NAAMS Fastener Components

NAAMS Fastener Components are used to keep everything together. Products range from screws and bolts to pins, nuts, and washers. Metric fasteners are coated blue to help you easily and quickly distinguish from standard sizes.

For the full catalog in PDF format, click on the link below.
NAAMS Fasteners Complete Catalog

NAAMS Fastener Dimensional Specs Material Specs
Socket Head Cap Screws ANSI B18.3.1M ASTM A574M
Hex Head Cap Screws ANSI B18.2.3.1M ASTM F568M, Class 10.9
Base Leveling Screws M24 x 2.9 x 150 HHCS Property Class 10.9
Hex Nuts ANSI B18.2.4.2M ASTM A563M, Class 12
Lock Nuts ANSI B18.16.3M ASTM A563M, Class 12
Hex Jam nuts ANSI B18.2.4.5M ASTM A563M, Class 04
Shoulder Screws ANSI B18.3.3M ANSI B18.3.3M
Socket Set Screws ANSI B18.3.6M Class 45H
Flat Head Cap Screws ANSI B18.3.5M ASTM F835M
Button Head Cap Screws ANSI B18.3.4M ASTM F835M
PullOut Dowel Pins ISO 8735A -
Flat Washers (M6 - M10) - Rc 38-45 through hardening
Flat Washers (M12 and Larger) ASTM F436M ASTM F436M

 

FASTENER INSTALLATION AND TORQUING PROCEDURE (EXCLUDING SHOULDER SCREWS)
Provided to you by NAAMS Standards

GENERAL
• This standard applies only to Property Class 10.9 hex head and 12.9 socket head cap screws when used in steel, un-lubed, and where the head bears against a metal surface. Where the bearing surface is not a metal (e.g. UHMW plastic), the tightening specification for any fastener shall be “snug fit then 1/4 turn”.
• For purposes of uniformity in clamp loading, the calculations for the recommended installation torques listed below are based upon K = 0.20 for uncoated screws and K = 0.15 for blue-coated screws.
• Testing by reputable fastener manufacturers has proven that the use of split lock washers under heads of hardened screws may prevent achieving or retaining the desired preload in bolted joints.

INSTALLATION PROCEDURE
1. Use only new fasteners for first-time assembly.
2. Before installing the fastener, be sure that it is free of flaws and it is the correct property class.
Fasteners with flaws shall be marked with a white line drawn across the threads and discarded.
3. Fasteners may be tightened with any appropriate fastening device. Final torque shall be done with a calibrated torque wrench to the required value as follows:

Nominal Diameter and Thread Pitch Recommended Installation Torque (Nm)
Uncoated Coated
Property Class 10.9 Property Class 12.9 Property Class 10.9 Property Class 12.9
M6 x 1.0 16 19 12 14
M8 x 1.25 39 45 29 34
M10X 1.5 76 89 58 68
M12 X 1.75 134 156 100 120
M16 X 2.0 331 387 250 290
M20 X 2.5 644 760 485 570
M24 X 3.0 1120 1308 840 985
M30 X 3.5 2226 2595 1670 1960

4. After torquing is completed, draw a straight line (match mark) from the wall of the fastener head onto the seating surface using a white steel paint pen. Ensure that the line is easily visible for periodic inspection.
5. A fastener suspected of being over-torqued shall be marked as described in item 2 and discarded.
6. Do not torque fasteners at machine breakpoints until final installation.
7. Where safety wiring is specified, do not safety wire any screws until they have passed the torque audit?
8. If fasteners are in a position that a torque wrench cannot be used, the following steps shall be used:
a) Tighten the fastener until the joint surfaces have established a snug fit.
b) Mark the position of the fastener to the surface with a white steel paint pen.
c) Tighten the fastener 1/3 of a turn (120).
d) After torquing is completed, draw a straight line (match mark) from the wall of the fastener head onto the seating surface using a white steel paint pen. Ensure that the line is easily visible for periodic inspection.


NAAMS Hardened Washer F620614

NAAMS Hardened Washer F620614

SKU: FN-F620614
MPN: F620614

Regular price $0.36
NAAMS Hardened Washer F620818

NAAMS Hardened Washer F620818

SKU: FN-F620818
MPN: F620818

Regular price $0.91
NAAMS Hardened Washer F621022

NAAMS Hardened Washer F621022

SKU: FN-F621022
MPN: F621022

Regular price $0.91
NAAMS Hardened Washer F621025

NAAMS Hardened Washer F621025

SKU: FN-F621025
MPN: F621025

EMAIL SALES FOR PRICING
NAAMS Hardened Washer F621227

NAAMS Hardened Washer F621227

SKU: FN-F621227
MPN: F621227

Regular price $1.01
NAAMS Hardened Washer F621634

NAAMS Hardened Washer F621634

SKU: FN-F621634
MPN: F621634

Regular price $0.91
NAAMS Hardened Washer F622042

NAAMS Hardened Washer F622042

SKU: FN-F622042
MPN: F622042

Regular price $1.07
NAAMS Hardened Washer F622244

NAAMS Hardened Washer F622244

SKU: FN-F622244
MPN: F622244

Regular price $2.61
NAAMS Hardened Washer F622450

NAAMS Hardened Washer F622450

SKU: FN-F622450
MPN: F622450

Regular price $2.00
NAAMS Hardened Washer F622756

NAAMS Hardened Washer F622756

SKU: FN-F622756
MPN: F622756

Regular price $2.01
NAAMS Hardened Washer F623060

NAAMS Hardened Washer F623060

SKU: FN-F623060
MPN: F623060

Regular price $3.72
NAAMS Hardened Washer F623672

NAAMS Hardened Washer F623672

SKU: FN-F623672
MPN: F623672

Regular price $1.18
NAAMS Hex Head Screw F051210

NAAMS Hex Head Screw F051210

SKU: FN-F051210
MPN: F051210

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F051210B

NAAMS Hex Head Screw F051210B

SKU: FN-F051210B
MPN: F051210B

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NAAMS Hex Head Screw F051211

NAAMS Hex Head Screw F051211

SKU: FN-F051211
MPN: F051211

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NAAMS Hex Head Screw F051211B

NAAMS Hex Head Screw F051211B

SKU: FN-F051211B
MPN: F051211B

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NAAMS Hex Head Screw F051212

NAAMS Hex Head Screw F051212

SKU: FN-F051212
MPN: F051212

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NAAMS Hex Head Screw F051212B

NAAMS Hex Head Screw F051212B

SKU: FN-F051212B
MPN: F051212B

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NAAMS Hex Head Screw F051213

NAAMS Hex Head Screw F051213

SKU: FN-F051213
MPN: F051213

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NAAMS Hex Head Screw F051213B

NAAMS Hex Head Screw F051213B

SKU: FN-F051213B
MPN: F051213B

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NAAMS Hex Head Screw F051214

NAAMS Hex Head Screw F051214

SKU: FN-F051214
MPN: F051214

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NAAMS Hex Head Screw F051214B

NAAMS Hex Head Screw F051214B

SKU: FN-F051214B
MPN: F051214B

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NAAMS Hex Head Screw F051215

NAAMS Hex Head Screw F051215

SKU: FN-F051215
MPN: F051215

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F051215B

NAAMS Hex Head Screw F051215B

SKU: FN-F051215B
MPN: F051215B

EMAIL SALES FOR PRICING