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 Hex Head Screw F052431 M24-3.0 x 170

NAAMS Hex Head Screw F052431 M24-3.0 x 170

SKU: FN-F052431
MPN: F052431

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052431B M24-3.0 x 170

NAAMS Hex Head Screw F052431B M24-3.0 x 170

SKU: FN-F052431B
MPN: F052431B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052432 M24-3.0 x 180

NAAMS Hex Head Screw F052432 M24-3.0 x 180

SKU: FN-F052432
MPN: F052432

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052432B M24-3.0 x 180

NAAMS Hex Head Screw F052432B M24-3.0 x 180

SKU: FN-F052432B
MPN: F052432B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052433 M24-3.0 x 190

NAAMS Hex Head Screw F052433 M24-3.0 x 190

SKU: FN-F052433
MPN: F052433

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052433B M24-3.0 x 190

NAAMS Hex Head Screw F052433B M24-3.0 x 190

SKU: FN-F052433B
MPN: F052433B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052434 M24-3.0 x 200

NAAMS Hex Head Screw F052434 M24-3.0 x 200

SKU: FN-F052434
MPN: F052434

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052434B M24-3.0 x 200

NAAMS Hex Head Screw F052434B M24-3.0 x 200

SKU: FN-F052434B
MPN: F052434B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052436 M24-3.0 x 220

NAAMS Hex Head Screw F052436 M24-3.0 x 220

SKU: FN-F052436
MPN: F052436

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052436B M24-3.0 x 220

NAAMS Hex Head Screw F052436B M24-3.0 x 220

SKU: FN-F052436B
MPN: F052436B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052437 M24-3.0 x 240

NAAMS Hex Head Screw F052437 M24-3.0 x 240

SKU: FN-F052437
MPN: F052437

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052437B M24-3.0 x 240

NAAMS Hex Head Screw F052437B M24-3.0 x 240

SKU: FN-F052437B
MPN: F052437B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052438 M24-3.0 x 260

NAAMS Hex Head Screw F052438 M24-3.0 x 260

SKU: FN-F052438
MPN: F052438

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052438B M24-3.0 x 260

NAAMS Hex Head Screw F052438B M24-3.0 x 260

SKU: FN-F052438B
MPN: F052438B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052439 M24-3.0 x 280

NAAMS Hex Head Screw F052439 M24-3.0 x 280

SKU: FN-F052439
MPN: F052439

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052439B M24-3.0 x 280

NAAMS Hex Head Screw F052439B M24-3.0 x 280

SKU: FN-F052439B
MPN: F052439B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052440 M24-3.0 x 300

NAAMS Hex Head Screw F052440 M24-3.0 x 300

SKU: FN-F052440
MPN: F052440

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052440B M24-3.0 x 300

NAAMS Hex Head Screw F052440B M24-3.0 x 300

SKU: FN-F052440B
MPN: F052440B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052442 M24-2.0 x 330

NAAMS Hex Head Screw F052442 M24-2.0 x 330

SKU: FN-F052442
MPN: F052442

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052442B M24-2.0 x 330

NAAMS Hex Head Screw F052442B M24-2.0 x 330

SKU: FN-F052442B
MPN: F052442B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052443 M24-3.0 x 340

NAAMS Hex Head Screw F052443 M24-3.0 x 340

SKU: FN-F052443
MPN: F052443

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F052443B M24-3.0 x 340

NAAMS Hex Head Screw F052443B M24-3.0 x 340

SKU: FN-F052443B
MPN: F052443B

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F053018 M30-3.5 x 60

NAAMS Hex Head Screw F053018 M30-3.5 x 60

SKU: FN-F053018
MPN: F053018

EMAIL SALES FOR PRICING
NAAMS Hex Head Screw F053018B M30-3.5 x 60

NAAMS Hex Head Screw F053018B M30-3.5 x 60

SKU: FN-F053018B
MPN: F053018B

EMAIL SALES FOR PRICING