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Barrell Nuts – FBL10030 Series

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FBL10030 Series Material:

Nut: 4140 pr 8740 Alloy Steel per MIL-S-5625 or MIL-S-6049. (Cadmium plated per QQ-P-416, Type I, Class 2.)

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Dry film lube per MIL-L-40610.

Anti-seize cmpound per MIL-A-907 applied to internal theads.

Barrel: 4140 Allot Steel per MIL-S-5626 (Cadmium plated per QQ-P-416, Type II, Class 2.)

Retaining Pin: AISI 420 CRES. (Passivated per QQ-P-35.)

Heat Treat:

Nut: Per MIL-H-6875.

Barrel: Per MIL-H-6875.

Locking Element:

The locking feature is capable of 250 seated usable cycles within the torque limits of MIL-N-25027 when tested at room temperature with 160 KSI minimum ultimate tensile strength, cadmium plated, alloy steel bolts.

This barrel nut is similar to the dimensional envelope specified in NAS 577.

Threads:

Per MIL-S-8879, except in locking area and prior to lubrication.

PART NO.

T THREADSIZE

A DIA.

+0.000

-0.003

B

D MAX.

E

+0.005

F REF.

G REF.

H

±0.005

SEATING TORQUE INCH/LBS.

FBN10030-4

.2500-28 UNJF-3B

0.528

0.625

0.406

0.315

0.45

0.44

0.286

60.0

FBN10030-5

.3125-24 UNJF-3B

0.590

0.688

0.468

0.355

0.49

0.46

0.349

120.0

Retainers for Use with FBL10030 Series Barrel Nuts Above

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To be used with Barrel Nut above to allow prepositioning of the assembly within its prepared hole.

Material:

Steel, AISI C-1035, AISI C-1050 or AISI C-1060.

Heat Treat:

Rockwell ‘C’ 40 minimum per MIL-H-6875.

Finish:

Cadmium plated per QQ-P-416, Type II, Class 2.

PART NO.

A

±0.020

B

±0.020

D

±0.003

E MIN.

FBN10030-4RET

0.478

0.615

0.010

0.223

FBN10030-5RET

0.534

0.678

0.012

0.258

Fairchild Fasteners Tridair Products 11

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