Click Specification

82° Flat Coutersunk Trim Head Screws [Table 13] (ASTM F837 / F468)

ASME B 18.6.3 (T13) - 2013

Display drawing:

Download CAD Model

Thread Size
d

4#
(3)

5#
(4)

6#
(4)

6#
(5)

8#
(5)

8#
(6)

10#
(8)

12#
(8)

12#
(10)

1/4
(10)

1/4
(12)

5/16
(12)

5/16
(1/4)

3/8
(5/16)

Code	Head Size
d	Nominal Size
PP
d_s	max
	min
d_k	max
	min
k	Ref
L₁	min
α	max
	min
Socket No.
M₁	Ref.
M₂	Ref.
P	Type I	max
		min
	Type IA	max
		min

3	4	4	5	5	6	8	8	10	10	12	12	1/4	5/16
0.1120	0.1250	0.1380	0.1380	0.1640	0.1640	0.1900	0.2160	0.2160	0.2500	0.2500	0.3125	0.3125	0.3750
40	40	32	32	32	32	24	24	24	20	20	18	18	16
0.112	0.125	0.138	0.138	0.164	0.164	0.190	0.216	0.216	0.250	0.250	0.312	0.312	0.375
0.106	0.119	0.131	0.131	0.157	0.157	0.181	0.207	0.207	0.240	0.240	0.302	0.302	0.364
0.187	0.212	0.212	0.237	0.237	0.262	0.312	0.312	0.362	0.362	0.412	0.412	0.477	0.597
0.167	0.191	0.191	0.215	0.215	0.238	0.285	0.285	0.333	0.333	0.380	0.380	0.442	0.556
0.052	0.060	0.052	0.068	0.052	0.069	0.085	0.069	0.101	0.080	0.112	0.075	0.116	0.155
0.062	0.062	0.062	0.062	0.062	0.062	0.062	0.062	0.062	0.062	0.062	0.062	0.062	0.062
82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°
80°	80°	80°	80°	80°	80°	80°	80°	80°	80°	80°	80°	80°	80°
1	1	1	2	2	2	2	2	2	2	3	3	3	4
0.100	0.122	0.122	0.148	0.158	0.176	0.182	0.192	0.198	0.198	0.262	0.262	0.276	0.358
0.100	0.122	0.122	0.148	0.158	0.176	0.182	0.192	0.198	0.198	0.262	0.262	0.276	0.358
0.061	0.082	0.082	0.075	0.085	0.103	0.110	0.120	0.125	0.125	0.139	0.139	0.154	0.196
0.045	0.066	0.066	0.052	0.062	0.080	0.087	0.097	0.102	0.102	0.116	0.116	0.131	0.174
0.058	0.079	0.079	0.071	0.081	0.099	0.107	0.117	0.122	0.122	0.136	0.136	0.151	0.193
0.042	0.063	0.063	0.053	0.063	0.081	0.089	0.099	0.104	0.104	0.118	0.118	0.133	0.175

①,Edge of head may be rounded or flat.
②,Short machine screws include nominal lengths up to and including 1 1/8 in. for sizes No.5 and smaller, and 2 in. for sizes No.6 and larger.
③,Machine Screw Length of Thread

1) Sizes No.5 and smaller.

Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 1-1/8 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall, unless otherwise specified, have a minimum length of full-form thread of 1 in.

2) Sizes No.6 and smaller.

Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 2 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall have a minimum length of full-form thread of 1.5 in. unless otherwise specified.
⑤,Machine Screw Length of Thread

1) Sizes No.5 and smaller.

Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 1-1/8 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall, unless otherwise specified, have a minimum length of full-form thread of 1 in.

2) Sizes No.6 and smaller.

Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 2 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall have a minimum length of full-form thread of 1.5 in. unless otherwise specified.

