Floating Self-Clinching Fasteners A4, AS, AC - Unified On Hi-Tech Fasteners, Inc.

Locking and Non-locking Threads
These fasteners provide load-bearing threads in thin sheets and permit up to .030” adjustment for mating hole misalignment.

The self-clinching feature offers fast and simple assembly. The fasteners are squeezed into prepared holes using any standard press. The sheet remains flush on one side, and the fastener is permanently locked in place.

Extra strength and support in assembly is obtained by the threads of the floating nut extending fully into the retainer shank (a unique PEM feature). A self-locking version of the fastener is also offered. Thread locking torque performance is equivalent to applicable NASM25027 specifications.

Non-locking Type A4 and self-locking Type LA4 fasteners provide load-bearing threads in stainless steel sheets as thin as .038” with hardness up to HRB 88 on the Rockwell “B” scale.

Many PEM Type AS and AC self-clinching floating fasteners correspond to sizes in US NASM45938/11 specifications. Check our web site for a complete Military Specification and National Aerospace Standards Reference Guide (Bulletin NASM).

Floating Self-Clinching Fasteners - Types A4, AS, AC 2

Part #	Thread Size	A (Shank) Max.	Hole Size in Sheet + .003 - .000	C Max.	E ± .015	Fastener Material	Standard Finish - Retainer & Nut	CAD	Inventory
AS-440-1ZI	N/A .112-40 (#4-40)	N/A 0.038 in	N/A .290 in	N/A .289 in	N/A .360 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-632-1ZI	N/A .138-32 (#6-32)	N/A 0.038 in	N/A .328 in	N/A .327 in	N/A .390 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-832-1ZI	N/A .164-32 (#8-32)	N/A 0.038 in	N/A .368 in	N/A .367 in	N/A .440 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-024-1ZI	N/A .190-24 (#10-24)	N/A 0.038 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-032-1ZI	N/A .190-32 (#10-32)	N/A 0.038 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-440-2ZI	N/A .112-40 (#4-40)	N/A .054 in	N/A .290 in	N/A .289 in	N/A .360 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-632-2ZI	N/A .138-32 (#6-32)	N/A .054 in	N/A .328 in	N/A .327 in	N/A .390 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-832-2ZI	N/A .164-32 (#8-32)	N/A .054 in	N/A .368 in	N/A .367 in	N/A .440 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-024-2ZI	N/A .190-24 (#10-24)	N/A .054 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-032-2ZI	N/A .190-32 (#10-32)	N/A .054 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-0420-2ZI	N/A .250-20 (1/4-20)	N/A .054 in	N/A .515 in	N/A .514 in	N/A .600 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AS-0428-2ZI	N/A .250-28 (1/4-28)	N/A .054 in	N/A .515 in	N/A .514 in	N/A .600 in	N/A Steel	N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless	N/A	N/A {0}
AC-440-1	N/A .112-40 (#4-40)	N/A 0.038 in	N/A .290 in	N/A .289 in	N/A .360 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-632-1	N/A .138-32 (#6-32)	N/A 0.038 in	N/A .328 in	N/A .327 in	N/A .390 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-832-1	N/A .164-32 (#8-32)	N/A 0.038 in	N/A .368 in	N/A .367 in	N/A .440 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-024-1	N/A .190-24 (#10-24)	N/A 0.038 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-032-1	N/A .190-32 (#10-32)	N/A 0.038 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-440-2	N/A .112-40 (#4-40)	N/A .054 in	N/A .290 in	N/A .289 in	N/A .360 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-632-2	N/A .138-32 (#6-32)	N/A .054 in	N/A .328 in	N/A .327 in	N/A .390 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-832-2	N/A .164-32 (#8-32)	N/A .054 in	N/A .368 in	N/A .367 in	N/A .440 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-024-2	N/A .190-24 (#10-24)	N/A .054 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-032-2	N/A .190-32 (#10-32)	N/A .054 in	N/A .406 in	N/A .405 in	N/A .470 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-0420-2	N/A .250-20 (1/4-20)	N/A .054 in	N/A .515 in	N/A .514 in	N/A .600 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
AC-0428-2	N/A .250-28 (1/4-28)	N/A .054 in	N/A .515 in	N/A .514 in	N/A .600 in	N/A 300 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}
A4-440-1	N/A .112-40 (#4-40)	N/A 0.038 in	N/A .290 in	N/A .289 in	N/A .360 in	N/A 400 Series Stainless Steel	N/A Passivated and/or tested per ASTM A380	N/A	N/A {0}

N/A 0.038 in

N/A .290 in

N/A .289 in

N/A .360 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-632-1ZI

N/A .138-32 (#6-32)

N/A 0.038 in

N/A .328 in

N/A .327 in

N/A .390 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-832-1ZI

N/A .164-32 (#8-32)

N/A 0.038 in

N/A .368 in

N/A .367 in

N/A .440 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-024-1ZI

N/A .190-24 (#10-24)

N/A 0.038 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-032-1ZI

N/A .190-32 (#10-32)

N/A 0.038 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-440-2ZI

N/A .112-40 (#4-40)

N/A .054 in

N/A .290 in

N/A .289 in

N/A .360 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-632-2ZI

N/A .138-32 (#6-32)

N/A .054 in

N/A .328 in

N/A .327 in

N/A .390 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-832-2ZI

N/A .164-32 (#8-32)

N/A .054 in

N/A .368 in

N/A .367 in

N/A .440 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-024-2ZI

N/A .190-24 (#10-24)

N/A .054 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-032-2ZI

N/A .190-32 (#10-32)

N/A .054 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-0420-2ZI

N/A .250-20 (1/4-20)

N/A .054 in

N/A .515 in

N/A .514 in

N/A .600 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AS-0428-2ZI

N/A .250-28 (1/4-28)

N/A .054 in

N/A .515 in

N/A .514 in

N/A .600 in

N/A Steel

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

N/A

N/A {0}

AC-440-1

N/A .112-40 (#4-40)

N/A 0.038 in

N/A .290 in

N/A .289 in

N/A .360 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-632-1

N/A .138-32 (#6-32)

N/A 0.038 in

N/A .328 in

N/A .327 in

N/A .390 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-832-1

N/A .164-32 (#8-32)

N/A 0.038 in

N/A .368 in

N/A .367 in

N/A .440 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-024-1

N/A .190-24 (#10-24)

N/A 0.038 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-032-1

N/A .190-32 (#10-32)

N/A 0.038 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-440-2

N/A .112-40 (#4-40)

N/A .054 in

N/A .290 in

N/A .289 in

N/A .360 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-632-2

N/A .138-32 (#6-32)

N/A .054 in

N/A .328 in

N/A .327 in

N/A .390 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-832-2

N/A .164-32 (#8-32)

N/A .054 in

N/A .368 in

N/A .367 in

N/A .440 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-024-2

N/A .190-24 (#10-24)

N/A .054 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-032-2

N/A .190-32 (#10-32)

N/A .054 in

N/A .406 in

N/A .405 in

N/A .470 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-0420-2

N/A .250-20 (1/4-20)

N/A .054 in

N/A .515 in

N/A .514 in

N/A .600 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

AC-0428-2

N/A .250-28 (1/4-28)

N/A .054 in

N/A .515 in

N/A .514 in

N/A .600 in

N/A 300 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}

A4-440-1

N/A .112-40 (#4-40)

N/A 0.038 in

N/A .290 in

N/A .289 in

N/A .360 in

N/A 400 Series Stainless Steel

N/A Passivated and/or tested per ASTM A380

N/A

N/A {0}