Mutual Screw Socket Set Screws Size Chart printable pdf download

Alloy

Sockets

Socket Set Screws

Steel

- A

ASME B18.3-2003,

ocket

crewS

lloy

teel

Blue Devil

Shortest Nominal Length To Which Column T Applies

Tightening Torque

Nominal Size

(Inch-Lbs.)

Cup & Flat Point

Cone & Oval Point

Half Dog Point

Hex Key Size

0.13

.028

.86

0.13

0.19

0.13

.035

1.8

0.13

0.19

.035

1.8

0.19

.050

0.19

.050

0.19

1/16

9.5

0.19

0.25

0.19

1/16

9.5

0.19

0.25

5/64

19.4

0.19

0.25

3/32

33.5

1/4

0.25

0.31

1/8

77.9

5/16

0.31

0.44

0.38

5/32

156

3/8

0.38

0.44

3/16

273

7/16

0.44

0.63

0.50

7/32

428

1/2

0.50

0.63

1/4

615

5/8

0.63

0.88

5/16

1315

3/4

0.75

1.00

3/8

2150

7/8

0.88

1.00

1/2

5130

1.00

1.25

9/16

7010

Cup point: A headless screw threaded the entire length. It has a hexagonal drive at one end and a cup-shaped indentation at the other end.

Half-Dog point: A set screw with a protruding tip with a flat surface at the end opposite that of the hexagonal drive.

Description

Oval point: A set screw with an oval-shaped point at the end opposite that of the hexagonal drive.

Flat point: A set screw with a flat surface at the end opposite that of the hexagonal drive.

Cone point: A set screw with a sharp conical-shaped point at the opposite end from the hexagonal drive.

Cup point: The cup point is the most used style set screw. Designed for fast, permanent and semi-permanent location of parts on shafts with

hardness differential of 10-15 Rockwell C points and where cutting in of cup edge on the shaft is acceptable.

Half-Dog point: Intended for permanent setting. The point should fit closely to the diameter of the drilled hole or against the flat. Often used

instead of a dowel pin.

Oval point: Preferred style for frequent reset on soft or hard shafts with minimum deforming. Also chosen for permanent setting on shafts spotted,

Applications/

splined or grooved, and for applications where point meets shaft on an angle. Sometimes substituted for the cup point style.

Advantages

Flat point: Designed for frequent resetting or relocating on hard steel shafts and where minimal damage to shafts is necessary. Ground flats on the

shaft improves the contacts.

Cone point: For permanent setting on soft or hardened shafts. The deep penetration it offers gives this style set screw the highest tor-sional & axial

holding power. For shafts of Rockwell hardness C15 or over, spot point half its depth. Can also be used as a pivot or hanger.

When two set screws are used in a set screw collar, their holding power is determined by their location with respect to each other.

Screws shall be made from an alloy steel which conforms to the following chemical composition requirements (per product analysis)--

Carbon : 0.28 to 0.50%; Phosphorus : 0.040% maximum; Sulfur : 0.045% maximum. Also, one or more of the following elements shall be present in

Material

sufficient quantity to meet the strength requirements listed below: chromium, nickel, molybdenum or vanadium.

Screws shall be heat treated by oil quenching from above the transformation temperature and then tempered at a temperature sufficient to meet the

Heat Treatment

hardness requirements listed below.

Hardness

Rockwell C45 - 53

Socket set screws of a sufficient length to be tested (as listed in the above table) shall withstand application of the test torque specified in said table

Torsional Strength

without evidence of the socket reaming or the screw bursting.

Finish

Screws are supplied with a thermal black finish.

266

This page prints with a watermark