thumbscrew

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Related to Thumb screws: jack screws

thumbscrew

1. an instrument of torture that pinches or crushes the thumbs
2. a screw with projections on its head enabling it to be turned by the thumb and forefinger

thumbscrew

[′thəm‚skrü]
(design engineering)
A screw with a head flattened in the same axis as the shaft so that it can be gripped and turned by the thumb and forefinger.

thumbscrew

A screw having a broad head that is knurled or flattened so that it may be turned easily by the thumb and one finger.
References in periodicals archive ?
The base of the thumb screws should always remain in contact with the mounting plate.
The thumb screws incorporate easy-grasp, easy-turn diamond knurled heads and are available in stainless steel, steel, and a variety of other materials, finishes, and styles.
We won't get the thumb screws out, that's not how we operate.
The things are a cross between a chastity belt and thumb screws, and about as comfortable as stuffing size five feet in size three shoes.
As I served my children their rice pops and toast, I could almost hear the thumb screws being applied to the hapless Mr Carter, who will probably be three inches taller next time he appears in public.
Indeed, had the impressive Kayode Odejayi scored after rounding Shay Given instead of losing all composure and blasting wildly over, Newcastle would have been in for thumb screws and the rack in the last quarter of an hour.
But when the ConDems heard that Labour's former director of communications Alastair Campbell was to appear, they tried to turn the thumb screws on the Beeb.
Someone from the Gestapo, aka the Fees Office, comes round and threatens them with the thumb screws if they don't claim to the max.
I know she's grieving, but it's not fair for her to apply emotional thumb screws.
She's wrong to try to use the emotional thumb screws on you.