FASTENER GRADE, MATERIAL & SPECIFICATIONS

 

GRADE ID MARK ASTM SPEC NUMBER FASTENER DESCRIPTION MATERIAL NOMINAL SIZE RANGE (INCH) MECHANICAL
PROPERTIES
BOLTS, SCREWS, STUDS NUTS HARDNESS
YIELD STRENGTH
(MIN PSI)
TENSILE STRENGTH (MIN PSI) PROOF LOAD (PSI) BRINELL
B5 A193 Bolts, screws, and studs for
high temperature service
AISI 501 1/4/2004 80,000 100,000
B6 A193 Bolts,
screws, and studs for high temperature service
AIS I410 85,000 110,000
B7 A193 Bolts, screws, and studs for high temperature
service
AISI 4140, 4142, 4145,
4140H, 4142H, 4145H
1/4 – 2-1/2 105,000 125,000
Over 2-1/2 – 4 95,000 115,000
Over 75,000 100,000
B16 A193 Bolts, screws, and studs for high temperature
service
Chromium, molybdenum and
vanadium alloy steel
1/4 – 2-1/2 105,000 125,000
Over 2-1/2 – 4 95,000 110,000
Over 4-7 85,000 100,000
B8 A193 A320 Bolts, screws, and
studs for high or low temperature service,
respectively—Class 1
AISI 304, carbide
solution treated
1/4 and larger 30,000 75,000 223 max
B8C A193
A320
Bolts, screws, and
studs for high or low temperature service,
respectively—Class 1
AISI 347, carbide
solution treated
1/4 and larger 30,000 75,000 223 max
B8M A193
A320
Bolts, screws, and
studs for high or low temperature service,
respectively—Class 1
AISI 347, carbide
solution treated
1/4 and larger 30,000 75,000 223 max
B8P A193 Bolts, screws, and studs
for high or low temperature service,
respectively—Class 1
ISI 305 [with
restricted carbon], carbide solution treated
1/4 and larger 30000 75,000 223 max
OPTIONAL F593
GROUP 1
Stainless steel bolts, hex capscrews and studs
[properties for cold worked]
304, 305, 384, *303, XM7 [CW] 1/4 – 5/8
INCL.
65000 100000 B95 – C32
3/4 – 1-1/2
INCL.
45,000 85,000 B8O – C32
316 F593
GROUP 2
Stainless steel
bolts, hex capscrews and studs [properties for cold
worked]
316 [CW] 1/4 –
5/8 INCL.
65000 100000 B95 – C32
3/4 – 1-1/2 INCL. 45,000 85,000 B8O – C31
B8T A193,

A320

Bolts, screws, and studs for high
or low temperature service respectively — Class 1
AISI 321, carbide solution treated 1/4 and
larger
30,000 75,000 223 max
B8 A193,

A320

Bolts, screws, and
studs for high or low temperature service
respectively — Class 2
AISI 304,
carbide solution treated & strain hardened
1/4 – 3/4 100,000 125,000 321 max
Over 3/4 – 1 80,000 115,000 321 max
Over 1 – 1-1/4 65,000 105,000 321 max
Over 1-1/4 –
1-1/2
50,000 100,000 321 max
B8C A193,

A320

Bolts, screws, and
studs for high or low temperature service
respectively — Class 2
AISI 347,
carbide solution treated & strain hardened
1/4 – 3/4 100,000 125,000 321 max
Over 3/4 – 1 80,000 115,000 321 max
Over 1 – 1-1/4 65,000 105,000 321 max
Over
1-1/4 – 1-1/2
50,000 100,000 321 max
B8P A193,

