: U
  • Counterbore Feature: NOT INCLUDED
  • Bearings: INCLUDED
  • Bearing Quantity: 1
  • Face Width: 1.000 INCHES NOMINAL IN
  • Bore Type: STRAIGHT
Applications
  • Applications requiring Steel Overall construction
General Description

The Pulley,groove, cataloged under National Stock Number 3020-00-927-1617, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Apex Tool Group, Llc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 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
NSN3020-00-927-1617
Primary Part NumberB&L BLOCK CO.FIG # 4241
Item NamePulley,groove
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerApex Tool Group, Llc
StatusACTIVE
Integral Cooling VaneNOT INCLUDED
Groove ShapeU
Counterbore FeatureNOT INCLUDED
BearingsINCLUDED
Bearing Quantity1
Face Width1.000 INCHES NOMINAL IN
Bore TypeSTRAIGHT
Design FormPLAIN
Groove Quantity1
Bore FeatureINCLUDED
MaterialSTEEL OVERALL
Shaft Size for Which Designed1.125 INCHES NOMINAL IN
Lightening HoleNOT INCLUDED
Bearing TypeSLEEVE
Style DesignatorPLAIN
Distance From Outside Flange/rim to Hub End and Location0.031 INCHES NOMINAL BOTH ENDS IN
Split Hub FeatureNOT INCLUDED
Protruding Hub CharacteristicPLAIN
Surface TreatmentZINC
Outside Diameter10.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5975-00-042-71384241 INTERCHANGEABLE
Box Connector,electrical
Abb Installation Products Inc
5999-00-259-5098101002XX INTERCHANGEABLE
Clip,electrical
Littelfuse, Inc.
4820-00-554-8715424-1 INTERCHANGEABLE
Valve,gate
Crane Co Div Valve Div
6630-01-233-7594 INTERCHANGEABLE
Capillary Centrifugal Hematology
6220-01-245-4278 INTERCHANGEABLE
Light,warning
6625-01-591-41534241 INTERCHANGEABLE
Wattmeter
Boonton Electronics Corporation Div Boonton Electronics
4460-01-633-29704241 INTERCHANGEABLE
Filter Unit,air Purification Sys
Air Liquide America L.p.
Cross-Reference Index
Part NumberManufacturer
B&L BLOCK CO.FIG # 4241 Apex Tool Group, Llc (USA)
4195578 Amz Alabama Inc. (USA)
4241 Brewer-Titchner Corp Sub Joslyn Mfg and Supply Co (USA)
322641-1 Naval Air Warfare Center Aircraft Division Joint Base Jbmdl (USA)
145-451094KK17 Rohr, Inc. Dba Rohr Industries Inc Div Rohr Inc., a Part of Collins Aerospace (USA)
4195578 Fnss Savunma Sistemleri Anonim Sirketi (TUR)
4195578 Bae Systems Land & Armaments L.p. (USA)
B&L BLOCK CO.FIG # 4241 Apex Tool Group (USA)
145-451092MM15 Rohr, Inc. Dba Rohr Industries Inc Div Rohr Inc., a Part of Collins Aerospace (USA)
Related Parts
5975-00-042-7138INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
4241
5999-00-259-5098INTERCHANGEABLE
CLIP,ELECTRICAL
101002XX
4820-00-554-8715INTERCHANGEABLE
VALVE,GATE
424-1
6630-01-233-7594INTERCHANGEABLE
CAPILLARY CENTRIFUGAL HEMATOLOGY
6220-01-245-4278INTERCHANGEABLE
LIGHT,WARNING
6625-01-591-4153INTERCHANGEABLE
WATTMETER
4241
4460-01-633-2970INTERCHANGEABLE
FILTER UNIT,AIR PURIFICATION SYS
4241

Frequently Asked Questions

What is NSN 3020-00-927-1617?

NSN 3020-00-927-1617 is a Pulley,groove, manufactured by Apex Tool Group, Llc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-927-1617?

NSN 3020-00-927-1617 has 9 cross-referenced part numbers: B&L BLOCK CO.FIG # 4241 (Apex Tool Group, Llc), 4195578 (Amz Alabama Inc.), 4241 (Brewer-Titchner Corp Sub Joslyn Mfg and Supply Co), 322641-1 (Naval Air Warfare Center Aircraft Division Joint Base Jbmdl), 145-451094KK17 (Rohr, Inc. Dba Rohr Industries Inc Div Rohr Inc., a Part of Collins Aerospace) and 4 more.

What NSN replaces 3020-00-927-1617?

There are 7 known substitutes for 3020-00-927-1617: 5975-00-042-7138, 5999-00-259-5098, 4820-00-554-8715 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B&L BLOCK CO.FIG # 4241?

Key specifications for B&L BLOCK CO.FIG # 4241: Integral Cooling Vane: NOT INCLUDED; Groove Shape: U; Overall Length: 1.062 INCHES NOMINAL IN; Counterbore Feature: NOT INCLUDED. 22 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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