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Vintage Holo-Krome Thermo-Forged Socket Screw Selector Double Sided Slide Chart Tool
This is a vintage Holo-Krome Thermo-Forged Socket Screw Selector mechanical slide chart calculator.
This is a complete, double-sided reference tool used for determining dimensions, thread pitches, and strength data for standard industrial fasteners.
Front Side Features:
Covers the 1960 Series standards for National Coarse and Fine series socket head cap screws. Includes data for counterbore sizes, tap drill sizes, average yield strength, average tensile strength, and tightening torque.
It shows technical drawings for Socket Head Cap Screws, Flat Head Socket Cap Screws, and Button Head Socket Cap Screws.
Back Side Features:
Features technical reference tables and diagrams for Socket Set Screws, Socket Head Shoulder Screws, and Socket Pipe Plugs.
Includes data for threads per inch (UNC and UNF), socket/key sizes, point styles (cup, flat, half dog, cone, oval), shoulder lengths, and nominal sizes.
Details:
Manufacturer: The Holo-Krome Screw Corporation, Hartford 10, Connecticut
Material: Durable printed cardboard/plastic composite slider construction
Condition: Vintage pre-owned condition. The slide functions as intended. There is minor surface wear, edge rubbing, and light aging marks from shop use.
Please see all photos to evaluate the physical condition.
