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Bolts Nuts Screws Washers Pins Miscellaneous

Acorn (Cap) Nuts
Low Crown -- Steel & Stainless

One Piece Hex Cap Nuts, Low Crown
Nominal Size
Basic Major Diameter of Thread
F
G
A
H
G
T
U
Width Across Flats
Width Across Corners
Body Diameter
Overall Height
Hexagon Height
Drill Depth
Full Thread
Max
Min
Max
Min
Max
Min

6

.1380
.3125
.302
.361
.344
.30
.34
.16
.25
.16
8
.1640
.3125
.302
.361
.344
.30
.34
.16
.25
.16
10
.1900
.3750
.362
.433
.413
.36
.41
.19
.28
.19
1/4
.2500
.4375
.428
.505
.488
.41
.47
.22
.34
.25
5/16
.3125
.5000
.489
.577
.557
.47
.53
.25
.41
.31
3/8
.3750
.5625
.551
.650
.628
.53
.62
.28
.45
.38
1/2
.5000
.7500
.736
.866
.840
.72
.81
.38
.59
.50
5/8
.6250
.9375
.922
1.083
1.051
.91
1.00
.47
.75
.62
3/4
.7500
1.0625
1.045
1.227
1.191
1.03
1.16
.53
.88
.75

 

Two Piece Hex Cap Nuts
Nominal
Size
Basic Major
Diameter
of Thread
F
G
H
Width Across Flats
Width Across Corners
Overall Height
Max
Min
Max
Min
Max
Min
4
.1120
.248
.225
-
-
.200
.177

6

.1380
.3125
.032
.361
.344
.260
.240
8
.1640
.3125
.032
.361
.344
.260
.240
10
.1900
.3750
.362
.433
.413
.291
.271
1/4
.2500
.4375
.423
.505
.482
.338
.318
5/16
.3125
.562
.545
.650
.621
.385
.365
3/8
.3750
.625
.607
.722
.692
.432
.412
1/2
.5000
.750
.736
.866
.840
.572
.552
5/8
.6250
.938
.909
1.083
1.037
.807
.787
3/4
.7500
1.12
1.08
-
-
1.12
1.08

Description
Steel: The low-crown cap nut is usually manufactured in two pieces, a hex nut and an acorn-shaped top, zinc die cast to form the finished part.
Stainless: Similar in design to the stell nut but made from an austenitic stainless alloy. Nuts maybe one or two piece style.
Applications/
Advantages
Cap nuts serve two main purposes: 1) as decorative pieces, and 2) as covers for projecting threads.
Material
Steel: Nuts shall be made from a low-carbon steel which conforms to the following chemical composition requirements:
Carbon: 0.47% Max; Phosphorus: 0.12% Max; Sulfur: 0.23% Max.
Stainless: 304L or equivalent stainless.
Plating
Various finishes.


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Certified Company.



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Copyright © 2007 Stanley Industries Incorporated, All rights reserved.

641 North Rochester Road
Clawson, MI 48017

ordering@stanleyind.com
800.253.2658