A320

Bolts, screws, and
studs for high or low temperature service
respectively — Class 2
AISI 305
[witd restricted carbon], carbide solution treated &
strain hardened
1/4 – 3/4 100,000 125,000 321 max
Over 3/4 – 1 80,000 115,000 321 max
Over 1 – 1-1/4 65,000 105,000 321 max
Over 1-1/4 – 1-1/2 50,000 100,000 321 max
B8T A193
A320
Bolts, screws, and studs for high or low temperature
service respectively — Class 2
AISI 321, carbide solution treated & strain hardened 1/4 – 3/4 100,000 125,000 321 max
Over 3/4 – 1 80,000 115,000 321 max
Over 1 – 1-1/4 65,000 105,000 321 max
Over
1-1/4 – 1-1/2
50,000 100,000 321 max
B8M A193
A320
Bolts, screws, and
studs for high or low temperature service
respectively — Class 2 [C]
AISI
321, carbide solution treated & strain hardened
1/4 – 3/4 95,000 110,000 321 max
Over 3/4 – 1 80,000 100,000 321 max
Over 1 – 1-1/4 65,000 95,000 321 max
Over 1-1/4 –
1-1/2
50,000 90,000 321 max
1 A194 Hot or cold forged nuts for
high pressure & high termperature service.
Carbon steel 1/4 and larger 130,000 121 MIN
120,000
2 A194 Hot or
cold forged nuts for high pressure & high temperature
service.
Carbon Steel 1/4 and larger 150,000 159/352
135,000
2H A194 Hot or cold forged nuts for
high pressure & high temperature service.
Carbon steel, heat treated 1/4
and larger
175,000 248/352
150,000
3 A194 Hot or cold forged nuts for
high pressure & high temperature service.
AISI 501, heat treated 1/4 and
larger
175,000 248/342
150,000
4 A194 Hot or cold forged nuts for
high pressure & high temperature service.
Carbon molybdenum, heat treated 1/4 and larger 175,000 248/352
150,000
6 A194 Hot or cold forged nuts for
high pressure & high temperature service.
AIS I410, heat treated 1/4 and
larger
150,000 228/271
135,000
7 A194 Hot or cold forged nuts for
high pressure & high temperature service.
AIS I4140/4142/4145,4140H, 4142H, 4145H, heat
treated
1/4 and larger 175,000 248/352
150,000
8 A194 Hot or
cold forged nuts for high pressure & high temperature
service.
AISI 304 1/4 and larger 80,000 126/300
75,000
OPTIONAL F594 GROUP 1 Stainless steel nuts [properties for cold worked] 304, 305, 384, *303, XM7 [CW] 1/4 – 5/8 100,000 B95-C32
3/4 -1-1/2 85,000 B80-C32
316 F594
GROUP 2
Stainless steel
nuts [properties for cold worked]
316 [CW] 1-4 – 5/8 100,000 B95-C32
3/4 – 1-1/2 85,000 B80-C32
8B A194 Nuts
machined from bars for high pressure & high
temperature service.
AISI 304 1/4 and larger 80000 126/300
75000
8C A194 Hot or cold forged nuts for
high pressure & high temperature service.
AISI 347 1/4 and larger 80000 126/300
75000
8CB A194 Nuts
machined from bars for high pressure & high
temperatureservice.
AISI 347 1/4 and larger 80000 126/300
75000
8M A194 Hot or cold forged nuts for
high pressure & high temperature service.
AISI 316 1/4 and larger 80000 126/300
75000
8MB A194 Nuts
machined from bars for high pressure & high temperature
service.
AISI 316 1/4 and larger 80000 126/300
75000
8T A194 Hot or cold forged nuts for
high pressure & high temperature service.
AISI 321 1/4 and larger 80000 126/300
75000
8TB A194 Nuts
machined from bars for high pressure & high temperature
service.
AISI 321 1/4 and larger 80000 126/300
75000
8P A194 Hot or cold forged nuts for
high pressure & high temperature service.
AISI 305 [with restricted carbon] 1/4 and larger 80000 126/300
75000
8PB A194 Nuts machined from bars for
high pressure & high temperature service.
AISI 305 [with restricted carbon] 1/4 and larger 80000 126/300
75000
8 A194 Nuts machined from bars for
high pressure & high temperature service.
AISI 304, strain hardened 1/4 –
3/4
125,000
110,000
7/8 – 1 115,000
100,000
1-1/8 – 1-1/4 105,000
95,000
1-3/8 – 1-1/2 100,000
90,000
8C A194 Nuts machined from bars for
high pressure & high temperature service.
AISI 347, strain hardened 1/4 –
3/4
125,000
110,000
7/8 – 1 115,000
100,000
1-1/8 –
1-1/4
105,000
95,000
1-3/8 –
1-1/2
100,000
90,000
8T A194 Nuts machined from bars for
high pressure & high temperature service.
AISI 321, strain hardened 1/4 –
3/4
125,000
110,000
7/8 – 1 115,000
100,000
1-1/8 – 1-1/4 105,000
95,000
1-3/8 – 1-1/2 100,000
90,000
8M A194 Nuts machined from bars for
high pressure & high temperature service.
AIS 316, strain hardened 1/4 –
3/4
110,000
100,000
7/8 – 1 100,000
90,000
1-1/8 –
1-1/4
95,000
85,000
1-3/8 – 1-1/2 90,000
8F A194 Nuts machined from bars for
high pressure & high temperature service.
AISI 4140, 4142 or 4145, quenched & tempered 1/4 – 3/4 125,000
110,000
7/8 – 1 115,000
100,000
1-1/8 – 1-1/4 105,000
95,000
1-3/8 – 1-1/2 100,000
90,000
8P A194 Nuts machined from bars for
high pressure & high temperature service.
AISI 305 [with restricted carbon], strain hardened 1/4 – 3/4 125,000
110,000
7/8 – 1 115,000
100,000
1-1/8 –
1-1/4
105,000
95,000
1-3/8 –
1-1/2
100,000
90,000
L7 A320 Bolts,
screws, and studs for low termperature service
AISI 321, strain hardened 1/4 – 2-1/2 105 125