Nuclear Grade Fasteners Certified to NQA-1, ASME Section III, 10CFR50 Appendix B

Safety related fasteners for nuclear power applications.

DuBose National Energy manufactures and stocks a variety of ASME Section III, Nuclear Safety Related and MIL Spec fasteners. We have certified material, precision equipment and experienced personnel to manufacture your special orders to all relevant quality standards – NQA-1, ASME NCA 3800, 10CFR50B, N45.2 and more. In emergency situations, we have 24/7 programs designed to expedite every step of the process to get critical safety-related fasteners delivered rapidly.

Our standard product line of nuclear grade fasteners includes nuts, bolts, studs and washers.

In-house CNC machining produces specialty fasteners, fittings and precision machined components certified to appropriate quality standards.

Nuclear Quality Certifications

NQA-1
ASME Section III, Division 1
10 CFR 50, Appendix B
10 CFR 50, Part 21
ANSI N45.2
NCA-4000

Hex Bolts, Hex Cap Screws

ANSI/ASME B18.2.1
Hex Cap
Heavy Hex
Square Head Bolts
Structural – ANSI B18.2.6
Drilled
Specials

Materials: ASME/ASTM
A/SA193 B6, B7, B8, B8M, B8S, B16
A540, All Grades
A/SA 320 Gr. L7, L43, B8 Series
A/SA-325, A/SA-449, A/SA-490
A/SA-354 Gr. BC, BD
A/SA-453 Gr. 660A/B
A/SA-540 All Grades
A/SA-564
A/SA-307
F-593

Hex Nuts

ANSI/ASME B18.2.2
Heavy Hex Nuts
Finish Hex Nuts
Heavy/Finished Jam Nuts
Thin Nuts
Thick Nuts
Square Nuts

Materials: ASME/ASTM
A/SA-194 Gr. 1, 2, 2H, 3, 4, 6, 6F, 7, 7M, 8, 8F, 8M, 8R, 8S
A/SA563 Gr. A, B, C, D, DH
A/SA-540
A/SA-564
F-594
F-467, 17-4, XM19, 718
A/SA-453 Grade 660A/B

Socket Products

ANSI/ASME B18.3
Socket Cap Screws
Low Head
Button Head
Shoulder Screws
Flat Head

Materials: ASME/ASTM
A/SA-574
A/SA-193 Gr. B5, B6, B7, B8, B8M, B16, B8S
F-835
F-837
F-879
F-880
A/SA-453 Grade 660A/B

Full Threaded Rod & Threaded Studs

ANSI/ASME B18.31.2, B18.31.3 and IFI-136
Full Thread Rod
Full Thread Studs
Double End Studs
Closure Studs
Interference Fit Specials

Materials: ASME/ASTM
A/SA-193 Gr. B6, B7, B7M, B8, B8A, B8M, B16
A/SA-540, All Grades

Washers

ANSI/ASME B18.21.1
Flat Washers
Helical Spring Lock Washers
Heavy Duty Lock Washers
Internal / External Tooth Washers
Type A Washers
Type B Washers
Beveled Washers
Clipped Washers

Materials:
ASTM F-436 Type 1
ASTM F-436 Type 3
ASTM F-844
Carbon Steel
Stainless Steel
Alloy Steel
Zinc / Galvanized

Custom Sizes and Materials made to order.

Set Screws

ANSI/ASME B18.3
Flat Point
Oval Point
Cup Point
Half Dog
Cone Point

Materials: ASME/ASTM
Alloy Steel
Carbon Steel
Stainless Steel
ASTM A-307
ASTM F-880
ASTM F-912
A/SA-193, All Grades
A/SA-320 Gr L7, L43, B8 Series

Pins

ANSI/ASME B18.8.2
Dowel Pins
Taper Pins
Cotter Pins
Groove Pins

Materials: ASME/ASTM
A/SA-193 Gr. B5, B6, B7, B8, B8M, B16, B8S
A/SA-320 Gr. L7, L43, B8 series
A/SA-540 Gr. B21, B22, B23, B24
A/SA-564 Type 630
SA-453 Grade 660A/B

Machine Screws

ANSI B18.6.3
Round Head
Pan Head
Oval
Flat Countersunk
Drilled
Truss
Fillister
Slotted
Hex
Hex Washer Head

Materials:
Carbon Steel
Stainless Steel
Alloy Steel
Brass
Silicon Bronze

MIL Specs & Specials

Machined Bushings

Materials:
A/SA-193 Gr. B5, B6, B7, B8, B8M, B16, B8S)
A/SA-320 Gr. L7, L43, B8 series)
A/SA-540 Gr. B21, B22, B23, B24
A/SA-564 Type 630
SA-453 Grade 660A/B

Custom Sizes and Materials made to order.

Hilti Bolts, Anchor Bolts / Rods

Materials:
A-36
A-108
A-307
Carbon Steel
Stainless Steel
Alloy Steel
F-1554

Special Application Nuts

ANSI/ASME B18.2.2
Lock Nuts
Hex Coupling
Nylon Inserts
Cap Nuts
Square Nuts
Slotted Nuts

Materials:
Carbon Steel
Stainless Steel
Brass

Special Threaded Plugs

Square Head
Hex Head
Socket Head
NPT Thread Series

Materials:
A/SA-193 Gr. B5, B6, B7, B8, B8M, B16, B8S
A/SA-320 Gr. L7, L43, B8 series
A/SA-540 Gr. B21, B22, B23, B24
A/SA-564 Type 630
SA-453 Grade 660A/B
SA-182
F-316