Part # U-256-1, Miniature Self-Clinching Fasteners - Types U, UL, FE, FEO, FEOX, FEX

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	All Categories Miniature Self-Clinching Fasteners - Types U, UL, FE, FEO, FEOX, FEX - Unified


All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Nuts for Sheet Metal > Miniature Nuts – Types FE, FEO, FEOX, FEX, U, UL > Miniature Self-Clinching Fasteners - Types U, UL, FE, FEO, FEOX, FEX - Unified > Part # U-256-1


	Part # U-256-1, Miniature Self-Clinching Fasteners - Types U, UL, FE, FEO, FEOX, FEX - Unified

PEM® brand miniature fasteners fit into a minimal space and provide strong, reusable threads.

Types FE, FEO and UL are self-locking. Types FE and FEO thread locking torque performance is equivalent to applicable NASM25027 specifications. Ty

Miniature nuts – FE, FEO, FEOX, FEX, U, UL

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Miniature Self-Clinching Fasteners - Types U, UL, FE, FEO, FEOX, FEX 2

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Specifications

Thread Size

.086-56 (#2-56)

Thread Type

Non-Locking

Thread Code

256

Shank Code¹

A (Shank) Max.

.031 in

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Sheet Thickness²

.030 to .036 in

Hole Size in Sheet + .003 - .000

.144 in

C + .000 - .005

.144 in

D Max.

.106 in

E ± .005

.160 in

T + .015 -.000

.065 in

Min. Dist. Hole C/L to Edge

.110 in

Max. Hole in Attached Parts

.106 in

For Use in Sheet Hardness³

HRB 70 / HB 125 or Less

Thread Specification

Internal, ANSI B1.1, 2B

Fastener Material

300 Series Stainless Steel

Standard Finish

Passivated and/or tested per ASTM A380

CAD Supplier

PennEngineering® (PEM®)

¹ Shank code applicable only to Types U and UL fasteners.
² In applications between the sheet thicknesses for your thread size, see last paragraph of installation data on page FE-6. Knurled collar may fracture if fastener is used in sheets thicker than the specified range and the screw is tightened beyond maximum tightening torque.
³ HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.

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Part # U-256-1, Miniature Self-Clinching Fasteners - Types U, UL, FE, FEO, FEOX, FEX - Unified

Thread Size

Thread Type

Thread Code

Shank Code¹

A (Shank) Max.

Sheet Thickness²

Hole Size in Sheet + .003 - .000

C + .000 - .005

D Max.

E ± .005

T + .015 -.000

Min. Dist. Hole C/L to Edge

Max. Hole in Attached Parts

For Use in Sheet Hardness³

Thread Specification

Fastener Material

Standard Finish

CAD Supplier

Download our brochure

Product resources

Services

Our Brands

Useful Links

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Part # U-256-1, Miniature Self-Clinching Fasteners - Types U, UL, FE, FEO, FEOX, FEX - Unified

Thread Size

Thread Type

Thread Code

Shank Code1

A (Shank) Max.

Sheet Thickness2

Hole Size in Sheet + .003 - .000

C + .000 - .005

D Max.

E ± .005

T + .015 -.000

Min. Dist. Hole C/L to Edge

Max. Hole in Attached Parts

For Use in Sheet Hardness3

Thread Specification

Fastener Material

Standard Finish

CAD Supplier

Download our brochure

Product resources

Services

Our Brands

Useful Links

Departments

Shank Code¹

Sheet Thickness²

For Use in Sheet Hardness³