Hemingray.info
 
UD 3029
Micarta Core
  • ST-6000 Suspension String
    Complete ST-6000 Micarta Core suspension string showing how 5 of these sleeves were used together. Photo credit Shaun Kotlarsky of Hemingray.net.
  • CD 317.7/314/314
    These sleeves were originally believed to belong to CD 317.7 and so they were assigned CD 314. They have since lost their CD number designation. Photo credit Bill Meier of Insulators.info.
Insulator Facts

Dimensions:3 3⁄4" H × 7" W
Primary Embossing:The Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.")

Insulators with No Name or No Embossing are denoted as such.
 NO EMBOSSING
Years Produced: Unknown
Rarity Scale 0. No specimens known
1. Extremely Common (millions known)
2. Very Common
3. Common
4. Fairly Common
5. Uncommon
6. Very Uncommon
7. Rare (dozens known)
8. Very Rare (less than a dozen known)
9. Extremely Rare (2 or 3 known)
10. Unique (only one known)
 Rare (7/10)
Usage: Power (Suspension)
Hobby Nickname: Micarta Core
Weight:Weight is an average only (or as specified in original catalogs.) Weight may vary substantially depending on many factors, including amount of glass poured, depth of the threads, mold variations, added hardware such as brass or lead bushings, etc.
 39.0 oz.
Value Range: This is an estimated value range only, based on historical hobby collecting data. Insulator values vary widely depending on many factors, including embossing, color, condition, mold variations, manufacturing anomalies, and other attributes. Please visit the Hemingray Values page for more information.
 $100-10000
Insulator Overview

This glass sleeve was manufactured by Hemingray, and two of them were discovered in the 1960s by a Hemingray employee digging in the Hemingray dump. It was originally believed to have been a sleeve for the CD 317.7, and so it was assigned CD 314. Once it was discovered the pieces did not go together, the sleeve lost its CD number.

We now know that this sleeve is part of the Micarta Core suspension string, in which 5 of these sleeves were stacked and a core made of micarta was inserted through the middle. The complete set has been assigned the number ST-6000 by Shaun Kotlarsky of All Insulators.

Related Links:
Known Embossing
Primary EmbossingThe Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.")

Insulators with No Name or No Embossing are denoted as such.
EINThe Embossing Index Number (EIN) is a unique number assigned by the collecting hobby to each distinct embossing for an insulator design. It is normally shown in brackets, e.g. [050].
EmbossingMost common terms:
(F-Skirt): Front Skirt
(R-Skirt): Rear Skirt
/: New line of embossing
{}: Special note (not embossed on the insulator)
[#]: Represents a number

Other terms:
{MLOB}: Mold Line Over Base
(F-Crown): Front Crown
(R-Crown): Rear Crown
(F-Umbrella): Front Umbrella
(R-Umbrella): Rear Umbrella
BaseThe base is the bottom of the insulator. Hemingray made 4 different types of bases:

1. SDP: Sharp Drip Points
2. RDP: Round Drip Points
3. CB: Corrugated Base
4. SB: Smooth Base
Year AddedThis is the year that this embossing was officially recognized and added to the McDougald (1991-2008) or Briel (2011-2023) insulator price guides. It is not necessarily the year this embossing was discovered.
 Photo
Status✓ = In my collection

If the value in this column says WANTED, then that specific insulator is on my wanted list! If you have that insulator and would like to sell it, click on the WANTED link to submit photos and contact me.
NO EMBOSSING [010] [No embossing] {Hemingray product} SB - No Photo✓
Removed Embossing

The following embossing(s) were removed from the price guide because they could not be verified to exist, were consolidated with other embossings, or were otherwise ambiguous/inaccurate. They are preserved here for historical purposes.


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Primary EmbossingThe Primary Embossing is typically found on the front of the insulator and usually identifies either the manufacturer (such as "Hemingray") or the company that the insulator was made for (such as "AM.TEL.&TEL.CO.")

Insulators with No Name or No Embossing are denoted as such.
EINThe Embossing Index Number (EIN) is a unique number assigned by the collecting hobby to each distinct embossing for an insulator design. It is normally shown in brackets, e.g. [050].
EmbossingMost common terms:
(F-Skirt): Front Skirt
(R-Skirt): Rear Skirt
/: New line of embossing
{}: Special note (not embossed on the insulator)
[#]: Represents a number

Other terms:
{MLOB}: Mold Line Over Base
(F-Crown): Front Crown
(R-Crown): Rear Crown
(F-Umbrella): Front Umbrella
(R-Umbrella): Rear Umbrella
BaseThe base is the bottom of the insulator. Hemingray made 4 different types of bases:

1. SDP: Sharp Drip Points
2. RDP: Round Drip Points
3. CB: Corrugated Base
4. SB: Smooth Base
 Year Removed
n/a
Known Color
ColorThe color of the insulator.
Aqua