FNW NBSZ User Manual
Figure NBSZ
PIPING PRODUCTS
CARBON STEEL FLANGE NUT & BOLT SET
ASTM A307 GRADE A / SAE J995 GRADE 2
Features
• For 150# & 300# ANSI Flanges
• Lengths for Joining Two Flanges*
• Material: Carbon Steel
• Finish: Zinc Plated
• Sizes: 1/2” to 24” (150#), 1/2” to 12” (300#)
Standards
• Bolts:
○ Material - ASTM A307A Grade A
○ Dimensions - ASME B18.2.1
○ Thread - Class 2A
• Nuts:
○ Material - SAE J995 Grade 2
○ Dimensions - ASME B18.2.2
○ Thread - Class 2B
Bolt Properties
• Tensile: 60 KSI Minimum
• Elongation: 18% Minimum
• Hardness: 69 - 100 Rb
* Based on 1/16” raised face and 1/8” gasket
Figure Number Matrix
FNW NBS Z 1 Size
1/2 = D
3/4 = F
1 = G
1-1/4 = H
1-1/2 = J
2 = K
2-1/2 = L
3 = M
4 = P
5 = S
SIZE CODE
6 = U
8 = X
10 = 10
12 = 12
14 = 14
16 = 16
18 = 18
20 = 20
24 = 24
FLANGEFINISH
Zinc = Z
Note: 300# sizes are up to
12” only.
150# = 1
300# = 3
DOC: FNWNBSZ14 Ver. 12/2017
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150# Pack Quantities & Bolt Sizes (inches)
Size Bolt Qty Nut Qty Diameter Bolt Length
1/2 4 4 1/2-13 2
3/4 4 4 1/2-13 2
1 4 4 1/2-13 2-1/4
1-1/4 4 4 1/2-13 2-1/4
1-1/2 4 4 1/2-13 2-1/2
2 4 4 5/8-11 2-3/4
2-1/2 4 4 5/8-11 3
3 4 4 5/8-11 3
4 8 8 5/8-11 3
5 8 8 3/4-10 3-1/4
6 8 8 3/4-10 3-1/4
8 8 8 3/4-10 3-1/2
10 12 12 7/8-9 4
12 12 12 7/8-9 4
14 12 12 1-8 4-1/2
16 16 16 1-8 4-1/2
18 16 16 1-1/8-7 5
20 20 20 1-1/8-7 5-1/2
24 20 20 1-1/4-7 6
300# Pack Quantities & Bolt Sizes (inches)
Size Bolt Qty Nut Qty Diameter Bolt Length
1/2 4 4 1/2-13 2-1/4
3/4 4 4 5/8-11 2-1/2
1 4 4 5/8-11 2-1/2
1-1/4 4 4 5/8-11 2-3/4
1-1/2 4 4 3/4-10 3
2 8 8 5/8-11 3
2-1/2 8 8 3/4-10 3-1/4
3 8 8 3/4-10 3-1/2
4 8 8 3/4-10 3-3/4
5 8 8 3/4-10 4-1/4
6 12 12 3/4-10 4-1/4
8 12 12 7/8-9 4-3/4
10 16 16 1-8 5-1/2
12 16 16 1-1/8-7 5-3/4
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