PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3903T42Line,halyard

Mcmaster-Carr Supply Co · NSN 4020-01-258-0299 · FSC 4020 · No Item Name Available
Verified by PartsTable
NSN 4020-01-258-0299 — this item is cataloged by the U.S. Government under National Stock Number 4020-01-258-0299. Primary manufacturer part number: 3903T42.
Features
  • Line,halyard — FSC 4020
  • General Characteristics Item Description: CONSIST OF 3 STRAND NYLON ROPE IAW MIL-R17343D; 40 FT. LG; 3/4 IN. CIR SPLICED W/BRASS SNAP HOOK, SWIVEL, CAGEC 39428, P/N 3903T42 ONE END AND STAINLESS STAAL RING, WELDED 3/16 IN. X 1 IN. CAGEC 39428, P/N 3779T81 OTHER END IN
  • 5 verified cross-references
  • Primary manufacturer: Mcmaster-Carr Supply Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Line,halyard, cataloged under National Stock Number 4020-01-258-0299, is classified within Federal Supply Class 4020 (No Item Name Available) of the Rope, Cable, Chain, and Fittings group. The primary manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4020-01-258-0299
Primary Part Number3903T42
Item NameLine,halyard
FSC / FSG4020 / 40 — No Item Name Available
ManufacturerMcmaster-Carr Supply Co
StatusACTIVE
General Characteristics Item DescriptionCONSIST OF 3 STRAND NYLON ROPE IAW MIL-R17343D; 40 FT. LG; 3/4 IN. CIR SPLICED W/BRASS SNAP HOOK, SWIVEL, CAGEC 39428, P/N 3903T42 ONE END AND STAINLESS STAAL RING, WELDED 3/16 IN. X 1 IN. CAGEC 39428, P/N 3779T81 OTHER END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5905-00-279-86400052 INTERCHANGEABLE
Resistor,fixed,wire Wound
Dietzgen Corp
4020-00-741-3154 INTERCHANGEABLE
Rope,fibrous
5961-00-822-0188SD92 INTERCHANGEABLE
Semiconductor Device,diode
Infineon Technologies Americas Corp
Cross-Reference Index
Part NumberManufacturer
3903T42 Mcmaster-Carr Supply Co (USA)
0052 Naval Facilities Engineering Command (USA)
MIL-R-17343 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-17343 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-17343, .75" CIR Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5905-00-279-8640INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
0052
4020-00-741-3154INTERCHANGEABLE
ROPE,FIBROUS
5961-00-822-0188INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
SD92

Frequently Asked Questions

What is NSN 4020-01-258-0299?

NSN 4020-01-258-0299 is a Line,halyard, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4020 (No Item Name Available). Status: active.

What are the part numbers for NSN 4020-01-258-0299?

NSN 4020-01-258-0299 has 5 cross-referenced part numbers: 3903T42 (Mcmaster-Carr Supply Co), 0052 (Naval Facilities Engineering Command), MIL-R-17343 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-17343 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-17343, .75" CIR (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4020-01-258-0299?

There are 3 known substitutes for 4020-01-258-0299: 5905-00-279-8640, 4020-00-741-3154, 5961-00-822-0188. Verify interchangeability with system specifications before substitution.

What are the specifications of 3903T42?

Key specifications for 3903T42: General Characteristics Item Description: CONSIST OF 3 STRAND NYLON ROPE IAW MIL-R17343D; 40 FT. LG; 3/4 IN. CIR SPLICED W/BRASS SNAP HOOK, SWIVEL, CAGEC 39428, P/N 3903T42 ONE END AND STAINLESS STAAL RING, WELDED 3/16 IN. X 1 IN. CAGEC 39428, P/N 3779T81 OTHER END 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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