Screws and Bolts

FLAT HEAD CAP SCREW

This
fastener is a
quality, close
tolerance product
with dimensions conforming to USASI B18.6.2. Made of
Grade 2 steel, it provides a tensile strength of 74,000 psi.
The flat countersunk head has an accurately milled slot for
holding or tightening with screwdriver.
Available from stock in diameters from 1/2 through 3/4
inches; lengths from 1 through 3 inches. Coarse threads.
Note: length of flat head cap screws is measured from the
largest diameter of the bearing surface of the head to the
extreme point, in a line parallel to the axis of the screw.

GRADE 2 HEX CAP SCREW

Most
commonly used
type, made to meet
SAE Grade 2 specifications, and offering tensile-strength of
74,000 psi to 60,000 psi depending on size. Used in tapped
hole, or with nut. Available from stock in diameters from
1/4 inch to 2 inches; lengths from 1/2 inch to 8 inches. Bright
finish is standard; also finished to specification, in zinc or
cadmium plate; phosphate coated; galvanized. Copper, nickel,
chromium plated on a special basis. Threads are UNC-2A and
UNF-2A to a standard length of twice the diameter plus 1/4
inch for screws through 6 inches long; plus 1/2 inch for
screws over 6 inches. Other materials in production runs.

ELEVATOR BOLTS

Large,
flattened thin head
requires minimum
clearance and
provides for an
unobstructed
surface in yielding
materials such as wood, leather, rubber belting etc. UNC-2A
threads. Sizes: 1/4, 5/16, 3/8-inch diameters; 3/4 through 3-
inch lengths.

GRADE 5 HEX CAP SCREW

High strength heat treated fastener
with tensile strength of 120,000 psi to 105,000 psi depending on size. Identified by 3 radial dashes on head. Used in tapped hole or with nut. Stocked in diameters from 1/4 inch to 1 inch; lengths from 1/2 inch to 12 inches. UNC-2A and UNF- 2A threads. Black finish; other finishes to specification as above. High strength of this product provides stronger joints that stay tight when torqued to recommended pre-load.

GRADE 8 HEX CAP SCREW

High strength, heat treated alloy
fastener offering tensile strength of 150,000 psi. Identified by six radial dashes on head. Black finish; other finishes to specification. UNC-2A and UNF-2A threads. Diameters from 1/4 inch to 1-1/2 inch; lengths from 1/2 inch to 8 inches.

A325 HEAVY HEX STRUCTURAL BOLT

Has tensile
strength of 120,000
psi to 105,000 psi depending on size. Conforms to ASTM
A325 specification for structural steel fasteners. Head is
larger across the flats than the Hex Cap Screw dimensions.
Permits washers to be eliminated and same size wrench for
nut and bolt. Has shorter thread length, too, to exclude
threads from shear planes in structural joints. Black finish;
available galvanized to order. Developed for use in steel
frame buildings, bridges, large equipment. Diameters from
5/8 inch to 1-1/4 inch; lengths from 1-1/2 inch to 8-1/2
inches. Coarse thread only.

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