Description:

A one-piece bolt with a 24-sided head and a flanged bearing surface, made of alloy steel.

 

Advantages:

Popular in aircraft manufacturing and aftermarket because of its ease of installation with pneumatic wrenches.

 

12 Point Flange Screw

 

 

12-POINT FLANGE SCREWS ALLOY STEEL IFI 115
Nominal Size
B
D
F
C

H
T
A
R

LT
Body Diameter
Flange Diameter

Width Across

Flats

Width Across Corner
Head Height
Flange Thick

Gaging

Ring

Thickness

Gaging

Ring

Diameter

Thread Length
Min
Max
Min
Max
Min
Max
Max
Min
Max
Min
Max
Min
Basic
1/4
0.2435
0.375
0.365
0.252
0.244
0.278
0.260
0.058
0.0525
0.0522
0.2783
0.2780
1.000
5/16
0.3053
0.469
0.457
0.315
0.306
0.348
0.312
0.074
0.0600
0.0597
0.3483
0.3480
1.125
3/8
0.3678
0.562
0.550
0.377
0.368
0.420
0.375
0.095
0.0711
0.0708
0.4203
0.4200
1.250
7/16
0.4294
0.656
0.642
0.438
0.429
0.489
0.438
0.109
0.0840
0.0837
0.4893
0.4890
1.375
1/2
0.4919
0.750
0.735
0.502
0.493
0.562
0.500
0.129
0.0948
0.0945
0.5623
0.5620
1.500
9/16
0.5538
0.844
0.828
0.564
0.555
0.633
0.563
0.145
0.1071
0.1068
0.6333
0.6330
1.625
5/8
0.6163
0.938
0.921
0.627
0.618
0.705
0.625
0.166
0.1179
0.1176
0.7053
0.7050
1.750
3/4
0.7406
1.125
1.107
0.752
0.743
0.847
0.750
0.200
0.1416
0.1413
0.8473
0.8470
2.000
7/8
0.8647
1.312
1.293
0.877
0.866
0.987
0.875
0.234
0.1656
0.1653
0.9873
0.9870
2.250
1
0.9886
1.500
1.479
1.003
0.991
1.130
1.000
0.268
0.1893
0.1890
1.1303
1.1300
2.500
1-1/8
1.1086
1.688
1.665
1.128
1.115
1.271
1.125
0.310
0.2109
0.2106
1.2713
1.2710
2.750
1-1/4
1.2336
1.875
1.852
1.253
1.240
1.414
1.250
0.350
0.2331
0.2328
1.4143
1.4140
3.000
1-3/8
1.3568
2.062
2.038
1.378
1.365
1.556
1.375
0.392
0.2544
0.2541
1.5563
1.5560
3.250
1-1/2
1.4818
2.250
2.224
1.503
1.489
1.697
1.500
0.433
0.2763
0.2760
1.6973
1.6970
3.500

**Product standards require the manufacturer’s head marking to appear on the top of all bolts 1/4” diameter and larger. “X” represents one location such a marking may appear.

 

 

 

 

 

Email: E-mail Fastenerz.com

sales@fastenerz.com


Credit Accepted:
[IMAGE: Master card credit card] [IMAGE: Visa credit card]

  
 

Thank You!

February 24, 2004 All Rights Reserved © 1999-2004 Copyright
No part of this web document or its images may be used or copied

without written permission of Fastenerz.com
Violators will be prosecuted to the full extent of the law.