PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

J1618Protector,guy

Joslyn Corp · NSN 4030-00-912-5520 · FSC 4030 · No Item Name Available
Verified by PartsTable
NSN 4030-00-912-5520 — this item is cataloged by the U.S. Government under National Stock Number 4030-00-912-5520. Primary manufacturer part number: J1618.
Features
  • Protector,guy — FSC 4030
  • Features Provided: CLAMP TYPE RING SHIELD
  • Mounting Facility: CLAMP
  • Accommodated Material Diameter: 0.750 INCHES MAXIMUM IN
  • Surface Treatment: ZINC
  • Material: STEEL
  • 1 verified cross-reference
  • Primary manufacturer: Joslyn Corp
Applications
  • Applications requiring Steel construction
General Description

The Protector,guy, cataloged under National Stock Number 4030-00-912-5520, is classified within Federal Supply Class 4030 (No Item Name Available) of the Rope, Cable, Chain, and Fittings group. The primary manufacturer of record is Joslyn Corp. Government technical data includes 5 verified specifications, 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4030-00-912-5520
Primary Part NumberJ1618
Item NameProtector,guy
FSC / FSG4030 / 40 — No Item Name Available
ManufacturerJoslyn Corp
StatusCANCELLED
Features ProvidedCLAMP TYPE RING SHIELD
Mounting FacilityCLAMP
Accommodated Material Diameter0.750 INCHES MAXIMUM IN
Surface TreatmentZINC
MaterialSTEEL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5985-01-205-2685 INTERCHANGEABLE
Coupler,antenna
5120-01-355-1707J1618A INTERCHANGEABLE
Wrench,open End
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
Cross-Reference Index
Part NumberManufacturer
J1618 PRIMARY Joslyn Corp (USA)
Related Parts
5985-01-205-2685INTERCHANGEABLE
COUPLER,ANTENNA
5120-01-355-1707INTERCHANGEABLE
WRENCH,OPEN END
J1618A

Frequently Asked Questions

What is NSN 4030-00-912-5520?

NSN 4030-00-912-5520 is a Protector,guy, manufactured by Joslyn Corp, classified under FSC 4030 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4030-00-912-5520?

NSN 4030-00-912-5520 has 1 cross-referenced part number: J1618 (Joslyn Corp).

What NSN replaces 4030-00-912-5520?

There are 2 known substitutes for 4030-00-912-5520: 5985-01-205-2685, 5120-01-355-1707. Verify interchangeability with system specifications before substitution.

What are the specifications of J1618?

Key specifications for J1618: Features Provided: CLAMP TYPE RING SHIELD; Mounting Facility: CLAMP; Special Features: 18 GAGE MATERIAL,TAPERED,O/A DIM. 3.875 IN. W AT BOTTOM TO 2.000 IN. W AT TOP IN; Overall Length: 96.000 INCHES NOMINAL IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4030-00-912-5520 still in active supply?

NSN 4030-00-912-5520 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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