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852 Big Sewickley Creek Road
Sewickley, PA, 15143
United States

724-266-3003

Baden Steelbar & Bolt Corporation is a family-owned manufacturer and distributor of fasteners based in Pittsburgh, Pennsylvania.  We provide both stocked and custom anchor bolts, anchor bolt assemblies, threaded rod, bolts, bent bolts, nuts, washers, turnbuckles, clevises and more.  CNC maching, welding, threading.

ASTM A194

A194 is a ASTM International specification for nuts. A194 covers a variety of carbon, alloy and stainless steel nuts in sizes 1/4" through 4", M6 through M100 nominal in metric. Nuts of this specification are intended for high-pressure or high-temperature use, or both.

ASTM A194

A194 is a ASTM International specification for nuts

 

A194 covers a variety of carbon, alloy and stainless steel nuts in sizes 1/4" through 4", M6 through M100 nominal in metric. Nuts of this specification are intended for high-pressure or high-temperature use, or both.


A194 Grades

 

A194 Grade 2:

Carbon steel heavy hex nuts.

 

A194 Grade 2H:

Quenched and tempered carbon steel heavy hex nuts.

 

A194 Grade 7:

Quenched and tempered alloy steel heavy hex nuts.

 

A194 Grade 7L:

Quenched and tempered alloy steel heavy hex nuts, Charpy impact tested.

 

A194 Grade 8:

Stainless AISI 304 heavy hex nuts.

 

A194 Grade 8M:

Stainless AISI 316 heavy hex nuts.

 

NOTE: There are other grades of A194. Those listed here are the ones we receive the most requests for. For information on other types, please contact one of our salesmen.


A194 MECHANICAL PROPERTIES

Grade Marking Size Tempering Temp.
Farenheit
Proof Load Stress, ksi Hardness Brinell
Min Max
2 2 1/4" - 4" 0 150 159 352
2H 2H 1/4" - 1-1/2" 850 175 248 327
2H 2H 1-1/2" - 4" 850 175 212 327
7 7 1/4" - 4" 1100 175 248 327
8 8 1/4" - 4" - 80 126 300
8M 8M 1/4" - 4" - 80 126 300

Notes:

  1. The markings shown for all grades of A194 nuts are for cold-formed and hot-forged nuts. When nuts are machined from bar stock, the nut must additionally be marked with the letter B. The letters H & M indicate heat-treated nuts.
  2. Properties shown are those of coarse and 8-pitch thread heavy hex nuts. 
 

A194 CHEMICAL PROPERTIES

Element 2, 2H 7 8 (AISI 304) 8M (AISI 316)
Carbon 0.4% min 0.37 - 0.49% 0.08% max 0.08% max
Manganese 1.0% max 0.65 - 1.1% 2.0% max 2.0% max
Phosphorus, max 0.04% 0.035% 0.045% 0.045%
Sulfur, max 0.05% 0.04% 0.03% 0.03%
Silicon 0.40% max 0.15 - 035% 1.0% max 1.0% max
Chromium 0.75 - 1.2% 18.0 - 20.0% 16.0 - 18.0%
Nickel 8.0 - 11.0% 10.0 - 14.0%
Molybdenum 0.15 - 0.25% 2.0 - 3.0%

nut dimensions

HEX NUT DIMENSIONS

Nut Size Heavy Hex Nut Heavy Hex Jam Nut
A B A C
1/4" 1/2 15/64 1/2 11/64
5/16" 9/16 19/64 9/16 13/64
3/8" 11/16 23/64 11/16 15/64
7/16" 3/4 27/64 3/4 17/64
1/2" 7/8 31/64 7/8 19/64
9/16" 15/16 35/64 15/16 21/64
5/8" 1-1/6 39/64 1-1/16 23/64
3/4" 1-1/4 47/64 1-1/4 27/64
7/8" 1-7/16 55/64 1-7/16 31/64
1" 1-5/8 63/64 1-5/8 35/64
1-1/8" 1-13/16 1-7/64 1-13/16 39/64
1-1/4" 2 1-7/32 2 23/32
1-3/8" 2-3/16 1-11/32 2-3/16 25/32
1-1/2" 2-3/8 1-15/32 2-3/8 27/32
1-5/8" 2-9/16 1-19/32 2-9/16 29/32
1-3/4" 2-3/4 1-23/32 2-3/4 31/32
1-7/8" 2-15/16 1-27/32 2-15/16 1-1/32
2" 3-1/8 1-31/32 3-1/8 1-3/32
2-1/4" 3-1/2 2-13/64 3-1/2 1-13/64
2-1/2" 3-7/8 2-29/64 3-7/8 1-29/64
2-3/4" 4-1/4 2-45/64 4-1/4 1-37/64
3" 4-5/8 2-61/64 4-5/8 1-45/64
3-1/4" 5 3-3/16 5 1-13/16
3-1/2" 5-3/8 3-7/16 5-3/8 1-15/16
3-3/4" 5-3/4 3-11/16 5-3/4 2-1/16
4" 6-1/8 3-15/16 6-1/8 2-3/16

THREAD DIMENSIONS & OVERSIZING ALLOWANCES

FOR HOT-DIPPED GALVANIZED NUTS
Size & Thread Pitch Diametral Allowance Pitch Diameter
min max
1/4"-20 0.016 0.2335 0.2384
5/16"-18 0.017 0.2934 0.2987
3/8"-16 0.017 0.3514 0.3571
7/16"-14 0.018 0.4091 0.4152
1/2"-13 0.018 0.4680 0.4745
9/16"-12 0.020 0.5284 0.5352
5/8"-11 0.020 0.5860 0.5932
3/4"-10 0.020 0.7050 0.7127
7/8"-9 0.022 0.8248 0.8330
1"-8 0.024 0.9428 0.9516
1-1/8"-8 0.024 1.0678 1.0768
1-1/8"-7 0.024 1.0562 1.0656
1-1/4"-8 0.024 1.1928 1.2020
1-1/4"-7 0.024 1.1812 1.1908
1-3/8"-8 0.027 1.3208 1.3301
1-3/8"-6 0.027 1.2937 1.3041
1-1/2"-8 0.027 1.4458 1.4553
1-1/2"-6 0.027 1.4187 1.4292
1-3/4"-5 0.050 1.6701 1.6817
2"-4.5 0.050 1.9057 1.9181
2-1/4"-4.5 0.050 2.1557 2.1683
2-1/2"-4 0.050 2.3876 2.4011
2-3/4"-4 0.050 2.6376 2.6513
3"-4 0.050 2.8876 2.9015
3-1/4"-4 0.050 3.1376 3.1517
3-1/2"-4 0.050 3.3876 3.4019
3-3/4"-4 0.050 3.6376 3.6521
4"-4 0.050 3.8876 3.9023