Alternative history

ASME B 18.6.3T13 - 2013 ASME B 18.6.3H4A - 2024

Send Inquiry

Similar Standards

1	[DIN] DIN 965 - 1990	Cross Recessed Countersunk Head Screws View Suppliers
2	[DIN EN ISO] DIN EN ISO 7046-1 - 2011	Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess - Product Grade A - Part 1: Steel Screws of Property Class 4.8 View Suppliers
3	[ISO] ISO 7046-2 - 1990	Cross Recessed Countersunk Flat Head Screws (Common Head Style) - Grade A - Steel of Property Class 8.8, stainless Steel and Nonferrous Metals View Suppliers
4	[DIN EN ISO] DIN EN ISO 7046-2 - 2011	Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess - Product Grade A - property Class 8.8 View Suppliers
5	[ISO] ISO 7046 (-2) - 2011	Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess - Product Grade A - Property Class 8.8 View Suppliers
6	[GB] GB /T 13806.1 (B) - 1992	Cross Recessed Countersunk Screws for Fine Mechanics View Suppliers
7	[GB] GB /T 819.1 - 2016	Countersunk Flat Head Screws (Common Head Style) with Cross Recess - Part 1: Property Class 4.8 View Suppliers
8	[GB] GB /T 819.1 - 2000	Countersunk Flat Head Screws (Common Head Style) with Cross Recess - Part 1: Property Class 4.8 View Suppliers
9	[GB] GB 819 - 1985	Cross Recessed Countersunk Head Screws View Suppliers
10	[GB] GB 819 - 1976	Cross Recessed Countersunk Head Screws View Suppliers
11	[EN] EN 2940 - 1995	Aerospace Series - Screws, 100° Countersunk Head, Offset Cruciform Recess, Threaded To Head, in Heat Resisting Steel Fe-pa92ht (A286), Silver Plated - Classification: 900 Mpa (At Ambient Temperature)/650℃
12	[ASME] ASME B 18.6.3 (H1F-I/H1F-IA) - 2024	Close Tolerance 100-deg Flat Countersunk Head Screws [TABLE 2.2.1-6 I/IA]
13	[ASME] ASME B 18.6.3 (H1B-I/H1B-IA) - 2024	82° Cross Recessed Countersunk Head Screws (ASTM F837/F468) [TABLE 2.2.1-2 I/IA]
14	[ASME] ASME B 18.6.3 (T2-I/T2-IA) - 2013	82° Cross Recessed Countersunk Head Screws [Table 2] (ASTM F837, F468)
15	[ASME] ASME B 18.6.3 (T6-I/T6-IA) - 2013	Close Tolerance 100-deg Flat Countersunk Head Screws (Machine Screws Only)
16	[ASME/ANSI] ASME/ANSI B 18.6.3 - 2010	Cross Recessed Countersunk Head Screws
17	[ASME] ASME B 18.6.3 (H3B-I/H3B-IA) - 2024	Undercut 82-deg Flat Countersunk Head Screws,Type I and IA [TABLE 2.2.3-2 I/IA]
18	[EN] EN 4162 - 2016	Aerospace Series - Screws, 100° Countersunk Normal Head, Offset Cruciform Recess, Coarse Tolerance Normal Shank, Medium Length Thread, in Alloy Steel, Cadmium Plated - 1100 MPa (at Ambient Temperature)/235 °C
19	[DIN] DIN 34811 - 1999	Plastic Flat Head Screws with Cross Recess
20	[ASME] ASME B 18.6.3 (T4-I/T4-IA) - 2013	100° Cross Recessed Countersunk Head Screws [Table 4] (ASTM F837, F468)
21	[ASME] ASME B 18.6.3 (H4A) - 2024	82° Flat Coutersunk Trim Head Screws (ASTM F837/F468) [TABLE 2.2.4-1,-2 I/IA]
22	[ISO] ISO 7046-1 - 1994	Cross Recessed Countersunk Head Screws
23	[ASME/ANSI] ASME/ANSI B 18.6.7M - 1998	Metric Cross Recessed Countersunk Screws
24	[ASME/ANSI] ASME/ANSI B 18.6.7M - 1998	Metric PZ Drives Countersunk Head Screws
