3/8" Heavy Duty Single Hex Impact Sockets

The 3/8" Heavy Duty Single Hex Impact Socket from Griphold Engineering Private Limited is built from chrome vanadium steel designated EN-47, a British-standard grade with 0.45-0.55% carbon and chromium content around 0.90-1.20%, offering hardness after heat treatment in the 54-58 HRC range. The 3/8" square drive conforms to ASME standard drive dimensions, with a single hex (six-point) broach designed to grip fastener flats rather than corners. The socket is intended for impact wrench use, absorbing peak torque loads from pneumatic or cordless impact drivers rather than manual ratchet operation.

EN-47 chrome vanadium steel is a common choice for impact sockets in the Indian and export tool market, balancing toughness against brittle fracture better than plain carbon steel. The single hex geometry, as opposed to double hex (twelve-point), provides greater wall thickness and reduced risk of rounding on hexagonal fasteners. Standard manufacturing practice for this class includes induction hardening of the drive square and socket walls, with a black oxide or manganese phosphate conversion coating for corrosion resistance rather than decorative chrome plating, which can flake under impact shock. Wall thickness, overall socket length, and broach depth vary by metric or imperial size within the set.

Automotive repair workshops, heavy equipment maintenance depots, and assembly plants are the primary buyers, often purchasing complete sets from 8 mm to 24 mm or fractional inch equivalents for fleet tool cribs. The sockets ship in individual pouches, plastic rails, or steel cases depending on set configuration. The listing does not state specific socket sizes included, point dimensions, hardness test certificates, or torque test values. Buyers should request a dimensional table and material certificate before committing to bulk orders.

Griphold Engineering Private Limited operates from 309, Sanket Avenue, opposite Ambe Vidyalaya, Sama-savli Road, Vadodara 390024, Gujarat, India. The company holds a "harbor" trust tier, indicating basic marketplace verification without premium or advanced status. Its response metrics show a 0.00% response rate and zero recorded average response hours, which may reflect a recently registered account, limited staffing for inquiry management, or incomplete platform integration rather than active trading history.

The profile provides no information on year of establishment, number of employees, production capacity, in-house forging and heat-treatment capabilities, or major domestic or export clients. Claims of ISO and SGS certification appear in the source description but lack certificate numbers, dates, or scope details. Buyers should treat these as unverified assertions and request documentary proof. The company's address in Vadodara places it within Gujarat's established engineering manufacturing belt, but proximity to other toolmakers does not confirm its own production credentials.