12NWO Backup Nut

Description & Features

Manufactured from straight steel, this male JIC SAE 37-degree flare backup nut is designed for use with 3/4-inch OD tube connections conforming to SAE J514. The 12NWO Backup Nut belongs to Brennan Industries' 0306-N series and features a 1 1/16-12 male thread with a hex width of 1.250 inches and an overall length of 0.410 inches.

Backup nuts are used in conjunction with JIC fittings to secure and support the swivel nut, helping maintain joint integrity in hydraulic lines subject to vibration or repeated assembly cycles. The straight steel construction suits standard hydraulic service environments where this thread size and flare type are specified.

California residents: Prop 65 Warning applies to this product.

SKU: 0306-N-12

Supplier Part Number (MPN): 0306-N-12

Specifications

Brand
Brennan Industries Inc
Brand
Brennan Industries
Pack Size
1.00
UOM
EA
Supplier Part Number
0306-N-12
Product Weight
0.06 lbs

Product Questions & Answers (1)

Question by: Rex S on Jan 31, 2026, 6:41 AM
Will this backup nut fit my hydraulic line with a 3/4-inch OD tube?
Answer by: Customer Support on Feb 2, 2026, 6:32 AM
This backup nut is made to work with 3/4-inch OD tube connections that follow the SAE J514 standard.