Harsh Enterprises

Square Head Bolts are similar to Hex Cap screws but have a 4-sided square head instead of a 6-sided hexagonal head. They are commonly referred to as both bolts and screws and are designed to be driven with a wrench. Square Head Bolts are partially threaded with a shoulder beneath the head.

SPECIFICATIONS (CHEMICAL & MECHANICAL )

• METRIC -
  ASME B18.2.1, ASTM A307

Flange bolts have hexagonal heads, designed to be driven by a wrench. The unique characteristic of a flange bolt is the design of the head, from which they get their name. The "flange" of the bolt is a built in (integral) washer. In Imperial sizes, this washer is serrated to act as a lock washer.
Flange bolts are available in both full thread and partial thread varieties. The threading depends upon the lengths of the bolt. Partially threaded flange bolts have a shoulder, and fully threaded flange bolts are threaded to the underside of the flanged head.

SPECIFICATIONS (CHEMICAL & MECHANICAL )

• METRIC -
  ISO 898 PART 2

Either of two screws (both right-handed and turning together in the same direction or one right-handed and the other left-handed and turning oppositeways) by which an object which they adjust or restrain may be moved in one direction or the other by the motion of one. A common use is to allow the head of a countersunk bolt, screw or rivet, when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counter bore makes a flat-bottomed hole that might be used with a socket-head caps crew).

SPECIFICATIONS (CHEMICAL & MECHANICAL )

• METRIC -
  IS 1367 PART 3

Slotted Csk head screws from TUFF Fasteners require its hole of insertion to be pre-drilled.

SPECIFICATIONS (CHEMICAL & MECHANICAL )

• METRIC -
  ISO 898 PART 1

Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key). Stainless steel 18-8

SPECIFICATIONS (CHEMICAL & MECHANICAL )

• METRIC -
  IS 1367 PART 3

A stud is a threaded rod, it is threaded on both ends, the thread may extend along complete length of rod.

SPECIFICATIONS (CHEMICAL & MECHANICAL )

• METRIC -
  ASTM A193 ASTM A307 ASTM A320, JIS B 1186
• INCHES -
  ASTM A193 ASTM A307 ASTM A320, JIS B 1186