Button Socket Cap Screws | Cap Screws | Nickel Systems

Button Socket Cap Screws

Button socket cap screws are favored not only for their practicality but also for their aesthetic appeal, making them ideal for use when the screw head is visible outside the assembly. Additionally, they are selected when clearance is restricted, and a socket drive is necessary. However, it’s important to note that due to their sleek design, button sockets may not handle as much stress as socket head cap screws, as their heads are comparatively smaller.

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Specifications & Technical Data

Dimensions


Nominal Size	A		H		S	J	T	F		L	Tensile Test Load	Single Shear Strength of Body	Seating Torques in./lbs.
	Head Diameter		Head Height		Head Side Height	Hex Socket Size	Key Engagement	Fillet Transition Diameter		Max Standard Length	Tensile Test Load	Single Shear Strength of Body	Seating Torques in./lbs.
	Max	Min	Max	Min	Ref	Nom	Min	Max	Min	Nom	Lb.	Lbs., Min.	Coarse Thread	Fine Thread
4	0.213	0.201	0.059	0.051	0.015	1/16	0.035	0.132	0.122	0.50	840	950	7.0	8.
6	0.262	0.250	0.073	0.063	0.015	5/64	0.044	0.158	0.148	0.63	1,260	1,400	13.	15.
8	0.312	0.298	0.087	0.077	0.015	3/32	0.052	0.194	0.184	0.75	1,940	2,000	25.	26.
10	0.361	0.347	0.101	0.091	0.020	1/8	0.070	0.220	0.210	1.00	2,440	2,700	45.	48.
1/4	0.437	0.419	0.132	0.122	0.031	5/32	0.087	0.290	0.280	1.00	4,430	4,700	95.	110.
5/16	0.547	0.527	0.166	0.152	0.031	3/16	0.105	0.353	0.343	1.00	7,300	7,300	190.	210.
3/8	0.656	0.636	0.199	0.185	0.031	7/32	0.122	0.415	0.405	1.25	10,800	10,600	300.	300.
1/2	0.875	0.851	0.265	0.245	0.046	5/16	0.175	0.560	0.540	2.00	19,800	18,800	900.	960.
5/8	1.000	0.970	0.331	0.311	0.062	3/8	0.210	0.685	0.665	2.00	31,500	29,400	1,700.	1,900.

Button Socket Cap Screw Specifications

Standard (ASME/ANSI)
- ASME B18.3-1998
Metric (IFI)

Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

Air Pollution Control

Chemical Processing

Electronics & Semi-conductors

Power Generation

Water Systems

Pulp & Paper Mills

Oil & Gas

Pumps & Seals

Aerospace

Valves

Glass Manufacturing

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