ANSI/ASME B 18.5 A307, SAE J429, F468, F593 Countersunk Square Neck Bolts

ANSI/ASME B 18.5 A307, SAE J429, F468, F593 Countersunk Square Neck Bolts

Product Decription

Countersunk head screw, also called countersunk head screw, also known as flat machine screw, is a kind of construction part. The head is a 90-degree cone, similar to common wood screws. The head has tool tightening grooves, such as a zigzag, cross, hexagon, plum blossom, pentagon, etc.

Size	M3-M72(3/16''- 4'')
Grade	SUS201,SUS304,SUS316,A2-70,A2-80,A4-80,4.8 6.8 8.8 10.9 12.9
Material	carbon steel, alloy steel, stainless steel
Color	Plain, ZincPlated(Clear/Blue/Yellow/Black), black oxide, H.D.G,
Standard	DIN GB ISO JIS BA ANSI
Brade	G&T
Thread	unc,unf,metric thread
Used	building industry machinery 43546
Certification	ISO9001, SGS, CTI, ROHS

ANSI/ASME B 18.5 A307, SAE J429, F468, F593 Countersunk Square Neck Bolts 0

Screw Thread
d

d
PP	UNC
d_s	max
	min
d_k	max
	min
k	max
	min
s	max
	min
k₁	max
	min

0.1900	0.2500	0.3125	0.3750	0.4375	0.5000	0.6250	0.7500
24	20	18	16	14	13	11	10
0.199	0.260	0.324	0.388	0.452	0.515	0.642	0.768
0.182	0.237	0.298	0.360	0.421	0.483	0.605	0.729
0.548	0.682	0.821	0.960	1.093	1.233	1.495	1.754
0.500	0.625	0.750	0.875	1.000	1.125	1.375	1.625
0.131	0.154	0.184	0.212	0.235	0.265	0.316	0.368
0.112	0.135	0.159	0.183	0.205	0.229	0.272	0.314
0.199	0.260	0.324	0.388	0.452	0.515	0.642	0.768
0.185	0.245	0.307	0.368	0.431	0.492	0.616	0.741
0.125	0.156	0.219	0.250	0.281	0.312	0.406	0.500
0.094	0.125	0.188	0.219	0.250	0.281	0.375	0.469

①,Minimum Thread Length:
The minimum length of thread shall be equal to twice the basic bolt diameter plus 0.25 in. for nominal bolt lengths of 6 in. or shorter, and twice the basic bolt diameter plus 0.50 in. for longer nominal lengths.
Bolts of nominal lengths too short to accommodate the minimum thread lengths shall be threaded full length. The length from the head or neck to the first complete (full form) thread shall not exceed the length of 2-1/2 threads for sizes up to and including 1 in., and 3-1/2 threads for sizes over 1 in.

Packing & Shipping

Package details:

1) Sample order, 20/25kg per carton with our logo or neutral package;

2) For Large orders, we can custom packaging;

3) Normal Packing: 1000/500/250pcs per small box. then into cartons and pallet;

4) According to customers' requirements.

FAQ

1. How do you let me trust you?
We are a Golden supplier in Alibaba who do business for more than 5 years. You can make an order by Alibaba to us directly.

2. How about your price?
High-quality products with a reasonable price suitable for your market.

3. How do you control your quality?
We request a QC inspection for each batch of goods. And we can provide you inspection report and mill certificate if you want..

4. Could you provide free samples?
For new customers, We can provide free samples for standard fasteners. But the clients will pay the express charges. For regular customers, We will send you free samples and pay express charges by ourselves.

5. How about your delivery time?
Generally speaking, All the goods have stock with little quantity, we can delivery them with one week. If the quantity is 1-2container, we can give you with 30-45days.

6. What is your packing?
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallet is about 900-960kg, We also can make the customer's logo on the cartons. Or we customized cartons according to customers' requirement, If you need small box packing, we can do according to your requirement.

7. What is your payment term?
We can accept T/T,LC for general order. For new customer, we request 20%-50% T/T in advance, and balance payment should against B/L copy. For regular customer, we can provide delay payment after B/L date about 30-90 days.