ASME B18.6.3 Type 1A Cross Recessed 100 Deg Flat – Adfast Components

Home
About
Product
Product

Adfast Components offers precision-engineered hot and cold forged fasteners ranging from M3 to M100, ensuring superior strength and reliability. Designed to meet diverse industrial standards, our components guarantee durability and performance.

Precision Components

Pumps & Valves

Automobile

Customised

Electronic

Medical

Contract Manufacturing

3D Printing & Additive Manufacturing

Fastener

Bolts

Coated Fasteners

Washer

Stud Bolts

Nuts

Screws
Resources
Resources

Explore Adfast Components for precision-engineered fasteners, offering hot & cold forged solutions with metric sizes from M3 to M100 for diverse industrial needs.

materials

Carbon Steel

Alloy Steel

Stainless Steel

Super Alloys

Non Ferrous Metal & Alloys

High Performance Nickel Alloys

Copper Alloys

Technical

Specification

Standard

Weight

Applications

Threads
Contact

Home
About
Product
Product

Adfast Components offers precision-engineered hot and cold forged fasteners ranging from M3 to M100, ensuring superior strength and reliability. Designed to meet diverse industrial standards, our components guarantee durability and performance.

Precision Components

Pumps & Valves

Automobile

Customised

Electronic

Medical

Contract Manufacturing

3D Printing & Additive Manufacturing

Fastener

Bolts

Coated Fasteners

Washer

Stud Bolts

Nuts

Screws
Resources
Resources

Explore Adfast Components for precision-engineered fasteners, offering hot & cold forged solutions with metric sizes from M3 to M100 for diverse industrial needs.

materials

Carbon Steel

Alloy Steel

Stainless Steel

Super Alloys

Non Ferrous Metal & Alloys

High Performance Nickel Alloys

Copper Alloys

Technical

Specification

Standard

Weight

Applications

Threads
Contact

ASME B18.6.3 Type 1A Cross Recessed 100 Deg Flat

Dimensions of ASME B18.6.3 Type 1A Cross Recessed 100 Deg Flat Countersunk Head Machine Screws

Nominal Size or Baic Screw Diameter	Head Diameter, A		Head Height, H, Ref.	Recess Diameter, M, Ref.	Recess Depth, T, Ref.	Recess Width, N, Ref.	Driver Size	Recess Penetration Gaging Depth		Protrusion Above Gaging Diameter, F		Gaging Diameter, G
Nominal Size or Baic Screw Diameter	Max	Min	Head Height, H, Ref.	Recess Diameter, M, Ref.	Recess Depth, T, Ref.	Recess Width, N, Ref.	Driver Size	Max	Min	Max	Min	Gaging Diameter, G
0	0.112	0.095	0.026	0.054	0.028	0.018	0	0.029	0.013	0.020	0.012	0.074
1	0.137	0.118	0.031	0.062	0.036	0.018	0	0.037	0.021	0.021	0.013	0.098
2	0.162	0.142	0.037	0.088	0.048	0.028	1	0.046	0.030	0.022	0.014	0.121
3	0.187	0.165	0.043	0.096	0.055	0.029	1	0.053	0.037	0.024	0.015	0.144
4	0.212	0.188	0.049	0.110	0.070	0.029	1	0.068	0.052	0.025	0.016	0.167
6	0.262	0.235	0.060	0.148	0.077	0.041	2	0.071	0.053	0.028	0.017	0.214
8	0.312	0.282	0.072	0.162	0.092	0.041	2	0.086	0.068	0.031	0.019	0.261
10	0.362	0.329	0.083	0.178	0.107	0.041	2	0.101	0.083	0.034	0.021	0.307
1/4	0.477	0.437	0.110	0.240	0.126	0.056	3	0.114	0.096	0.040	0.025	0.415
5/16	0.597	0.550	0.138	0.310	0.163	0.085	4	0.145	0.127	0.047	0.030	0.526
3/8	0.717	0.662	0.165	0.336	0.187	0.085	4	0.170	0.152	0.053	0.034	0.638

Note :

Where specifying nominal size in decimals, zeros preceding the decimals and in the fourth decimal place shall be omitted.
Tabulated values determined from formula for maximum H in Appendix A.
No tolerance for gaging diameter is given. If the gaging diameter of the gage used differs from tabulated value, the protrusion will be affected accordingly and the proper protusion values must be recalculated using the formulas.