Fa stener Referenc e G uideM ea suring Threa ded Fa steners (length)

M ea suring Threa ds

Hea d Sty les

To Selec t Phillips Driv er Sty leDriv er Sty les

Fa stener Identifier (D=Dia m eter)

Fla t Fla tUnderc ut

Ov a l Ov a lUnderc ut

Round Fillister Pa n Binding BindingtUnderc ut

Truss RoundW a sher

Trim m edHex a gon

IndentedHex a gon

Slotted

IndentedHex a gonW a sher

Squa re

A325

G ra de 2 G ra de 5 G ra de 8

Hea d M a rk ings of Fa steners

18-8 Sta inlessSteel

316 Sta inlessSteel

A 325Struc tura l

316

Fla t W a sher

Split Loc k W a sher

Hex N ut

A c orn C a p

C oupling

Soc k et C a p

U-Bolt

Step Bolt

Ey ebolt

W ing N ut

Hex Stop N ut

Finish W a sher

Torque W a sher

Fla nge-Loc kW ood Sc rew

D

M a c hine Sc rewO v a l Hea d Slotted

D

M a c hine Sc rewFillister Hea d Slotted

D

Plow BoltD

Dry w a ll Sc rewD

C a p Sc rewD

La g Sc rew

D

Set Sc rewN utDD

M a c hine Sc rewFla t hea d slotted

D

StudD

Sheet M eta lSc rew

D

C a rria ge Sc rewD

Squa re N ut

Ex terna l ToothLoc k W a sher

Tee N ut

Interna l ToothLoc k W a sher

Hex C a stle N ut

Elev a tor Bolt

Founda tionHook Bolt

#990030

1| Revision Date: 6/23/16 | Revised by: EM

Fastener Reference Guide

2| Revision Date: 6/23/16 | Revised by: EM

HARDWARE ABBREVIATIONS KEY

All screws should have the same information in the Description field. Use the key below to determine if the head type, tool style, size, material, and hardness are accurate.

SCREW;SH;M8X1.25PX45L-30L;HS;BZN;G12.9;

Head Type – This is the type of head on the screw. Commonly used types are: BH – Button Head FH – Flat Head Round – Round Head SH or HS – Socket Head TRH or TRHW – Truss Head

CB – Carriage Head HH – Hex Head SET – Set Screw TH – Thin Head

Size – This is the screw size, thread pitch, and length. M3 – M12 – This is the size of the screw and is normally the first dimension listed. While most screws are metric, it is possible you will see a standard screw listed (example: 3/8”). 7P – 1.75P – This is the pitch of the screw threads. This is normally consistent and does not need to be checked. The pitch will not be listed on all screws, especially smaller sizes. Length – This is the total length of the screw minus the head in millimeters. If there are two numbers here (as seen in the example description: 45L-30L), it indicates the screw is only partially threaded. The example indicates a screw that is 45mm in length with threads on only 30mm of that length. Most partial thread screws will also be labeled with P-T.

Drive Style – This is the tool style that should be used to remove the screw. HS – Hex Socket HE – Hex Head

PH – Phillips Head

Thread Style – This is the style of the threads. This will only be called out for special threading. MT – Machine Thread TC – Thread Cutting

SM – Sheet Metal

Material – This is the material used to make the screw. The material will either be black or silver, both of which have several variations.

BZN, BED, BAN, BOX – These are black versions of screws CHM, CRMO, ZINC, ZN, SS, WZN – These are silver versions of screws

Hardness – This is the material hardness of the screw. G8.8 or G12.9 – We normally use 3 different hardness settings = G8.8, G12.9, and non-specific. If hardness is called out in the description, the screw should have the hardness stamped on the head.

Head Type Size Drive Style Material Hardness