Hex Cap Screws

Our bolts and studs range spans hex cap screws, heavy hex structural bolts, carriage and square head bolts, anchor bolts, hook bolts and threaded rod — manufactured in mild steel, alloy steel and stainless steel to ASTM A307, A325, A490 and SAE J429 grades for construction, structural steel and general engineering applications.

Category: Product ID: 9011

Description

SAE J429

Gr.2 / Gr.5 / Gr.8

ASTM A307

GRADE A

ASMT A325

Type 1

ASTM A490

Type 1

ASTM A193

B7 / B8 / B8M

Product Types

The Full Bolts & Studs Range

SAE J439 . ASTM A307​

HEX CAP SCREWS

The standard hex-head bolt for general structural and mechanical assembly.

SAE J429 . ASTM A307

Carriage Bolts

Smooth round head with square shoulder for wood-to-metal and tamper-resistant joints.

ASTM A325 . A490

Heavy Hex Structural Bolts

High-strength structural bolts for steel-to-steel structural connections.

General Purpose

Square Head Bolts

Traditional square-head fastener for agricultural and legacy machinery applications.

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Hex Cap Screws DIMENSIONS IN INCHES
Nominal SizeBody Dia. MaxWidth Across FlatsWidth Across Corners MaxHead Height
1/4.25007/16.50513/64
5/16.31251/2.57715/64
3/8.37509/16.65015/64
1/2.50003/4.8665/16
5/8.625015/161.08325/64
3/4.75001 1/81.29915/32
11.00001 1/21.73239/64
✓ Grades 2, 5 and 8 available — other sizes on request. SAE J429 · ASTM A307
Carriage Bolts DIMENSIONS IN INCHES
Nominal SizeBody Dia. MaxHead Dia. MaxSquare Width Max
1/4.260.594.199
5/16.324.719.234
3/8.388.844.278
7/16.452.969.312
1/2.5151.094.371
5/8.6421.344.456
3/4.7681.594.565
✓ Zinc, galvanized and stainless finishes available. SAE J429 · ASTM A307