PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9903.1421Back Disc

Hannay Reels Inc · NSN 3040-01-515-3737 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-01-515-3737 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-515-3737. Primary manufacturer part number: 9903.1421.
Features
  • Back Disc — FSC 3040
  • Overall Diameter: 25.750 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Hannay Reels Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Back Disc, cataloged under National Stock Number 3040-01-515-3737, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Hannay Reels Inc. Government technical data includes 1 verified specification, 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3040-01-515-3737
Primary Part Number9903.1421
Item NameBack Disc
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerHannay Reels Inc
StatusACTIVE
Overall Diameter25.750 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5950-00-009-280214371 INTERCHANGEABLE
Transformer,power
Symetrics Industries, Llc Dba Extant Aerospace Div Symetrics Industries Dba Extant Aerospace
5935-00-229-732826-27 INTERCHANGEABLE
Connector,receptacle,electrical
Entron Industries Limited Partnership Dba Entron Industries Property Div
5905-00-463-93260816-0015 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
6635-00-621-7148605647 INTERCHANGEABLE
Contact Plate
Illinois Tool Works, Inc. Div Magnaflux
5315-00-759-47342627 INTERCHANGEABLE
Pin,quick Release
Avibank Mfg., Inc. Dba Avibank Manufacturing Inc
3020-00-769-54352627 INTERCHANGEABLE
Gear Cluster
L3harris Technologies, Inc. Div Space and Airborne Systems
5905-01-096-54722627 INTERCHANGEABLE
Resistor,fixed,wire Wound
Crown Audio, Inc. Dba Crown International
5325-01-239-78022627 INTERCHANGEABLE
Ring,retaining
Lebus International, Inc.
5325-01-397-08282627 INTERCHANGEABLE
Stud Assembly,turnlock Fastener
Knappco Corporation Dba Civacon
2940-01-444-06832627 INTERCHANGEABLE
Filter Element,intake Air Cleane
Napa Automotive Parts Co
Cross-Reference Index
Part NumberManufacturer
9903.1421 PRIMARY Hannay Reels Inc (USA)
26-27 Hannay Reels Inc (USA)
Related Parts
5950-00-009-2802INTERCHANGEABLE
TRANSFORMER,POWER
14371
5935-00-229-7328INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
26-27
5905-00-463-9326INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
0816-0015
6635-00-621-7148INTERCHANGEABLE
CONTACT PLATE
605647
5315-00-759-4734INTERCHANGEABLE
PIN,QUICK RELEASE
2627
3020-00-769-5435INTERCHANGEABLE
GEAR CLUSTER
2627
5905-01-096-5472INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
2627
5325-01-239-7802INTERCHANGEABLE
RING,RETAINING
2627
5325-01-397-0828INTERCHANGEABLE
STUD ASSEMBLY,TURNLOCK FASTENER
2627
2940-01-444-0683INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
2627
5950-01-699-0115INTERCHANGEABLE
TRANSFORMER,POWER

Frequently Asked Questions

What is NSN 3040-01-515-3737?

NSN 3040-01-515-3737 is a Back Disc, manufactured by Hannay Reels Inc, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-01-515-3737?

NSN 3040-01-515-3737 has 2 cross-referenced part numbers: 9903.1421 (Hannay Reels Inc), 26-27 (Hannay Reels Inc).

What NSN replaces 3040-01-515-3737?

There are 11 known substitutes for 3040-01-515-3737: 5950-00-009-2802, 5935-00-229-7328, 5905-00-463-9326 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9903.1421?

Key specifications for 9903.1421: Overall Diameter: 25.750 INCHES NOMINAL IN. 1 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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