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Socket Set Screw

ASTM F912 Hex Socket Set Screws are a headless fastener threaded its entire length (except for the point) used commonly for fastening mated parts such as a shaft and collar. The F912 specification covers the requirements for quenched and tempered alloy steel socket set screws. Dimensional specifications are governed by ASME B18.3. These set screws are intended for compression applications only and are not customarily subjected to embrittlement tests. The socket set screw's headless design allows the fastener to sit flush, or inset, into the threaded part.

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Governing Standards
Mechanical Properties
Chemical Properties
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsAlloy Steel Socket Set Screw

Per ASME B18.3-2012
Size	Nominal	UNC	UNF	J		T	C		Oval Point Radius	Cone Point Angles
				Hex Socket Size		Key Engagement	Cup & Flat Point Diameters		Oval Point Radius	Cone Point Angles
				Fraction Nominal	Decimal Nominal	Min	Max	Min	Basic	90 Deg Lengths
#0	0.0600		80	….	0.0280	0.0500	0.0330	0.0270	0.0450	0.0900
#1	0.0730	64	72	….	0.0350	0.0600	0.0400	0.0330	0.0550	0.0900
#2	0.0860	56	64	….	0.0350	0.0600	0.0470	0.0390	0.0640	0.1300
#3	0.0990	48	56	….	0.0500	0.0700	0.0540	0.0445	0.0740	0.1300
#4	0.1120	40	48	….	0.0500	0.0700	0.0610	0.0510	0.0840	0.1900
#5	0.1250	40	44	1/8	0.0620	0.0800	0.0670	0.0570	0.0940	0.1900
#6	0.1380	32	40	1/8	0.0620	0.0800	0.0740	0.0640	0.1040	0.1900
#8	0.1640	32	36	5/64	0.0780	0.0900	0.0870	0.0760	0.1230	0.2500
#10	0.1900	24	32	3/32	0.0940	0.1000	0.1020	0.0880	0.1420	0.2500
1/4	0.2500	20	28	1/8	0.1250	0.1250	0.1320	0.0118	0.1880	0.3100
5/16	0.3125	18	24	5/32	0.1560	0.1560	0.1720	0.1560	0.2340	0.3800
3/8	0.3750	16	24	3/16	0.1880	0.1880	0.2120	0.1940	0.2810	0.4400
7/16	0.4375	14	20	7/32	0.2190	0.2190	0.2520	0.2320	0.3280	0.5000
1/2	0.5000	13	20	1/4	0.2500	0.2500	0.2910	0.2700	0.3750	0.5700
5/8	0.6250	11	18	5/16	0.3120	0.3120	0.3710	0.3470	0.4690	0.7500
3/4	0.7500	10	16	3/8	0.3750	0.3750	0.4500	0.4250	0.5620	0.8800
7/8	0.8750	9	14	1/2	0.5000	0.5000	0.5300	0.5020	0.6560	1.0000
1	1.0000	8	14	9/16	0.5620	0.5620	0.6090	0.5790	0.7500	1.1300
1 1/8	1.1250	7	12	9/16	0.5620	0.5620	0.6890	0.6550	0.8440	1.2500
1 1/4	1.2500	7	12	5/8	0.6250	0.6250	0.7670	0.7330	0.9380	1.5000
1 3/8	1.3750	7	12	5/8	0.6250	0.6250	0.8480	0.8080	1.0310	1.6300
1 1/2	1.5000	6	12	3/4	0.7500	0.7500	0.9260	0.8860	1.1250	1.7500
1 3/4	1.7500	5	12	1	1.0000	1.0000	1.0890	1.0390	1.3120	2.0000
2	2.0000	4	12	1	1.0000	1.0000	1.2440	1.1930	1.5000	2.2500

All dimensions are in inches.

Socket Set Screw

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Diameter Length Item # Availability Price Quantity UOM

7/8

SSSA0870087

In Stock

$6.04761/EA

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7/8-9 X 7/8 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT

$6.04761/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$6.04761/EA
140	$5.73233/EA
530	$5.21025/EA
2360	$3.5455/EA

7/8

SSSA0870100

In Stock

$3.62946/EA

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7/8-9 X 1 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT

$3.62946/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$3.62946/EA
110	$3.44025/EA
430	$3.12692/EA
1910	$2.12783/EA

7/8

1 1/2

SSSA0870150

In Stock

$5.53454/EA

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7/8-9 X 1 1/2 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT

$5.53454/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$5.53454/EA
70	$5.24601/EA
250	$4.76822/EA
1110	$3.2447/EA

7/8

SSSA0870200

In Stock

$9.1565/EA

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7/8-9 X 2 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT

$9.1565/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$9.1565/EA
50	$8.67915/EA
180	$7.88868/EA
780	$5.36813/EA

ASTM F912	This specification covers the requirements for quenched and tempered alloy steel socket-set screws (SSS) in nominal diameters 0.060 through 2 in. having hardnesses 45 to 53 HRC.
ASME B18.3	Covers the complete general and dimensional data for various types of hexagon socket cap screws, shoulder screws, set screws, and hexagon keys recognized as an American National Standard.
ASME B1.1 UNC & UNF Class 2A	Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

Per ASTM F912-11
Alloy Steel, Quenched & Tempered	Rockwell Hardness Limits
	45 to 53 HRC

Per ASTM F912-11
Heat Analysis			Product Analysis
Carbon	Phosphorus	Sulfur	Carbon	Phosphorus	Sulfur
% by weight	% by weight	% by weight	% by weight	% by weight	% by weight
0.30 to 0.48	0.035	0.040	0.28 to 0.50	0.04	0.045

Socket Set Screw

Technical Data

Governing Standards

Governing StandardsAlloy Steel Socket Set Screw

Mechanical Properties

Mechanical PropertiesAlloy Steel Socket Set Screw

Chemical Properties

Chemical PropertiesAlloy Steel Socket Set Screw

Dimensional Specifications

Dimensional SpecificationsAlloy Steel Socket Set Screw

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7/8-9 X 7/8 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT

7/8-9 X 1 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT

7/8-9 X 1 1/2 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT

7/8-9 X 2 F912 ALLOY STEEL SOCKET SET SCREW CUP POINT