A training presentation on hex cap screw products provided by Brighton Best International.

1. Welcome To
An Introduction to
Hex Head Cap Screw Products
© Brighton-Best International, Inc.

2.  Brighton Best was
founded in 1925
 With 20 US locations,
BBI is the largest master
distributor of
commercial fasteners
 Stocking over 80,000
SKUs, BBI offers the
most comprehensive line
of fasteners in the
Industry
Brighton Best International

3. Learning
Objectives
Identify the Grades
Understand the Grade
Characteristics
Name the Available
Finishes
What Makes L9 Special
Who Uses Hex Caps?

4. K n o w n b y t w o n a me s , h e x h e a d c a p
s c re w s o r s i mp l y, h e x c a p s c re w s , h e x
h e a d c a p s c re w p ro d u c t s a re a l e a d i n g
l i n e f o r i n d u s t r i a l s u p p l i e r s a ro u n d
t h e w o r l d . Av a i l a b l e i n mu l t i p l e
g r a d e s a n d f i n i s h e s b a s e d o n t h e
a p p l i c a t i o n , o u r H e x C a p s a re s o u rc e d
b o t h d o me s t i c a l l y a n d i mp o r t e d .
Hex Cap Products

5. Primary
Markets
 Industrial
 Automotive
 Electrical
 Power/Energy
 Military
 Rail
 Municipal

6. Hex Head Cap Screws vs. Hex Bolts
A cap screw has a flat washer face
underneath the head
Washer Face
• Hex bolts do not
Cap screws are chamfered on the end easing its
insertion into a tapped hole.
Tightening
• Hex bolts require a nut
Cap screws fall under ASTM J429Specs
• Hex bolts fall under ASTM A307
Cap screws have tighter tolerances than Hex bolts
Tolerances

7. What is on a
Buyer’s Mind?
 What Grade is Required?
 Hex cap screws come in 3 grades based on
strength.
 What finish do they need?
 It is important to know whether the end
user needs them plain or plated
 Domestic or Imported?
 Some applications require domestic
material, while others do not. Whether
domestic or import, all hex caps fall under
the same specifications and are made
under IFI standards.
 Is it inch or metric?
 Knowing whether the need is inch or metric
is critical to servicing the buyer’s needs.

8. • An assembly
operation not
requiring excessive
strength
• Electrical repair
• General Hardware
Applications
Applications
Head
Marking
Specification Fastener
Discription
Material Nominal Size
Range (in.)
Proof Load
(psi)
Yield
Strength Min.
(psi)
Tensile
Strength Min.
(psi)
No Head Mark ASTM SAE
J429
Bolts, Screws Low or Medium
Carbon Steel
¼ thru ¾
¾ - 1 ½
55,000
33,000
57,000
36,000
74,000
60,000
Plain, Zinc CR+3
Grade 2

9. Head
Marking
Specification Fastener
Discription
Material Nominal Size
Range (in.)
Proof Load
(psi)
Yield
Strength Min.
(psi)
Tensile
Strength Min.
(psi)
Three Radial
Lines
ASTM SAE
J429
Bolts, Screws Low or Medium
Carbon Steel
¼ thru 1
1 – 1 1/2
1 ½ - 3
85,000
74,000
55,000
92,000
81,000
58,000
120,000
105,000
90,000
Grade 5

10. M A N U F A C T U R E D F R O M M E D I U M C A R B O N S T E E L ,
M E T R I C H E X H E A D S M A D E T O C L A S S 8 . 8 A R E
S I M I L A R T O A G R A D E 5 I N S T R E N G T H .
Nominal Size
Range (mm)
Proof Load
(Mpa)
Min. Yield
Strength
(MPa)
Min. Tensile
Strength
(MPa)
All sizes below
16mm
580 640 800
16mm – 72mm 600 660 830
Plain, Zinc-Blue
Metric 8.8

11. Head
Marking
Specification Fastener
Discription
Material Nominal Size
Range (in.)
Proof Load
(psi)
Yield
Strength Min.
(psi)
Tensile
Strength Min.
(psi)
Six Radial Lines ASTM SAE
J429
Bolts, Screws Medium
Carbon,
Quenched and
Tempered
¼ - 1 1/2 120,000 130,000 150,000
P R O D U C E D U S I N G M E D I U M C A R B O N S T E E L , T H E
G R A D E 8 H E X C A P S C R E W S A R E U S E D I N
A U T O M O T I V E A N D O T H E R H I G H - S T R E S S
E N V I R O N M E N T S . A V A I L A B L E I N P L A I N A N D
Z I N C - Y E L L O W F I N I S H E S , B B I S U P P L I E S G R A D E 8
P R O D U C T S F R O M T H E U . S . A N D T A I W A N . Plain, Zinc-
Yellow CR+3
Grade 8

12. P R O D U C E D U S I N G M E D I U M C A R B O N S T E E L , T H E
C L A S S 1 0 . 9 M E T R I C H E X C A P S C R E W S , A R E
C O M P A R A B L E T O A G R A D E 8 I N S T R E N G T H .
A V A I L A B L E I N P L A I N A N D Z I N C - B L U E F I N I S H
F O R C O R R O S I O N R E S I S T A N C E .
Nominal Size
Range (mm)
Proof Load
(Mpa)
Min. Yield
Strength
(MPa)
Min. Tensile
Strength
(MPa)
5mm – 100mm 830 940 1040
Plain, Zinc-Blue
Metric 10.9

