Structural Fastener – Line ASTM A307
Hex Structural Fasteners – Line ASTM A307 – Degree A
Fasteners used in secondary connections and recommended to be used in structures not subject to impact and vibrations. Manufactured in low carbon steel and without thermal treatment. The bolts, also known as common bolts, have as the main application’s light structures and similar applications, in which the strengths are static and relatively low. They can also be used in temporary connections. The nuts compatible with this fastener are specified according to the standard ASTM A563 Degree A, and the plain washers, Narrow Type A.
Benefits
Reliability for the mechanical properties, standardized product
Products identified with standardized marking
Higher reliability compared to the welded junctions, as they have a known resistance
It does not require welding in many situations
Possibility of disassembling and reassembling
Applications
Conventional roofing structures (sheds, gantries, arches, fink, etc.)
Spatial roofing structures (mesh in tubular and laminated profiles)
Industrial and commercial sheds
Metallic structure buildings
Mezzanines and platforms
Pipe-rack
Wheel track and overhead cranes
Runways and bridges
Small lattices, guardrail, bracing profiles, platforms, purlins, side rails and small scissors
HEX NUT ASTM A563 DEGREE A
| DIAMETER | THREAD (F.P.P) | WRENCH | PACKAGE (PIECE) |
| 3/8” | 16 UNC | 9/16” | 500 |
| 1/2” | 13 UNC | 3/4” | 200 |
| 5/8” | 11 UNC | 15/16” | 100 |
| 3/4” | 10 UNC | 1.1/8” | 50 |
FLAT WASHER NARROW 1
| DIAMETER | PACKAGE (PIECE) |
| 3/8” | 500 |
| 1/2” | 300 |
| 5/8” | 150 |
| 3/4” | 100 |
HEX BOLT ASTM A307 DEGREE A
| DIAMETER | 3/8” | 1/2” | 5/8” | 3/4” | ||||
| THREAD (F.P.P) | 16 UNC | 13 UNC | 11 UNC | 10 UNC | ||||
| WRENCH | 9/16” | 3/4” | 15/16” | 1.1/8” | ||||
| MINIMUM THREAD LENGTH |
1” | 1.1/4” | 1.1/2” | 1.3/4” | ||||
| TOTAL LENGTH |
TYPE OF THREAD |
PACK. (Piece) | TYPE OF THREAD |
PACK. (Piece) | TYPE OF THREAD |
PACK. (Piece) | TYPE OF THREAD |
PACK. (Piece) |
| 1” | TOTAL | 1000 | TOTAL | 500 | – | – | – | – |
| 1.1/4” | TOTAL | 1000 | TOTAL | 500 | – | – | – | – |
| 1.1/2” | PARTIAL | 1000 | TOTAL | 500 | TOTAL | 300 | – | – |
| 1.3/4” | PARTIAL | 800 | TOTAL | 400 | TOTAL | 250 | – | – |
| 2” | PARTIAL | 800 | PARTIAL | 400 | TOTAL | 250 | TOTAL | 150 |
| 2.1/4” | PARTIAL | 500 | PARTIAL | 300 | PARTIAL | 200 | TOTAL | 150 |
| 2.1/2” | PARTIAL | 500 | PARTIAL | 300 | PARTIAL | 200 | TOTAL | 100 |
| 2.3/4” | – | – | PARTIAL | 300 | PARTIAL | 200 | PARTIAL | 100 |
| 3” | – | – | PARTIAL | 250 | PARTIAL | 150 | PARTIAL | 100 |
*All the items are supplied with hot-galvanized coating, in the quantities informed in the tables as units.
COMPOSITION:
Material: Low carbon steel with quenched tempering
| FINISHING | LAYER THICKNESS | RESISTANCE TO CORROSION | |
| SALT-SPRAY¹ | KESTERNICH² | ||
| HOT GALVANIZED | 50 MICRONS | N/A³ | N/A³ |
| WHITE GALVANIZED | 5 MICRONS | 48 HOURS | N/A³ |
1 – Standards ASTM B117, ABNT NBR 8094 and DIN 50021 (red corrosion).
2 – Standard DIN 50018 (allowing 15% of red corrosion in the bolt head).
3 – Test not applicable.
As the common bolts used in secondary connections, they are assembled without specifications for assembling torque and do not require special care.
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