All AMPG Screws and Bolts are Precision Made

 

AMPG manufactures a wide variety of bolts and screws. For shoulder screws/shoulder bolts and screws compatible with binding barrels, please select ‘Shoulder Screws’, ‘Binding Machine Screws’ or ‘Binding Shoulder Screws’ product categories. AMPG manufactures a wide range of bolt & screw types and styles to choose. All AMPG manufactured products are made from DFARs compliant materials and are lot traceable to assure fastener quality. Our parts are precision machined from bar stock on programable Swiss CNC Lathes.

Ordering Bolts and Screws

 

Ordering Bolts and Screws

A Bolt or a Screw?

A simple question one would assume but for starters sometimes a screw is called a bolt and vice versa. The answer to this question has been controversial and varies between experts and organizations. Following are some basic definitions to help you search for bolt & screw products.

Machinery’s Handbook 26th Edition, © 2000 by Industrial Press Inc.

Differentiation between Bolt and Screw. – A bolt is an externally threaded fastener designed for insertion through holes in assembled parts and is normally intended to be tightened or released by torquing a nut. A screw is an externally threaded fastener capable of being inserted into holes in assembled parts, of mating with a preformed internal thread or forming its own thread and of being tightened or released by torquing the head. An externally threaded fastener which is prevented from being turned during assembly, and which can be tightened or released only by torquing a nut is a bolt.

(Example: round head bolts, track bolts, plow bolts.)

An externally threaded fastener that has a thread form which prohibits assembly with a nut having a straight thread of multiple pitch length is a screw. (Example: wood screws, tapping screws.)

Download Catalog
Material Type Specification Tensile, psi Yield, psi Estimated Shear, psi Elongation Brinell Hardness Rockwell Hardness
Aluminum 6061-T6 ASTM B211 45,000 40,000 22,500 17% BHN 95 B56
Brass 360 ASTM B16 58,000 45,000 29,000 25% BHN 143 B78
Nickel Alloy 405 (Monel) ASTM B164 85,000 60,000 42,500 24% BHN 163 B85
Stainless Steel 18-8 (303) ASTM A582 90,000 35,000 45,000 50% BHN 160 B83
Stainless Steel 316 (316/316L) ASTM A276 75,000 30,000 37,500 45% BHN 160 B83
Stainless Steel High Five® (316 H5) ASTM A276 125,000 100,000 62,500 26% BHN 250 C25
Stainless Steel 416 Cond A
ASTM A582 Cond T
75,000
123,000
40,000
110,000
37,500
61,500
30%
11%
BHN 155
BHN 245
B82
C24
Stainless Steel 17-4 PH Cond A
ASTM A564 TYPE 630
160,000 145,000 80,000 15% BHN 332 C36
Stainless Steel A286 ASTM A638 GR 660 160,000 120,000 80,000 27% BHN 248 C24
Steel 12L14 ASTM A108 78,000 60,000 39,000 15% BHN 160 B84
Steel Alloy C4140/4140 (Alloy) ASTM A108 Cold
ASTM A108 Thru Hard
105,000
140,000
85,000
n/a
52,500
70,000
15%
n/a
BHN 187
BHN 300
B91
C32
Steel Grade 2 ASTM A307 Equivalent 60,000 36,000 30,000 18% BHN 160 B70
Titanium Grade 2 ASTM B348 GR 2 75,000 55,000 37,500 20% BHN 163 B85
Titanium Grade 5 (6AL-4V) ASTM B348 GR 5 140,000 125,000 70,000 18% BHN 296 C32


Material Information