13. L 9 H e x C a p S c r e w
H i g h e r H e a d a l l o w s f o r i n c r e a s e d w r e n c h a b i l i t y
1 8 0 , 0 0 0 p s i m i n T e n s i l e S t r e n g t h
L 9 H e x N u t
L a r g e r t h a n s t a n d a r d n u t w a l l s
L 9 P r e v a i l i n g T o r q u e H e x N u t
F o r a s s e m b l i e s s u b j e c t t o v i b r a t i o n
L 9 S A E o r U S S F l a t W a s h e r s
H R C 4 0 - 4 5 a n d p l a t e d f i n i s h e s t h a t a s s i s t i n
t o r q u e , w i t h s i n g l e c h a m f e r i n s i d e d i a m e t e r .
Made in the USA
The L9 Fastening System

14. I nc h P ro d uc t s M e t ric P ro duc t
1 8 - 8 H e x C a p s A 2 H e x C a p s
(D i n 9 3 1 , 9 3 3 )
3 1 6 He x C a p s
1 8 - 8 F u l l Th r e a d e d H e x C a p s
Stainless Hex Cap Products
Series Property Marking Diameter Range Tensile Strength ksi
18-8 F593C
F593D
¼ - 5/8
¾ - 1 ½
100 - 150
85 - 140
316 F593G
F593H
¼ - 5/8
¾ - 1 ½
100 – 150
85 - 140
A2 (DIN 931, 933) A2-70 ALL 700 MPa

15. Diameter and
Thread
Comparison
Course and Fine
Threaded Fasteners
The thread length is the
number of threads per
inch. So for ¼-20, you
have a 1/4’ diameter
fastener with 20
threads per inch.
Course threaded
fasteners have fewer
threads per inch than
fine threaded products.
COARSE FINE
M6-1.00 M6-0.75
M8-1.25 M8-1.00
M10-1.50 M10-1.25
M12-1.75 M12-1.50
M14-2.00 M14-1.50
M16-2.00 M16-1.50
M20-2.50 M20-1.50
M22-2.50 M22-1.50
M24-3.00 M24-2.00
M27-3.00 M27-2.00
M30-3.50 M30-2.00
M36-4.00 M36-2.00
M42-4.50 M42-2.00
M48-5.00 M48-2.00
COARSE FINE
¼-20 ¼-28
5/16-18 5/16-24
3/8-16 3/8-24
7/16-14 7/16-20
½-13 ½-20
9/16-12 9/16-18
5/8-11 5/8-18
¾-10 ¾-16
7/8-9 7/8-14
1-8 1-14
1 1/8-7 1 1/8-12
1 ¼-7 1 ¼-12
1 3/8-6 1 3/8-12
1 ½-6 1 ½-12

16. Tensile Strength
Comparison
Tensile strength is the
maximum stress level
that a fastener can
withstand before it
exhibits structural loss.
That is to say the
maximum amount of
pressure a fastener can
be pulled before it
breaks.

17. Head and
Wrench Size
Want to know what
wrench size goes with
each diameter?
Bolt Diameter Wrench Size
#6 ¼
#8 ¼
#10 5/16
#12 5/16
¼ 7/16 or 3/8
5/16 ½
3/8 9/16
7/16 5/8
½ ¾
9/16 13/16
5/8 15/16
¾ 1 1/8
7/8 1 5/16
1 1 ½
1 1/8 1 11/16
1 ¼ 1 7/8

18. Grade 5 Hex Cap Possibilities
Finding Hex Caps in BBIs
Web-Ordering System

19. A. How many inch grades of hex cap screws does BBI carry?
B. How many families of Grade 5 hex cap screws does BBI offer?
C. What ASTM specification does hex cap screws fall under?
D.Are hex cap screws available imported and domestic?
E. Are Grade 8 hex cap screws stronger than Grade 5 hex cap screws?
F. What is the head marking for a L9 hex cap screws?
G.What finishes are available for Grade 2 hex cap screws?
Questions

20. A. Three, Grades 2, 5 and 8
B. 8
C. J429
D.Yes
E. Yes, their tensile strength is 92k min vs. 120k min, 120k
max vs. 150k max
F. L9
G.Plain and zinc-plated
Answers

21. O n b e h a l f o f t h e e n t i r e B r i g h t o n B e s t f a m i l y,
w e w a n t t o t h a n k y o u f o r t a k i n g a f e w m i n u t e s
t o l e a r n m o r e a b o u t w h o w e a r e , o u r
va l u e - s y s t e m a n d o u r p r o d u c t s .
E v e r y t i m e y o u p l a c e a n o r d e r w i t h u s , y o u a r e
g i v i n g u s a n o p p o r t u n i ty t o p r o v e o u r
c o m m i t m e n t t o s e r v i n g y o u .
T h a n k y o u f o r t h e o p p o r t u n i ty a n d p r i v i l e g e o f
w o r k i n g w i t h yo u .
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