25	[ISO] ISO 5856 - 2008	Aerospace - Screws, 100 Degrees Normal Countersunk Head, Internal Offset Cruciform Ribbed or Unribbed Drive, Normal Shank, Short or Medium Length MJ Threads, Metallic Material, Coated or Uncoated, Strength Classes Less Than or Equal To 1100 Mpa - Dimensi
26	[ASME] ASME B 18.6.3 (T10-I/T10-IA) - 2013	Undercut 82-deg Flat Countersunk Head Screws，Type I and IA
27	[ISO] ISO 7046 (-1) - 2011	Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess - Product Grade A - Steel Screws of Property Class 4.8
28	[ASME] ASME B 18.6.3 (H1D-I/H1D-IA) - 2024	100° Cross Recessed Countersunk Head Screws (ASTM F837/F468) [TABLE 2.2.1-4 I/IA]
29	[JIS] JIS B 1111 (T6) - 2017	Cross Recessed Countersunk Head Screws - Class 4.8
30	[BS] BS 1981 - 1991	Recessed Truncated Countersunk Head Screws: Long Length
31	[JIS] JIS B 1111 (T2) - 1996	Cross Recessed Countersunk Head Screws - Class 4.8
32	[NF] NF E 25-119-2 - 1994	Cross Recessed Countersunk Head Screws - Grade A, Class 8.8
33	[GB] GB /T 819.2 - 2016	Countersunk Flat Head Screws with Cross Recess - Part 2: Property Class 8.8, Stainless Steel Screws and Non-ferrous Metal Screws
34	[JIS] JIS B 1111 (T3) - 1996	Cross Recessed Countersunk Head Screws - Class 8.8
35	[NF] NF E 25-119-1 - 1994	Countesunk Flat Head Screws,with Type H or Type Z Cross Recessed - Product Grade A, Class 4.8
36	[UNI] UNI 7688 - 1977	Cross Recessed Countersunk Head Screws
37	[JIS] JIS B 1111 (T2) - 2006	Cross Recessed Countersunk Head Screws - Class 4.8
38	[JIS] JIS B 1111 (JA4) - 2017	Cross Recessed Countersunk Head Screws
39	[BS] BS 1981 - 1991	Recessed Truncated Countersunk Head Screws:short Length
40	[JIS] JIS B 1111 (T9) - 2017	Cross Recessed Countersunk Head Screws - Class 8.8
41	[NF] NF L 22-161 - 1984	Bolt, 100 Degrees Countersunk Head, Current Use, NF L 22-072 Cross Recess
42	[GB] GB /T 819.2 - 1997	Cross Recessed Countersunk Flat Head Screws (Common Head Style) - Grade A - Part 2: Steel of Property Class 8.8, Stainless and Non-Ferrous Metals
43	[JIS] JIS B 1111 (T3) - 2006	Cross Recessed Countersunk Head Screws - Class 8.8
44	[BS] BS 450 - 1958	Cross Recessed 90° Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]
45	[IS] IS 7485 - 1985 (R2001)	Cross Recessed Countersunk Head Screws
46	[IS] IS 7485 (-1) - 2005	Countersunk Flat Head Screws (Common Head Style) with Type H or Type Z Cross Recess - Product Grade A
47	[KS] KS B 1023 (T3) - 2001	Non-ferrous Metal Cross Recessed Countersunk Head Screws - Class 8.8
48	[KS] KS B 1023 (T2) - 2001	Cross Recessed Countersunk Head Screws - Class 4.8
49	[KS] KS B 1023 (T8) - 2016 (R2021)	Non-ferrous Metal Cross Recessed Countersunk Head Screws - Class 8.8
50	[KS] KS B 1023 (T7) - 2016 (R2021)	Cross Recessed Countersunk Head Screws - Class 4.8
51	[CNS] CNS 4560 - 1981	Cross Recessed Countersunk Head Screws
52	[AS] AS /NZS 1427 - 1996	ISO Metric Cross-Recess Countersunk Screws [Table 1]
53	[GOST] GOST 17475 - 1980	Countersunk Head Screws of Accuracy Classes A and B (Cross Recessed)