UNC Threads
Available with metric threads.
Also available with optional bolt lengths.
Top washer has the following features:
- The Working Load Limit and Recommended Torque value are permanently stamped into each washer.
- Washer is color coded for easy identification Red - UNC thread
Bolt Size Identification
The size of the bolt will be stated as in the following example.
Illustration shows meaning of each dimension given.
|
Mfg. #
|
CSI Ref. #
|
Torque (ft. lbs.)
|
Est. Weight Each (lbs.)
|
Working Load Limit* (lbs.)
|
|
1016887†
|
CS-07-1389
|
7
|
0.43
|
800
|
|
1016898†
|
CS-07-1390
|
12
|
0.43
|
1,000
|
|
1016909
|
CS-07-1391
|
28
|
2.49
|
2,500
|
|
1016912†
|
CS-07-1392
|
28
|
2.52
|
2,500
|
|
1016920
|
CS-07-1393
|
60
|
2.55
|
4,000
|
|
1016924†
|
CS-07-1394
|
60
|
2.7
|
4,000
|
|
1016931
|
CS-07-1395
|
100
|
2.65
|
5,000
|
|
1016935†
|
CS-07-1396
|
100
|
3
|
5,000
|
|
1016942
|
CS-07-1397
|
100
|
7
|
7,000
|
|
1016946†
|
CS-07-1398
|
100
|
7
|
7,000
|
|
1016953
|
CS-07-1399
|
160
|
7
|
8,000
|
|
1016957†
|
CS-07-1400
|
160
|
7
|
8,000
|
|
1016964
|
CS-07-1401
|
230
|
7.5
|
10,000
|
|
1016969†
|
CS-07-1402
|
230
|
7.5
|
10,000
|
|
1016975
|
CS-07-1403
|
470
|
14.79
|
15,000
|
|
1016986
|
CS-07-1404
|
800
|
33
|
24,000
|
|
1016997
|
CS-07-1405
|
1100
|
36
|
30,000
|
* Ultimate load is 5 times the Working Load Limit.
† Long bolts are designed to be used with soft metal (i.e., aluminum) work pieces. While the long bolts may also be used with ferrous metal (i.e.,steel & iron) work pieces, short bolts are designed for ferrous work pieces only.
†† Bolt specification is a Grade 8 Alloy socket head cap screw to ASTM A 574. All threads listed are UNC - 3A.
UNC Threads Specifications
|
Mfg. #
|
Dimensions (in.)
|
|
Bolt Size †† A
|
Effective Thread Projection Length B
|
C
|
D
|
Radius E
|
Diameter F
|
G
|
H
|
|
1016887†
|
5/16–18 x 1.5
|
0.59
|
2.69
|
1
|
0.46
|
0.38
|
1.69
|
1.11
|
|
1016898†
|
3/8–16 x 1.5
|
0.59
|
2.69
|
1
|
0.46
|
0.38
|
1.69
|
1.09
|
|
1016909
|
1/2–13 x 2
|
0.71
|
4.82
|
2
|
0.88
|
0.75
|
3.3
|
2.29
|
|
1016912†
|
1/2–13 x 2.5
|
1.21
|
4.82
|
2
|
0.88
|
0.75
|
3.3
|
2.29
|
|
1016920
|
5/8–11 x 2
|
0.71
|
4.82
|
2
|
0.88
|
0.75
|
3.3
|
2.21
|
|
1016924†
|
5/8–11 x 2.75
|
1.46
|
4.82
|
2
|
0.88
|
0.75
|
3.3
|
2.21
|
|
1016931
|
3/4–10 x 2.25
|
0.96
|
4.82
|
2
|
0.88
|
0.75
|
3.3
|
2.05
|
|
1016935†
|
3/4–10 x 2.75
|
1.46
|
4.82
|
2
|
0.88
|
0.75
|
3.3
|
2.05
|
|
1016942
|
3/4–10 x 2.75
|
0.9
|
6.55
|
3
|
1.37
|
1
|
4.73
|
2.98
|
|
1016946†
|
3/4–10 x 3.5
|
1.65
|
6.55
|
3
|
1.37
|
1
|
4.73
|
2.98
|
|
1016953
|
7/8–9 x 2.75
|
0.9
|
6.55
|
3
|
1.37
|
1
|
4.73
|
2.85
|
|
1016957†
|
7/8–9 x 3.5
|
1.65
|
6.55
|
3
|
1.37
|
1
|
4.73
|
2.85
|
|
1016964
|
1–8 x 3
|
1.15
|
6.55
|
3
|
1.37
|
1
|
4.73
|
2.73
|
|
1016969†
|
1–8 x 4
|
2.15
|
6.55
|
3
|
1.37
|
1
|
4.73
|
2.73
|
|
1016975
|
1-1/4–7 x 4.5
|
2.22
|
8.7
|
3.75
|
1.75
|
1.25
|
6
|
3.92
|
|
1016986
|
1-1/2–6 x 6.5
|
2.98
|
12.39
|
4.75
|
2.25
|
1.75
|
8
|
5.64
|
|
1016997
|
2–4-1/2 x 6.5
|
2.98
|
12.39
|
4.75
|
2.25
|
1.75
|
8
|
5.14
|
* Ultimate load is 5 times the Working Load Limit.
† Long bolts are designed to be used with soft metal (i.e., aluminum) work pieces. While the long bolts may also be used with ferrous metal (i.e.,steel & iron) work pieces, short bolts are designed for ferrous work pieces only.
†† Bolt specification is a Grade 8 Alloy socket head cap screw to ASTM A 574. All threads listed are UNC - 3A.
